Potential feature - accelerated compilation

[py9mrg]

I recently came across this question on SE, where someone has managed to make pdflatex much faster (particularly for large documents) by "pre-compiling" the preamble. The accepted answer mentions that there's a package mylatexformat that can assist in this process. I was wondering if you thought it might be a feature worth introducing to tinytex? I wonder, also, if a similar approach might work with xelatex, as that compiles noticeably slower than pdflatex, although I don't really know why so maybe this won't help.

[yihui]

I have never heard of this before. If anyone can figure out how to make it work with tinytex, I can probably review the pull request. Thank you!