I assume that "precompile preamble" texStudio (advanced) option is meant to precompile a "preambule.tex" that is included before "begin{document}" in a "main.tex".
Here is the reference I get for "precompiling"
I expected to get a "preamble.fmt" file in working directory but nothing. I'm working with miktex on windows 10.
I guess I'm not setting this option properly. I haven't found anything about this in texstudio documentation. Is there any tutorial somewhere about what is doing the texstudio precompile option and how to use it?