2020-02-17 12:10:00

23 files changed, 650 insertions, 118 deletions

diff --git a/doc/context/documents/general/manuals/luametatex.pdf b/doc/context/documents/general/manuals/luametatex.pdf
index 766e9a709..95e7786fe 100644
--- a/doc/context/documents/general/manuals/luametatex.pdf
+++ b/doc/context/documents/general/manuals/luametatex.pdf
diff --git a/doc/context/sources/general/manuals/luametatex/luametatex-metapost.tex b/doc/context/sources/general/manuals/luametatex/luametatex-metapost.tex
index 5128f3d2a..6cee0f493 100644
--- a/doc/context/sources/general/manuals/luametatex/luametatex-metapost.tex
+++ b/doc/context/sources/general/manuals/luametatex/luametatex-metapost.tex
@@ -86,10 +86,10 @@ Note that the new version of \MPLIB\ no longer uses binary mem files, so the way
 to preload a set of macros is simply to start off with an \type {input} command
 in the first \type {execute} call.
 
-When you are processing a snippet of text starting with \type {btex} and
-ending with either \type {etex} or \type {verbatimtex}, the \METAPOST\
-\type {texscriptmode} parameter controls how spaces and newlines get honoured.
-The default value is~1. Possible values are:
+When you are processing a snippet of text starting with \type {btex} or \type
+{verbatimtex} and ending with \type {etex}, the \METAPOST\ \type {texscriptmode}
+parameter controls how spaces and newlines get honoured. The default value is~1.
+Possible values are:
 
 \starttabulate[|l|p|]
 \DB name      \BC meaning \NC \NR
@@ -353,8 +353,8 @@ represents a knot.
 \stoptabulate
 
 There is one special case: pens that are (possibly transformed) ellipses have an
-extra string-valued key \type {type} with value \type {elliptical} besides the
-array part containing the knot list.
+extra key \type {type} with value \type {elliptical} besides the array part
+containing the knot list.
 
