On 26-12-2019 09:02, Wolfgang Schuster wrote:
> 
> Delete the cache and regenerate the format file:
> 
> mtxrun --script cache --erase --make

.
.
.
system          | lua | compiling
'/home/vm/data/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/data/names.tma'
into
'/home/vm/data/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/data/names.tmd'
system          | lua | dumping
'/home/vm/data/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/data/names.tma'
into
'/home/vm/data/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/fonts/data/names.tmd'
stripped






Not much of an improvement yet...

\starttext
\input knuth
\stoptext


$ context ctx.tex

resolvers       | formats | executing runner 'run luametatex format':
/home/vm/data/context/tex/texmf-linux-64/bin/luametatex --jobname="ctx"
--fmt=/home/vm/data/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.fmt
--lua=/home/vm/data/context/tex/texmf-cache/luatex-cache/context/5fe67e0bfe781ce0dde776fb1556f32e/formats/luametatex/cont-en.lui
cont-yes.mkiv --c:currentrun=1 --c:fulljobname="./ctx.tex"
--c:input="./ctx.tex" --c:kindofrun=1 --c:maxnofruns=9
--c:texmfbinpath="/home/vm/data/context/tex/texmf-linux-64/bin"
This is LuaMetaTeX, Version 2.03.5
open source     > level 1, order 1, name 'cont-yes.mkiv'
system          >
system          > ConTeXt  ver: 2019.12.24 20:09 MKIV beta  fmt:
2019.12.26  int: english/english
system          >
system          > 'cont-new.mkiv' loaded
open source     > level 2, order 2, name
'/home/vm/data/context/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv'
system          > beware: some patches loaded from cont-new.mkiv
close source    > level 2, order 2, name
'/home/vm/data/context/tex/texmf-context/tex/context/base/mkiv/cont-new.mkiv'
system          > files > jobname 'ctx', input './ctx', result 'ctx'
fonts           > latin modern fonts are not preloaded
languages       > language 'en' is active
open source     > level 2, order 3, name './ctx.tex'
fonts           > preloading latin modern fonts (second stage)
fonts           > 'fallback modern-designsize rm 12pt' is loaded
open source     > level 3, order 4, name 'knuth.tex'
close source    > level 3, order 4, name 'knuth.tex'
backend         > xmp > using file
'/home/vm/data/context/tex/texmf-context/tex/context/base/mkiv/lpdf-pdx.xml'
pages           > flushing realpage 1, userpage 1, subpage 1
Segmentation fault (core dumped)
mtx-context     | fatal error: return code: 35584