[luatex] LuaTeX precompilation

[luigi scarso]

On Thu, 21 Dec 2023 at 08:55, Henrik Mannerström <
henrik.mannerstrom at gmail.com> wrote:

> On Wed, Dec 20, 2023 at 9:57 PM Hans Hagen <j.hagen at xs4all.nl> wrote:
>
>> Did you time how long loading these packagestakes? Things like fonts
>> always need to be loaded (and a 8 bit font is way smaller than a 32 bit
>> wide font with features). You could try to use latex/luatex with 8 bit
>> fonts.
>>
>
> Without a precompiled format, pdflatex takes 1.2s for my four page
> example. That lualatex takes 2.5s is not that big a difference. What my
> question is about is precompiled formats: If I put everything in the
> preample and precompile it, pdflatex takes only 0.56s. /Here/ is the big
> difference. When I'm typing a typical technical note, I have over the years
> developed a workflow where I use latex + editor as a wysiwyg-setup. With
> two windows: one for the pdf and one for the source, recompile almost once
> for every sentence or equation. /It is here/ where the difference adds up.
> Judging by the other posts sparked by my question, I'm not the only one
> that feels the difference.
>
> I readily admit that luatex is a wonderful piece of software and I really
> appreciate the work you have done. Could we make it even better? From a
> technical point of view, how hard would it be to have something akin to a
> precompiled format in luatex?
>

I think we should  start from
https://tex.stackexchange.com/questions/324559/guidelines-for-using-mylatexformat-with-luatex

(precompiled format it's a bit misleading --  a format it's already a  set
of compiled macros. I prefer custom format, as the link says)

--
luigi
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