 \subsection{Colors}
 
diff --git a/doc/context/sources/general/manuals/musings/musings-names.tex b/doc/context/sources/general/manuals/musings/musings-names.tex
new file mode 100644
index 000000000..55641ecd9
--- /dev/null
+++ b/doc/context/sources/general/manuals/musings/musings-names.tex
@@ -0,0 +1,325 @@
+% language=uk
+
+\startcomponent musings-names
+
+\environment musings-style
+
+\startchapter[title={What's in a name}]
+
+\startlines \setupalign[flushright]
+Hans Hagen
+Hasselt NL
+May 2019
+\stoplines
+
+\startsection[title=\TEX]
+
+I sometimes wonder how much the fact that English is the language mostly used in
+programming environments influences the way one looks at a program. For instance,
+translating the names of an operating system \quote {windows}, an image
+manipulation program \quote {photoshop} or a text editing program \quote
+{wordperfect} to Dutch makes them sound kind of silly to me. The name can
+influence what you buy or are willing to use. These are examples of commercial
+programs but there are plenty examples of such naming in the open source universe
+too. I write this in my own bad English so that other non|-|English speakers can
+try to do a similar exercise.
+
+So, when I was reading an article about \CPU\ technology called \quote
+{thread|-|ripper} and after a while also saw the usual talk of yet another bunch
+of technologies marked as \quote {stack} and translated that to Dutch it again
+made me feel somewhat puzzled about such names. From there it was a small step to
+wondering about programming languages, and especially the ones I use: \TEX,
+\METAPOST, and \LUA.
+
+One can even wonder to what extent the quality of programming is influenced by
+the names of commands and keywords. A language name \quote {\BASIC} sounds less
+serious than \quote {C}. A meaningless \quote {\LUA} sounds different than \quote
+{\PYTHON}. Does using your native tongue make a difference? In Dutch and German
+words tend to get long. When I look at my French dictionary it is rather thin,
+but we might need accented characters. Words in a language like Polish can differ
+per usage. What if German or Spanish had been chosen as the language for what is
+now the United States? How would we perceive programming and what would look
+natural to us?
+
+\stopsection
+
+\startsection[title=\TEX]
+
+The \TEX\ language comes with a lot of so called primitives built in. Many of
+these relate to concepts in the program. For instance, a movement in horizontal
+or vertical direction that can stretch or shrink depending on what the boundary
+conditions demand, is called \quote {glue}. When discussing this in Dutch the
+word \quote {lijm} can be used and after seeing it a few times it might sound ok.
+We can probably use \quote {elastiek} (\quote {elastic}).
+
+This internal concept is actually represented to the user via the interface name
+\quote {skip}, take: \type {\abovedisplayskip} and \type {\belowdisplayskip}.
+Here the word \quote {display} refers to math that gets vertical space around it
+and is normally typeset in a somewhat larger way compared to \quote {inline}. The
+word \quote {skip} can be translated to \quote {sprong} (translated back we could
+as well get \quote {jump}). But how to translate \quote {display}? An internet
+translation can be \quote {tentoonspreiding} but apart from it being a long word
+it sounds pretty weird for something math. The combined translation of such a
+command will not work well I think so probably complete different words has to be
+made up to describe these quantities. Taco suggested that {\en \typ
+{\bovenuitstallingkortesprong}} might work for \type {\abovedisplayshortskip} but
+luckily no ordinary \TEX\ user will not set such parameters in a document source.
+
+In \CONTEXT\ we use the somewhat typographical term \type {wit} or \type
+{witruimte} for vertical spacing. Some parameters like \type {\baselineskip} can
+be translated directly to the Dutch \type {\regelafstand} which is a proper
+typographical term (\TEX\ has no concept of line height). Okay, it can become
+messy when we translate \type {\lineskip} by \typ {\interlinespace} as that
+could be seen as the baseline skip too (\quote {interlinie} comes to mind). Quite
+a mess. In many cases we probably would not handle the \type {skip} part in
+parameter: \type {leftskip} could become \type {\linkermarge} and \type
+{\parfillskip} can become \typ {\paragraafuitvulling}.
+
+Another concept is that of \quote {penalty}, or in Dutch \type {boete}. It's
+probably harder to get the combinations right, simply because they have no
+typographical meanings, they're more process controllers. I fear that most
+translations would sound pretty weird to me. So, how do they sound to a native
+English speaker? Words like \quote {club} or \quote {widow} can be translated to
+their Dutch gender neutral counterparts \quote {wees} and \quote {weduw} but how
+strange does {\nl \typ {weduwboete}} sound?
+
+The counter variables are easier. When they end on \type {char} that can become
+\type {karakter}. However, translating \type {\escapechar} with \type
+{\ontsnappingskarakter} might look a bit weird, but as that one is used very
+seldom, a weird one doesn't matter much. Operators like \type {\advance} and
+\type {\multiply} can become \type {\verhoog} and \type {\vermenigvuldig} which
+doesn't sound that strange in this context.
+
+There are \quote {rule}s and \quote {box}es. The first one can be translated to
+\quote {lijn} which sounds quite good. But what to do with the second one. We can
+use \quote {blok} (which translates back to \quote {block}) which is good when we
+start stacking things, but also with \quote {doos} which is more literal but
+sounds to me somewhat silly: \typ {\hdoos {whatever}}. I'm not so sure if I would
+have seen that in a book about \TEX, I'd looked further into the language. The
+optional keywords \quote {width} etc. can be translated well into \quote
+{breedte} etc., so no problem there.
+
+There are all kinds of very peculiar aspects that need a translation. For instance
+the (for new users intimidating) primitive \type {\futurelet}. The \quote {future}
+part is no problem as \quote {toekomst} isn't that weird but the \quote {let}
+will for sure become something very long in Dutch, so we end up with {\nl \typ
+{\toekomstigetoekenning}}, but seeing that long one, we can consider {\nl \type
+{kijkvooruit}} as reasonable alternative. It definitely leads to more verbose
+programming.
+
+Expansion is a tricky one. I have no clue what would make nice translations of
+the primitives \type {\noexpand} and \type {\expandafter}. The Dutch \quote
+{uitbreiden} simply is not sounding good here. Taco Hoekwater came up with a good
+alternative \quote {uitvouwen} for \quote {expand} and I like that one because
+we then can let bookmaker (a somewhat dubious term in itself) Willi Egger organize
+a workshop in unfolding (instead of folding).
+
+Talking of \quote {macros} is less a problem because there is no Dutch word for
+it. There are more words with no real translations: \type {\kern} for instance
+probably would need some thinking but there might be a typographical equivalent
+that can be used.
+
+The \ETEX\ and \LUATEX\ extensions introduce new names, like \type {\detokenize},
+\type {\boundary} and \type {\attribute}. The first one is hard to translate
+because again it relates to an internal concept: \type {tokens}. I get the
+feeling that translating each occurrence of \type {token} by \type {teken} kind
+of makes everything look less serious. To strip something from its special
+meaning, which is actually what \type {\detokenize} does can give weird
+translations: {\nl \typ {\onttekenen}} is not really a Dutch word so a complete
+different one has to be found that describes what happens, like \type
+{\ontwaarderen}. On the other hand, \type {\boundary} and \type {\attribute} can
+translate directly into \type {\grens} and \type {\attribuut} where the last one
+sounds mostly okay.
+
+Just to get you thinking: how would you translate \type {\looseness} (\type
+{losheid}, related to linebreaking), \type {\deadcycles} (\type {\zinlozelus}, in
+the perspective of building pages), \type {\pretolerance} (again line break
+related, here we can use something \type {tolerantie}) and \type {\prevgraf}
+(which is actually even in English a weird one but hardly used anyway, so Taco
+likes {\nl \typ {voorloopregels}})? The easy ones are \type {\omit}, \type {\meaning},
+\type {\number}, maybe even \type {\mark}. The for users often difficult to grasp
+\quote {catcode} can be simplified to \quote {code} which is proper Dutch.
+Concepts like \quote {align} translate well to \quote {uitlijnen}. Short ones
+like \type {\wd} could be a problem but any two letter combination can look bad,
+so \type {\br} could do. In the same fashion \type {\def} is ok as it is also the
+start of the Dutch \quote {definitie}. Mathematical terms like \quote {text},
+\quote {script} and \quote {scriptscript} can be confusing: \quote {tekst} will
+do but \quote {schrift} is strange.
+
+Conditionals are not the hardest part: \type {\if} becomes \type {\als}, \type
+{\else} becomes \type {\anders} and \type {\or} is \type {\of}. However, turning
+\type {\ifcase} into \type {\inhetgevaldat} can be over the top. The \type
+{\every...} register variables can also be translated quite well, by using the
+\type {\elk} or \type {\elke} prefix. They are seldom seen at the user level so
+no real problem there.
+
+The \quote {group} related commands are easy as \quote {groep} is a good Dutch
+equivalent. Even \quote {global} operations translate well (\type {globaal}). A
+dubious one is \type {\font} because we can use {\nl \typ {\lettertype}} but it's
