[luatex] LuaTeX precompilation

[Henrik Mannerström]

On Wed, Dec 20, 2023 at 10:02 PM Hans Hagen <j.hagen at xs4all.nl> wrote:

> What if you replace the Hello World by \null and disable page numbers?
>
Minimal example: 2.02s
Remove microtype 1.95s
Remove page number: 1.95s
Remove page content: 1.95s

For me, it does not make much of a difference.


> which means that luatex needs 0.1 sec more when we do real pages?
>
My question has never been about pages per second, but about startup time.
In pdftex, you can make the startup almost instantaneous with a precompiled
format. How feasible would this be in luatex?

- 32 bit fonts with features
> - unicode math
> - 32 bit patterns
>
All this is good, and I understand that loading takes time. Would it be
doable to use a cache or something similar to speed up the loading?

now, what really can slow down is protrusion and expansion (how useful
> and needed are they)? actually expansion in luatex is done a bit
> different (more granular, less font instances, etc) but I;m not sure if
> that adds much,
>
In my example protrusion did not make a significant difference. As for the
usefulness of algorithmic typesetting? I crossed that river a long time
ago. ;)
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