[NTG-context] lmtx

Hans Hagen j.hagen at xs4all.nl
Tue Apr 2 22:19:09 CEST 2019


On 4/2/2019 10:11 PM, Henri Menke wrote:
> 
> 
> On 2/04/19 10:05 PM, Hans Hagen wrote:
>> Hi,
>>
>> So, for those who hesitate to check out lmtx, here is some information.
>>
>> - In order to achieve long term stability context will use a lean and
>> mean variant of luatex (although for now context will keep running on
>> luatex too; i might drop support for luajittex). Eventually the source
>> code will be part of the context distribution so that one can always
>> compile a binary that matches an archived context version.
>>
>> - This version also permits us to experiment (even very extreme) without
>> interupting the parent program luatex, which is now used by other macro
>> packages too and therefore needs to be frozen in functionality. Some
>> features might trickle back into luatex eventually (unless it breaks
>> compatibility).
>>
>> - As a direct effect it means that context does a bit more: creating the
>> pdf file (already most is done anyway in mkiv), dealing with font
>> embedding, handling image inclusion, etc. For sure there can be issues
>> with that but it has run on my machine already for quite a while.
>>
>> - It is hard to be conclusive about performance but for instance the
>> luatex manual processes a bit faster with lmtx as does the test suite. A
>> gain in performance on very demanding documents is also observed by Alan
>> and Thomas. Normally one can expect a similar performance. However, the
>> memory footprint could be a bit smaller.
>>
>> - The current somewhat hybrid codebase of context will stepwise be
>> adapted so that at some point we can start experimenting with some
>> pending ideas. (Which is why i sometimes answer "later this year".)
> 
> Where can I find the C sources for the luametatex engine?
nowhere ... as i mentioned these will become part of the context 
distribution around the ctx meeting (when we also have the compile 
infrastructure ready)

what we offer now is an experimental test release

Hans

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