+not really a translation. The internet translations tend towards \quote
+{fountain} kind of things.
+
+The concept of \quote {discretionary} again needs a decent typographical
+translation although \type {\hyphenation} can become \type {\afbreking},
+translating \type {\discretionary} needs some imagination. The concept of \quote
+{leaders} is again something that can best be bound to something more
+typographical because \type {\leaders} turned {\nl \typ {\leidinggevende}} is not
+an option nor is \type {\leiders}.
+
+The prefix \type {\un} as used in \type {\unhbox} can become \type {\ont} so that
+we get \type {\ontdoos} but I get the feeling that this one can be source of
+jokes. The more verbose {\nl \typ {\pakdoosuit}} (equivalent to \typ
+{\unpackbox}) would do better. To translate \type {\unvcopy} into the gibberish
+{\nl \typ {\ontdoosdecopie}} is simply ridiculous and {\nl \typ
+{\copieeruitgepaktedoos}} is a bit long. The \type {\lower} and \type {\raise} on
+the other hand translate well to \type {\verlaag} and \type {\verhoog}. Keeping
+\type {\relax} untranslated sounds ok to me, because \type {\ontspan} really
+makes a language silly.
+
+\stopsection
+
+\startsection[title=\METAPOST]
+
+The \TEX\ language is driving a macro system while \LUA\ is a procedural
+language. The \METAPOST\ language sits somewhere in between. It is still
+expanding all along but it looks a bit more like a programming language with its
+loops, assignments, conditionals, expressions and (sort of) functions. As a
+consequence some of what I mentioned in the previous section applies here.
+
+Translation of for instance \type {truecorners} into \type {echtehoeken} can give
+the language a bit less serious image. Words like \type {linejoin}, \type
+{linecap} and \type {miterlimit} relate directly to the \POSTSCRIPT\ language so
+translating them also relates to translated \POSTSCRIPT.
+
+The \type {primary}, \type {secundary} keywords can be nicely translated into
+serious counterparts \type {primaire} and \type {secundaire} which are words that
+are not really of Dutch origin anyway. The \type {precontrol} and \type
+{postcontrol} words relate to concepts but even there the verbose \type
+{controlepuntvoor} and \type {controlepuntachter} could do. However \type {punt}
+as translation for \type {point} can be confusing because we also use that for
+\type {period}. Translating \type {controls} and \type {curl} needs some
+imagination. Words like \type {tension} becoming \type {spanning} is still
+acceptable soundwise. However:
+
+\starttyping
+voor i=1 stap 2 tot 10:
+   .....
+eindvanvoor; % or: eindvoor
+\stoptyping
+
+Kind of interesting is translating \type {if} into \type {als} because \type {fi}
+then becomes \type {sla} which is \quote {lettuce} or, when see as verb, \quote
+{hit}. The \type {true} and \type {false} keywords becoming \type {goed} and
+\type {fout} is no problem.
+
+Turning \type {atleast} into \type {opzijnminst} at first sight looks strange but
+actually I can appreciate that one. And {\nl \typ {tussendoortje}} as translation
+of \type {interim}, I can live with that one too as it sounds funny. Concepts
+like \quote {suffixes} need thinking but {\nl \typ {uitdr(ukking)}} or more
+literal {\nl \typ {expr(essie)}} for {\nl \typ {expr(ession)}} are okay. The {\nl
+\typ {expandafter}}, {\nl \typ {scantokens}} and similar keywords share the
+problem with \TEX\ that they relate to concepts that are hard to translate.
+
+The \type {redpart} and similar keywords could be translated into \type
+{rooddeel} but {\nl \typ {roodkanaal}} (meaning \type {redchannel}) might be
+better or maybe {\nl \typ {rodecomponent}}. As with \TEX\ grouping related
+keywords are no problem.
+
+A \type {pencircle} becomes \type {pencirkel}, \type {odd} becomes \type
+{oneven}, \type {reverse} becomes {\nl \typ {omgekeerd}} (or {\nl \typ
+{andersom}} or {\nl \typ {tegengesteld}}). For \type {length} we use \type
+{lengte}, and so on. All these sound professional enough, just like \quote
+{corner} related keywords becoming \quote {hoek}, although there a clash with
+\quote {angle} is possible. I'm less sure about \type {clipped} becoming {\nl
+\typ {afgeknepen}} or {\nl \typ {begrensd}} but \type {bounded} then needs some
+thinking as these all are more or less the same. The concept of \quote {stroke}
+maps onto \quote {tekenen} or \quote {vegen} but lucky us that one is not really
+used, contrary to \type {draw} that can map onto \type {teken}, while \type
+{fill} and \type {vul} match well too I guess.
+
+The transformations are no problem but I'd use a directive instead: \type
+{rotated} or \type {roteer}, \type {slanted} or \type {schuin}, \type {scaled} or
+\type {schaal}, and \type {transform} or {\nl \typ {transformeer}}. As you can
+see, these have a reasonable word length too.
+
+The concept of a \type {picture} is known in Dutch as \type {plaatje} or \type
+{tekening}: not an easy choice. Using \type {kleur} for \type {color} is no
+problem at all. A coordinate \type {pair} becomes a \type {paar}: close enough
+not to give subjective side effects. The \type {inner} and \type {outer} keywords
+translate well to \type {binnen} and \type {buiten} but in code it might look a
+bit strange.
+
+So, in general, the translated commands are not that weird but still a graphic
+defined in Dutch keywords instead of English to me might look less serious.
+
+\stopsection
+
+\startsection[title=\LUA]
+
+We now arrived at a more traditional programming language. The \LUA\ language
+only has a few keywords. I suppose that it's just a matter of time before one
+gets accustomed to \typ {als ... dan ... anders ... eind} instead of \typ {if ...
+then ... else ... end}. The loops also translate rather well: \typ {zolang ...
+doe}, \typ {herhaal .. totdat}, \typ {voor ... in ... doe ... einde} are all not
+that verbose. Also, with proper syntax highlighting they stand out and become
+abstract words. But because examples for kids are normally in Dutch, using a
+Dutch programming language might give a toy language feeling.
+
+The \type {local} directive is a bit of a problem because it should be \typ
+{lokale variabele} in order to sound ok in a sentence. The \type {goto} should
+become \type {ganaar} which is also two words with no space in between. The \type
+{function} keyword can become \type {functie}. A \type {coroutine} is a challenge
+(also conceptually); we do have \type {routine} but how about the \type {co}
+part?
+
+Because \LUA\ is such a clean language it doesn't really end up bad. In \CCODE\
+there are some more issues due to the abbreviated \type {struct}, \type {int},
+\type {char}, \type {enum} and \type {typedef}. A literal translation of \type
+{void} to \type {leegte} to me sounds a bit strange. What to do with \type
+{unsigned}? Coming up with something (short) Dutch for \type {return} is not easy
+either. Translating \type {switch} into \type {schakelaar} looks like a bad idea
+but after consulting Taco using \type {keuze} came up. The \type {break} then can
+be \type {klaar} which roundtrips to \quote {finished} and \type {default} can be
+\type {anders} which roundtrips to \quote {otherwise} which is indeed what some
+languages provide.. But, there are programming languages out there that have
+plenty keywords and that are more challenging. But as I'm a happy \LUA\ user I
+don't have to worry about them.
+
+\stopsection
+
+\startsection[title=Conclusion]
+
+Looking at a program source in Dutch the general feeling probably will be
+different. A low level bit of \TEX\ is the worst. For \METAPOST\ it's bearable
+and for \LUA\ it is kind of okay. But in all cases, I'm not convinced that it
+would give me the same feeling. The abstraction of the language due to it not
+being my native tongue makes a difference. This problem is not much different
+than what we have with popular music and songs: for non|-|native speakers it's
+basically sounds, but for a native speaker it is more clear when nonsense is
+sung. The same can happen to me with movies, where watching some scandinavian
+series is different from watching a Dutch one. In the last case one picks up
+different nuances, not necessarily for the best. But it can be worse: post
+synchronized (audio) translations can be pretty unbearable and might compare well
+to programs translated to for instance Dutch. So let's not discuss the way
+Germans would deal with this.
+
+\stopsection
+
+\startsection[title=Side notes]
+
+We now see monospaced fonts showing up that provide ligatures for e.g.\ \type
+{<=} and I've seen examples where ligatures kicked in for \type {fi}. One can
+wonder about that but ligatures are definitely something to keep in mind when
+translating.
+
+The \CONTEXT\ macro package is normally used with the English user interface. But
+the design is such that one can provide different ones too; after all it started
+out Dutch. It is beyond the scope of this musing to discuss the problems with
+translating typographical concepts between languages, especially when there are
+no distinctive words. But it can (and has) been done.
+
+\stopsection
+
+\stopchapter
+
+\stopcomponent
diff --git a/doc/context/sources/general/manuals/musings/musings.tex b/doc/context/sources/general/manuals/musings/musings.tex
index 64d505df1..687fcdb50 100644
--- a/doc/context/sources/general/manuals/musings/musings.tex
+++ b/doc/context/sources/general/manuals/musings/musings.tex
@@ -16,8 +16,11 @@
     \component musings-staygo
     \component musings-stability
     \component musings-roadmap
-  % \component musings-names
+    \component musings-names
     \component musings-plain
+  % \component musings-performance
+  % \component musings-history
+  % \component musings-treasures
 \stopbodymatter
 
