On Sat, 31 Aug 2024 at 15:17, user202729--- via luatex <luatex@tug.org> wrote:
> Hi, > > Do you think the following is a reasonable possible performance > improvement for LuaTeX? Thank you. > > ------ > > In the hnj_hyphenation function, currently the large array `utf8word` is > zeroed out every time the function is called. > > This is unnecessary (the string is always null-terminated before being > used. Besides, observe that the function processes multiple words per call, > without zeroing out the array between each word, so even with the current > function there could be nonzero bytes after the null terminator at each use > of the array). > > For a plain TeX file where macro expansion takes negligible time (such as > tex.tex, the source code of TeX), this single improvement can speeds up the > compilation time by 25%. On my machine, the runtime decreases from 3.064s > to 2.327s. > > To generate `tex.tex`, you can download `tex.web` from CTAN package `tex`, > and run `weave tex.web` > > The patch is attached below. Committed r72156 (TeXLive repo). -- luigi