 \stopproduct
diff --git a/scripts/context/lua/mtx-install.lua b/scripts/context/lua/mtx-install.lua
index 095ded2d6..b9b410353 100644
--- a/scripts/context/lua/mtx-install.lua
+++ b/scripts/context/lua/mtx-install.lua
@@ -194,6 +194,8 @@ end
 
 function install.update()
 
+    local hashdata = sha2 and sha2.HASH256 or md5.hex
+
     local function validdir(d)
         local ok = isdir(d)
         if not ok then
@@ -203,7 +205,7 @@ function install.update()
         return ok
     end
 
-    local function download(what,url,target,total,done)
+    local function download(what,url,target,total,done,oldhash)
         local data = fetch(url .. "/" .. target)
         if data then
             if total and done then
@@ -211,11 +213,15 @@ function install.update()
             else
                 report("%-8s : %8i : %s",what,#data,target)
             end
-            if validdir(dirname(target)) then
-                savedata(target,data)
+            if oldhash and oldhash ~= hashdata(data) then
+                return "different hash value"
+            elseif not validdir(dirname(target)) then
+                return "wrong target directory"
             else
-                -- message
+                savedata(target,data)
             end
+        else
+            return "unable to download"
         end
     end
 
@@ -364,7 +370,12 @@ function install.update()
                     if action then
                         local size = newhash[2]
                         total = total + size
-                        todo[#todo+1] = { action, target, size }
+                        todo[#todo+1] = {
+                            action = action,
+                            target = target,
+                            size   = size,
+                            hash   = newhash[3],
+                        }
                     end
                 else
                     report("skipping %s",target)
@@ -375,8 +386,22 @@ function install.update()
 
             for i=1,count do
                 local entry = todo[i]
-                download(entry[1],url,entry[2],total,done)
-                done = done + entry[3]
+                for i=1,5 do
+                    local target  = entry.target
+                    local message = download(entry.action,url,target,total,done,entry.hash)
+                    if message then
+                        if i == 5 then
+                            report("%s, try again later: %s",target)
+                            os.exit()
+                        else
+                            report("%s, trying again: %s",target)
+                            os.sleep(2)
+                        end
+                    else
+                        break
+                    end
+                end
+                done = done + entry.size
             end
 
             for oldname, oldhash in sortedhash(hold) do
diff --git a/scripts/context/lua/mtx-update.lua b/scripts/context/lua/mtx-update.lua
index 0462313d6..e03012901 100644
--- a/scripts/context/lua/mtx-update.lua
+++ b/scripts/context/lua/mtx-update.lua
@@ -98,13 +98,6 @@ update.repositories = {
     "experimental"
 }
 
--- more options than just these two are available (no idea why this is here)
-
-update.versions = {
-    "current",
-    "latest"
-}
-
 -- list of basic folders that are needed to make a functional distribution
 
 update.base = {
@@ -684,7 +677,7 @@ if scripts.savestate then
 
     local valid = table.tohash(update.repositories)
     for r in gmatch(environment.argument("repository") or "current","([^, ]+)") do
-        if valid[r] then states.set("repositories." .. r, true) end
+        if valid[r] then states.set("   ." .. r, true) end
     end
 
     local valid = update.engines
diff --git a/scripts/context/lua/mtxrun.lua b/scripts/context/lua/mtxrun.lua
index 15e99eb91..5907fa33c 100644
--- a/scripts/context/lua/mtxrun.lua
+++ b/scripts/context/lua/mtxrun.lua
@@ -8562,7 +8562,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["util-sac"] = package.loaded["util-sac"] or true
 
--- original size: 12898, stripped down to: 9275
+-- original size: 12946, stripped down to: 9507
 
 if not modules then modules={} end modules ['util-sac']={
  version=1.001,
@@ -8790,9 +8790,9 @@ function streams.readfixed2(f)
  f[2]=j+1
  local a,b=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((a-0x100).."."..b)
+  return tonumber((a-0x100).."."..b) or 0
  else
-  tonumber((a  ).."."..b)
+  return tonumber((a  ).."."..b) or 0
  end
 end
 function streams.readfixed4(f)
@@ -8801,9 +8801,9 @@ function streams.readfixed4(f)
  f[2]=j+1
  local a,b,c,d=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((0x100*a+b-0x10000).."."..(0x100*c+d))
+  return tonumber((0x100*a+b-0x10000).."."..(0x100*c+d)) or 0
  else
-  tonumber((0x100*a+b    ).."."..(0x100*c+d))
+  return tonumber((0x100*a+b    ).."."..(0x100*c+d)) or 0
  end
 end
 if bit32 then
@@ -8883,6 +8883,16 @@ if sio and sio.readcardinal2 then
   f[2]=i+4
   return readinteger4(f[1],i)
  end
+ function streams.readfixed2(f) 
+  local i=f[2]
+  f[2]=i+2
+  return readfixed2(f[1],i)
+ end
+ function streams.readfixed4(f) 
+  local i=f[2]
+  f[2]=i+4
+  return readfixed4(f[1],i)
+ end
  function streams.read2dot4(f)
   local i=f[2]
   f[2]=i+2
@@ -13951,7 +13961,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["trac-inf"] = package.loaded["trac-inf"] or true
 
--- original size: 9904, stripped down to: 6712
+-- original size: 9973, stripped down to: 7492
 
 if not modules then modules={} end modules ['trac-inf']={
  version=1.001,
@@ -13985,6 +13995,36 @@ local function resettiming(instance)
 end
 local ticks=clock
 local seconds=function(n) return n or 0 end
+if lua.getpreciseticks then
+ ticks=lua.getpreciseticks
+ seconds=lua.getpreciseseconds
+elseif FFISUPPORTED and ffi and os.type=="windows" then
+ local okay,kernel=pcall(ffi.load,"kernel32")
+ if kernel then
+  local tonumber=ffi.number or tonumber
+  ffi.cdef[[
+            int QueryPerformanceFrequency(int64_t *lpFrequency);
+            int QueryPerformanceCounter(int64_t *lpPerformanceCount);
+        ]]
+  local target=ffi.new("__int64[1]")
+  ticks=function()
+   if kernel.QueryPerformanceCounter(target)==1 then
+    return tonumber(target[0])
+   else
+    return 0
+   end
+  end
+  local target=ffi.new("__int64[1]")
+  seconds=function(ticks)
+   if kernel.QueryPerformanceFrequency(target)==1 then
+    return ticks/tonumber(target[0])
+   else
+    return 0
+   end
+  end
+ end
+else
+end
 local function starttiming(instance,reset)
  local timer=timers[instance or "notimer"]
  local it=timer.timing
@@ -26077,8 +26117,8 @@ end -- of closure
 
 -- used libraries    : l-bit32.lua l-lua.lua l-macro.lua l-sandbox.lua l-package.lua l-lpeg.lua l-function.lua l-string.lua l-table.lua l-io.lua l-number.lua l-set.lua l-os.lua l-file.lua l-gzip.lua l-md5.lua l-sha.lua l-url.lua l-dir.lua l-boolean.lua l-unicode.lua l-math.lua util-str.lua util-tab.lua util-fil.lua util-sac.lua util-sto.lua util-prs.lua util-fmt.lua util-soc-imp-reset.lua util-soc-imp-socket.lua util-soc-imp-copas.lua util-soc-imp-ltn12.lua util-soc-imp-mime.lua util-soc-imp-url.lua util-soc-imp-headers.lua util-soc-imp-tp.lua util-soc-imp-http.lua util-soc-imp-ftp.lua util-soc-imp-smtp.lua trac-set.lua trac-log.lua trac-inf.lua trac-pro.lua util-lua.lua util-deb.lua util-tpl.lua util-sbx.lua util-mrg.lua util-env.lua luat-env.lua util-zip.lua lxml-tab.lua lxml-lpt.lua lxml-mis.lua lxml-aux.lua lxml-xml.lua trac-xml.lua data-ini.lua data-exp.lua data-env.lua data-tmp.lua data-met.lua data-res.lua data-pre.lua data-inp.lua data-out.lua data-fil.lua data-con.lua data-use.lua data-zip.lua data-tre.lua data-sch.lua data-lua.lua data-aux.lua data-tmf.lua data-lst.lua libs-ini.lua luat-sta.lua luat-fmt.lua
 -- skipped libraries : -
--- original bytes    : 1038128
--- stripped bytes    : 410736
+-- original bytes    : 1038245
+-- stripped bytes    : 409841
 
 -- end library merge
 
diff --git a/scripts/context/stubs/mswin/mtxrun.lua b/scripts/context/stubs/mswin/mtxrun.lua
index 15e99eb91..5907fa33c 100644
--- a/scripts/context/stubs/mswin/mtxrun.lua
+++ b/scripts/context/stubs/mswin/mtxrun.lua
@@ -8562,7 +8562,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["util-sac"] = package.loaded["util-sac"] or true
 
--- original size: 12898, stripped down to: 9275
+-- original size: 12946, stripped down to: 9507
 
 if not modules then modules={} end modules ['util-sac']={
  version=1.001,
@@ -8790,9 +8790,9 @@ function streams.readfixed2(f)
  f[2]=j+1
  local a,b=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((a-0x100).."."..b)
+  return tonumber((a-0x100).."."..b) or 0
  else
-  tonumber((a  ).."."..b)
+  return tonumber((a  ).."."..b) or 0
  end
 end
 function streams.readfixed4(f)
@@ -8801,9 +8801,9 @@ function streams.readfixed4(f)
  f[2]=j+1
  local a,b,c,d=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((0x100*a+b-0x10000).."."..(0x100*c+d))
+  return tonumber((0x100*a+b-0x10000).."."..(0x100*c+d)) or 0
  else
-  tonumber((0x100*a+b    ).."."..(0x100*c+d))
+  return tonumber((0x100*a+b    ).."."..(0x100*c+d)) or 0
  end
 end
 if bit32 then
@@ -8883,6 +8883,16 @@ if sio and sio.readcardinal2 then
   f[2]=i+4
   return readinteger4(f[1],i)
  end
+ function streams.readfixed2(f) 
+  local i=f[2]
+  f[2]=i+2
+  return readfixed2(f[1],i)
+ end
+ function streams.readfixed4(f) 
+  local i=f[2]
+  f[2]=i+4
+  return readfixed4(f[1],i)
+ end
  function streams.read2dot4(f)
   local i=f[2]
   f[2]=i+2
@@ -13951,7 +13961,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["trac-inf"] = package.loaded["trac-inf"] or true
 
--- original size: 9904, stripped down to: 6712
+-- original size: 9973, stripped down to: 7492
 
 if not modules then modules={} end modules ['trac-inf']={
  version=1.001,
@@ -13985,6 +13995,36 @@ local function resettiming(instance)
 end
 local ticks=clock
 local seconds=function(n) return n or 0 end
+if lua.getpreciseticks then
+ ticks=lua.getpreciseticks
+ seconds=lua.getpreciseseconds
+elseif FFISUPPORTED and ffi and os.type=="windows" then
+ local okay,kernel=pcall(ffi.load,"kernel32")
+ if kernel then
+  local tonumber=ffi.number or tonumber
+  ffi.cdef[[
+            int QueryPerformanceFrequency(int64_t *lpFrequency);
+            int QueryPerformanceCounter(int64_t *lpPerformanceCount);
+        ]]
+  local target=ffi.new("__int64[1]")
+  ticks=function()
+   if kernel.QueryPerformanceCounter(target)==1 then
+    return tonumber(target[0])
+   else
+    return 0
+   end
+  end
+  local target=ffi.new("__int64[1]")
+  seconds=function(ticks)
+   if kernel.QueryPerformanceFrequency(target)==1 then
+    return ticks/tonumber(target[0])
+   else
+    return 0
+   end
+  end
+ end
+else
+end
 local function starttiming(instance,reset)
  local timer=timers[instance or "notimer"]
  local it=timer.timing
@@ -26077,8 +26117,8 @@ end -- of closure
 
 -- used libraries    : l-bit32.lua l-lua.lua l-macro.lua l-sandbox.lua l-package.lua l-lpeg.lua l-function.lua l-string.lua l-table.lua l-io.lua l-number.lua l-set.lua l-os.lua l-file.lua l-gzip.lua l-md5.lua l-sha.lua l-url.lua l-dir.lua l-boolean.lua l-unicode.lua l-math.lua util-str.lua util-tab.lua util-fil.lua util-sac.lua util-sto.lua util-prs.lua util-fmt.lua util-soc-imp-reset.lua util-soc-imp-socket.lua util-soc-imp-copas.lua util-soc-imp-ltn12.lua util-soc-imp-mime.lua util-soc-imp-url.lua util-soc-imp-headers.lua util-soc-imp-tp.lua util-soc-imp-http.lua util-soc-imp-ftp.lua util-soc-imp-smtp.lua trac-set.lua trac-log.lua trac-inf.lua trac-pro.lua util-lua.lua util-deb.lua util-tpl.lua util-sbx.lua util-mrg.lua util-env.lua luat-env.lua util-zip.lua lxml-tab.lua lxml-lpt.lua lxml-mis.lua lxml-aux.lua lxml-xml.lua trac-xml.lua data-ini.lua data-exp.lua data-env.lua data-tmp.lua data-met.lua data-res.lua data-pre.lua data-inp.lua data-out.lua data-fil.lua data-con.lua data-use.lua data-zip.lua data-tre.lua data-sch.lua data-lua.lua data-aux.lua data-tmf.lua data-lst.lua libs-ini.lua luat-sta.lua luat-fmt.lua
 -- skipped libraries : -
--- original bytes    : 1038128
--- stripped bytes    : 410736
+-- original bytes    : 1038245
+-- stripped bytes    : 409841
 
 -- end library merge
 
diff --git a/scripts/context/stubs/unix/mtxrun b/scripts/context/stubs/unix/mtxrun
index 15e99eb91..5907fa33c 100644
--- a/scripts/context/stubs/unix/mtxrun
+++ b/scripts/context/stubs/unix/mtxrun
@@ -8562,7 +8562,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["util-sac"] = package.loaded["util-sac"] or true
 
--- original size: 12898, stripped down to: 9275
+-- original size: 12946, stripped down to: 9507
 
 if not modules then modules={} end modules ['util-sac']={
  version=1.001,
@@ -8790,9 +8790,9 @@ function streams.readfixed2(f)
  f[2]=j+1
  local a,b=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((a-0x100).."."..b)
+  return tonumber((a-0x100).."."..b) or 0
  else
-  tonumber((a  ).."."..b)
+  return tonumber((a  ).."."..b) or 0
  end
 end
 function streams.readfixed4(f)
@@ -8801,9 +8801,9 @@ function streams.readfixed4(f)
  f[2]=j+1
  local a,b,c,d=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((0x100*a+b-0x10000).."."..(0x100*c+d))
+  return tonumber((0x100*a+b-0x10000).."."..(0x100*c+d)) or 0
  else
-  tonumber((0x100*a+b    ).."."..(0x100*c+d))
+  return tonumber((0x100*a+b    ).."."..(0x100*c+d)) or 0
  end
 end
 if bit32 then
@@ -8883,6 +8883,16 @@ if sio and sio.readcardinal2 then
   f[2]=i+4
   return readinteger4(f[1],i)
  end
+ function streams.readfixed2(f) 
+  local i=f[2]
+  f[2]=i+2
+  return readfixed2(f[1],i)
+ end
+ function streams.readfixed4(f) 
+  local i=f[2]
+  f[2]=i+4
+  return readfixed4(f[1],i)
+ end
  function streams.read2dot4(f)
   local i=f[2]
   f[2]=i+2
@@ -13951,7 +13961,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["trac-inf"] = package.loaded["trac-inf"] or true
 
--- original size: 9904, stripped down to: 6712
+-- original size: 9973, stripped down to: 7492
 
 if not modules then modules={} end modules ['trac-inf']={
  version=1.001,
@@ -13985,6 +13995,36 @@ local function resettiming(instance)
 end
 local ticks=clock
 local seconds=function(n) return n or 0 end
+if lua.getpreciseticks then
+ ticks=lua.getpreciseticks
+ seconds=lua.getpreciseseconds
+elseif FFISUPPORTED and ffi and os.type=="windows" then
+ local okay,kernel=pcall(ffi.load,"kernel32")
+ if kernel then
+  local tonumber=ffi.number or tonumber
+  ffi.cdef[[
+            int QueryPerformanceFrequency(int64_t *lpFrequency);
+            int QueryPerformanceCounter(int64_t *lpPerformanceCount);
+        ]]
+  local target=ffi.new("__int64[1]")
+  ticks=function()
+   if kernel.QueryPerformanceCounter(target)==1 then
+    return tonumber(target[0])
+   else
+    return 0
+   end
+  end
+  local target=ffi.new("__int64[1]")
+  seconds=function(ticks)
+   if kernel.QueryPerformanceFrequency(target)==1 then
+    return ticks/tonumber(target[0])
+   else
+    return 0
+   end
+  end
+ end
+else
+end
 local function starttiming(instance,reset)
  local timer=timers[instance or "notimer"]
  local it=timer.timing
@@ -26077,8 +26117,8 @@ end -- of closure
 
 -- used libraries    : l-bit32.lua l-lua.lua l-macro.lua l-sandbox.lua l-package.lua l-lpeg.lua l-function.lua l-string.lua l-table.lua l-io.lua l-number.lua l-set.lua l-os.lua l-file.lua l-gzip.lua l-md5.lua l-sha.lua l-url.lua l-dir.lua l-boolean.lua l-unicode.lua l-math.lua util-str.lua util-tab.lua util-fil.lua util-sac.lua util-sto.lua util-prs.lua util-fmt.lua util-soc-imp-reset.lua util-soc-imp-socket.lua util-soc-imp-copas.lua util-soc-imp-ltn12.lua util-soc-imp-mime.lua util-soc-imp-url.lua util-soc-imp-headers.lua util-soc-imp-tp.lua util-soc-imp-http.lua util-soc-imp-ftp.lua util-soc-imp-smtp.lua trac-set.lua trac-log.lua trac-inf.lua trac-pro.lua util-lua.lua util-deb.lua util-tpl.lua util-sbx.lua util-mrg.lua util-env.lua luat-env.lua util-zip.lua lxml-tab.lua lxml-lpt.lua lxml-mis.lua lxml-aux.lua lxml-xml.lua trac-xml.lua data-ini.lua data-exp.lua data-env.lua data-tmp.lua data-met.lua data-res.lua data-pre.lua data-inp.lua data-out.lua data-fil.lua data-con.lua data-use.lua data-zip.lua data-tre.lua data-sch.lua data-lua.lua data-aux.lua data-tmf.lua data-lst.lua libs-ini.lua luat-sta.lua luat-fmt.lua
 -- skipped libraries : -
--- original bytes    : 1038128
--- stripped bytes    : 410736
+-- original bytes    : 1038245
+-- stripped bytes    : 409841
 
 -- end library merge
 
diff --git a/scripts/context/stubs/win64/mtxrun.lua b/scripts/context/stubs/win64/mtxrun.lua
index 15e99eb91..5907fa33c 100644
--- a/scripts/context/stubs/win64/mtxrun.lua
+++ b/scripts/context/stubs/win64/mtxrun.lua
@@ -8562,7 +8562,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["util-sac"] = package.loaded["util-sac"] or true
 
--- original size: 12898, stripped down to: 9275
+-- original size: 12946, stripped down to: 9507
 
 if not modules then modules={} end modules ['util-sac']={
  version=1.001,
@@ -8790,9 +8790,9 @@ function streams.readfixed2(f)
  f[2]=j+1
  local a,b=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((a-0x100).."."..b)
+  return tonumber((a-0x100).."."..b) or 0
  else
-  tonumber((a  ).."."..b)
+  return tonumber((a  ).."."..b) or 0
  end
 end
 function streams.readfixed4(f)
@@ -8801,9 +8801,9 @@ function streams.readfixed4(f)
  f[2]=j+1
  local a,b,c,d=byte(f[1],i,j)
  if a>=0x80 then
-  tonumber((0x100*a+b-0x10000).."."..(0x100*c+d))
+  return tonumber((0x100*a+b-0x10000).."."..(0x100*c+d)) or 0
  else
-  tonumber((0x100*a+b    ).."."..(0x100*c+d))
+  return tonumber((0x100*a+b    ).."."..(0x100*c+d)) or 0
  end
 end
 if bit32 then
@@ -8883,6 +8883,16 @@ if sio and sio.readcardinal2 then
   f[2]=i+4
   return readinteger4(f[1],i)
  end
+ function streams.readfixed2(f) 
+  local i=f[2]
+  f[2]=i+2
+  return readfixed2(f[1],i)
+ end
+ function streams.readfixed4(f) 
+  local i=f[2]
+  f[2]=i+4
+  return readfixed4(f[1],i)
+ end
  function streams.read2dot4(f)
   local i=f[2]
   f[2]=i+2
@@ -13951,7 +13961,7 @@ do -- create closure to overcome 200 locals limit
 
 package.loaded["trac-inf"] = package.loaded["trac-inf"] or true
 
--- original size: 9904, stripped down to: 6712
+-- original size: 9973, stripped down to: 7492
 
 if not modules then modules={} end modules ['trac-inf']={
  version=1.001,
@@ -13985,6 +13995,36 @@ local function resettiming(instance)
 end
 local ticks=clock
 local seconds=function(n) return n or 0 end
+if lua.getpreciseticks then
+ ticks=lua.getpreciseticks
+ seconds=lua.getpreciseseconds
+elseif FFISUPPORTED and ffi and os.type=="windows" then
+ local okay,kernel=pcall(ffi.load,"kernel32")
+ if kernel then
+  local tonumber=ffi.number or tonumber
+  ffi.cdef[[
+            int QueryPerformanceFrequency(int64_t *lpFrequency);
+            int QueryPerformanceCounter(int64_t *lpPerformanceCount);
+        ]]
+  local target=ffi.new("__int64[1]")
+  ticks=function()
+   if kernel.QueryPerformanceCounter(target)==1 then
+    return tonumber(target[0])
+   else
+    return 0
+   end
+  end
+  local target=ffi.new("__int64[1]")
+  seconds=function(ticks)
+   if kernel.QueryPerformanceFrequency(target)==1 then
+    return ticks/tonumber(target[0])
+   else
+    return 0
+   end
+  end
+ end
+else
+end
 local function starttiming(instance,reset)
  local timer=timers[instance or "notimer"]
  local it=timer.timing
@@ -26077,8 +26117,8 @@ end -- of closure
 
 -- used libraries    : l-bit32.lua l-lua.lua l-macro.lua l-sandbox.lua l-package.lua l-lpeg.lua l-function.lua l-string.lua l-table.lua l-io.lua l-number.lua l-set.lua l-os.lua l-file.lua l-gzip.lua l-md5.lua l-sha.lua l-url.lua l-dir.lua l-boolean.lua l-unicode.lua l-math.lua util-str.lua util-tab.lua util-fil.lua util-sac.lua util-sto.lua util-prs.lua util-fmt.lua util-soc-imp-reset.lua util-soc-imp-socket.lua util-soc-imp-copas.lua util-soc-imp-ltn12.lua util-soc-imp-mime.lua util-soc-imp-url.lua util-soc-imp-headers.lua util-soc-imp-tp.lua util-soc-imp-http.lua util-soc-imp-ftp.lua util-soc-imp-smtp.lua trac-set.lua trac-log.lua trac-inf.lua trac-pro.lua util-lua.lua util-deb.lua util-tpl.lua util-sbx.lua util-mrg.lua util-env.lua luat-env.lua util-zip.lua lxml-tab.lua lxml-lpt.lua lxml-mis.lua lxml-aux.lua lxml-xml.lua trac-xml.lua data-ini.lua data-exp.lua data-env.lua data-tmp.lua data-met.lua data-res.lua data-pre.lua data-inp.lua data-out.lua data-fil.lua data-con.lua data-use.lua data-zip.lua data-tre.lua data-sch.lua data-lua.lua data-aux.lua data-tmf.lua data-lst.lua libs-ini.lua luat-sta.lua luat-fmt.lua
 -- skipped libraries : -
--- original bytes    : 1038128
--- stripped bytes    : 410736
+-- original bytes    : 1038245
+-- stripped bytes    : 409841
 
 -- end library merge
 
diff --git a/tex/context/base/mkii/cont-new.mkii b/tex/context/base/mkii/cont-new.mkii
index 8570ac7a9..682160a36 100644
--- a/tex/context/base/mkii/cont-new.mkii
+++ b/tex/context/base/mkii/cont-new.mkii
@@ -11,7 +11,7 @@
 %C therefore copyrighted by \PRAGMA. See mreadme.pdf for
 %C details.
 
-\newcontextversion{2020.02.11 16:36}
+\newcontextversion{2020.02.17 12:06}
 
 %D This file is loaded at runtime, thereby providing an
 %D excellent place for hacks, patches, extensions and new
diff --git a/tex/context/base/mkii/context.mkii b/tex/context/base/mkii/context.mkii
index e02bc12dd..bc6869fec 100644
--- a/tex/context/base/mkii/context.mkii
+++ b/tex/context/base/mkii/context.mkii
@@ -20,7 +20,7 @@
 %D your styles an modules.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2020.02.11 16:36}
+\edef\contextversion{2020.02.17 12:06}
 
 %D For those who want to use this:
 
diff --git a/tex/context/base/mkiv/cont-log.mkiv b/tex/context/base/mkiv/cont-log.mkiv
index 1fd0cc4d4..75d87eb81 100644
--- a/tex/context/base/mkiv/cont-log.mkiv
+++ b/tex/context/base/mkiv/cont-log.mkiv
@@ -52,7 +52,7 @@
    \begingroup
    \setbox\scratchbox\hbox{L}%
    \scratchdimen\ht\scratchbox
-   \setbox\scratchbox\hbox{\txx A}%
+   \setbox\scratchbox\hbox{\doresetattribute{case}\txx A}%
    L\kern-.55\wd\scratchbox
    \raise\scratchdimen\hbox{\lower\ht\scratchbox\copy\scratchbox}%
    \kern-.2\wd\scratchbox\TeX
diff --git a/tex/context/base/mkiv/cont-new.mkiv b/tex/context/base/mkiv/cont-new.mkiv
index cd700391a..97d5d2071 100644
--- a/tex/context/base/mkiv/cont-new.mkiv
+++ b/tex/context/base/mkiv/cont-new.mkiv
@@ -13,7 +13,7 @@
 
 % \normalend % uncomment this to get the real base runtime
 
-\newcontextversion{2020.02.11 16:36}
+\newcontextversion{2020.02.17 12:06}
 
 %D This file is loaded at runtime, thereby providing an excellent place for
 %D hacks, patches, extensions and new features.
diff --git a/tex/context/base/mkiv/context.mkiv b/tex/context/base/mkiv/context.mkiv
index 30389e598..9cdb78c47 100644
--- a/tex/context/base/mkiv/context.mkiv
+++ b/tex/context/base/mkiv/context.mkiv
@@ -45,7 +45,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2020.02.11 16:36}
+\edef\contextversion{2020.02.17 12:06}
 \edef\contextkind   {beta}
 
 %D Kind of special:
diff --git a/tex/context/base/mkiv/context.mkxl b/tex/context/base/mkiv/context.mkxl
index ef3fddc3d..5cb85c4cd 100644
--- a/tex/context/base/mkiv/context.mkxl
+++ b/tex/context/base/mkiv/context.mkxl
@@ -29,7 +29,7 @@
 %D {YYYY.MM.DD HH:MM} format.
 
 \edef\contextformat {\jobname}
-\edef\contextversion{2020.02.11 16:36}
+\edef\contextversion{2020.02.17 12:06}
 \edef\contextkind   {beta}
 
 %D Kind of special:
diff --git a/tex/context/base/mkiv/font-cff.lua b/tex/context/base/mkiv/font-cff.lua
index 5f79ba7a3..72b0a038f 100644
--- a/tex/context/base/mkiv/font-cff.lua
+++ b/tex/context/base/mkiv/font-cff.lua
@@ -184,6 +184,15 @@ local cffreaders = {
     readulong,
 }
 
+directives.register("fonts.streamreader",function()
+    cffreaders = {
+        readbyte,
+        readushort,
+        readuint,
+        readulong,
+    }
+end)
+
 -- The header contains information about its own size.
 
 local function readheader(f)
diff --git a/tex/context/base/mkiv/lpdf-wid.lua b/tex/context/base/mkiv/lpdf-wid.lua
index 8e0a45a00..106eb98cc 100644
--- a/tex/context/base/mkiv/lpdf-wid.lua
+++ b/tex/context/base/mkiv/lpdf-wid.lua
@@ -347,13 +347,12 @@ function codeinjections.embedfile(specification)
             f = pdfflushstreamobject(data,a)
             specification.data = true -- signal that still data but already flushed
         else
+            local attributes   = lfs.attributes(foundname)
             local modification = modificationtime(foundname)
-            if attributes then
-                a.Params = {
-                    Size    = attributes.size,
-                    ModDate = lpdf.pdftimestamp(modification),
-                }
-            end
+            a.Params = {
+                Size    = attributes.size,
+                ModDate = lpdf.pdftimestamp(modification),
+            }
             f = pdfflushstreamfileobject(foundname,a,compress)
         end
         local d = pdfdictionary {
@@ -449,7 +448,7 @@ function nodeinjections.attachfile(specification)
                 AP       = appearance,
                 OC       = analyzelayer(specification.layer),
              -- F        = pdfnull(), -- another rediculous need to satisfy validation
-                F        = (flags | 4) & (1023-1-2-32-256), -- set 3, clear 1,2,6,9; PDF 32000-1, p385
+                F        = bit32.band(bit32.bor(flags,4),(1023-1-2-32-256)), -- set 3, clear 1,2,6,9; PDF 32000-1, p385
             }
             local width  = specification.width  or 0
             local height = specification.height or 0
diff --git a/tex/context/base/mkiv/status-files.pdf b/tex/context/base/mkiv/status-files.pdf
index e5fe90ad2..baed04d32 100644
--- a/tex/context/base/mkiv/status-files.pdf
+++ b/tex/context/base/mkiv/status-files.pdf
diff --git a/tex/context/base/mkiv/status-lua.pdf b/tex/context/base/mkiv/status-lua.pdf
index ac49b2139..9e63b48f6 100644
--- a/tex/context/base/mkiv/status-lua.pdf
+++ b/tex/context/base/mkiv/status-lua.pdf
diff --git a/tex/context/base/mkiv/trac-inf.lua b/tex/context/base/mkiv/trac-inf.lua
index 24ebc5249..40dfe854e 100644
--- a/tex/context/base/mkiv/trac-inf.lua
+++ b/tex/context/base/mkiv/trac-inf.lua
@@ -45,42 +45,52 @@ end
 local ticks   = clock
 local seconds = function(n) return n or 0 end
 
--- if FFISUPPORTED and ffi and os.type == "windows" then
---
---     local okay, kernel = pcall(ffi.load,"kernel32")
---
---     if kernel then
---
---         local tonumber = ffi.number or tonumber
---
---         ffi.cdef[[
---             int QueryPerformanceFrequency(int64_t *lpFrequency);
---             int QueryPerformanceCounter(int64_t *lpPerformanceCount);
---         ]]
---
---         local target = ffi.new("__int64[1]")
---
---         ticks = function()
---             if kernel.QueryPerformanceCounter(target) == 1 then
---                 return tonumber(target[0])
---             else
---                 return 0
---             end
---         end
---
---         local target = ffi.new("__int64[1]")
---
---         seconds = function(ticks)
---             if kernel.QueryPerformanceFrequency(target) == 1 then
---                 return ticks / tonumber(target[0])
---             else
---                 return 0
---             end
---         end
---
---     end
---
--- end
+if lua.getpreciseticks then
+
+    ticks   = lua.getpreciseticks
+    seconds = lua.getpreciseseconds
+
+elseif FFISUPPORTED and ffi and os.type == "windows" then
+
+    local okay, kernel = pcall(ffi.load,"kernel32")
+
+    if kernel then
+
+        local tonumber = ffi.number or tonumber
+
+        ffi.cdef[[
+            int QueryPerformanceFrequency(int64_t *lpFrequency);
+            int QueryPerformanceCounter(int64_t *lpPerformanceCount);
+        ]]
+
+        local target = ffi.new("__int64[1]")
+
+        ticks = function()
+            if kernel.QueryPerformanceCounter(target) == 1 then
+                return tonumber(target[0])
+            else
+                return 0
+            end
+        end
+
+        local target = ffi.new("__int64[1]")
+
+        seconds = function(ticks)
+            if kernel.QueryPerformanceFrequency(target) == 1 then
+                return ticks / tonumber(target[0])
+            else
+                return 0
+            end
+        end
+
+    end
+
+else
+
+    -- excessive timing costs some 1-2 percent runtime
+
+end
+
 
 local function starttiming(instance,reset)
     local timer = timers[instance or "notimer"]
diff --git a/tex/context/base/mkiv/util-sac.lua b/tex/context/base/mkiv/util-sac.lua
index 19dc0eb0f..47c753ab1 100644
--- a/tex/context/base/mkiv/util-sac.lua
+++ b/tex/context/base/mkiv/util-sac.lua
@@ -263,9 +263,9 @@ function streams.readfixed2(f)
     f[2] = j + 1
     local a, b = byte(f[1],i,j)
     if a >= 0x80 then
-        tonumber((a - 0x100) .. "." .. b)
+        return tonumber((a - 0x100) .. "." .. b) or 0
     else
-        tonumber((a        ) .. "." .. b)
+        return tonumber((a        ) .. "." .. b) or 0
     end
 end
 
@@ -275,9 +275,9 @@ function streams.readfixed4(f)
     f[2] = j + 1
     local a, b, c, d = byte(f[1],i,j)
     if a >= 0x80 then
-        tonumber((0x100 * a + b - 0x10000) .. "." .. (0x100 * c + d))
+        return tonumber((0x100 * a + b - 0x10000) .. "." .. (0x100 * c + d)) or 0
     else
-        tonumber((0x100 * a + b          ) .. "." .. (0x100 * c + d))
+        return tonumber((0x100 * a + b          ) .. "." .. (0x100 * c + d)) or 0
     end
 end
 
@@ -366,16 +366,16 @@ if sio and sio.readcardinal2 then
         f[2] = i + 4
         return readinteger4(f[1],i)
     end
- -- function streams.readfixed2(f) -- needs recent luatex
- --     local i = f[2]
- --     f[2] = i + 2
- --     return readfixed2(f[1],i)
- -- end
- -- function streams.readfixed4(f) -- needs recent luatex
- --     local i = f[2]
- --     f[2] = i + 4
- --     return readfixed4(f[1],i)
- -- end
+    function streams.readfixed2(f) -- needs recent luatex
+        local i = f[2]
+        f[2] = i + 2
+        return readfixed2(f[1],i)
+    end
+    function streams.readfixed4(f) -- needs recent luatex
+        local i = f[2]
+        f[2] = i + 4
+        return readfixed4(f[1],i)
+    end
     function streams.read2dot4(f)
         local i = f[2]
         f[2] = i + 2
diff --git a/tex/generic/context/luatex/luatex-fonts-merged.lua b/tex/generic/context/luatex/luatex-fonts-merged.lua
index cc61d0a18..41fbe10fd 100644
--- a/tex/generic/context/luatex/luatex-fonts-merged.lua
+++ b/tex/generic/context/luatex/luatex-fonts-merged.lua
@@ -1,6 +1,6 @@
 -- merged file : c:/data/develop/context/sources/luatex-fonts-merged.lua
 -- parent file : c:/data/develop/context/sources/luatex-fonts.lua
--- merge date  : 2020-02-11 16:36
+-- merge date  : 2020-02-17 12:06
 
 do -- begin closure to overcome local limits and interference
 
@@ -14179,6 +14179,14 @@ local cffreaders={
  readuint,
  readulong,
 }
+directives.register("fonts.streamreader",function()
+ cffreaders={
+  readbyte,
+  readushort,
+  readuint,
+  readulong,
+ }
+end)
 local function readheader(f)
  local offset=getposition(f)
  local major=readbyte(f)