# Compiling small part of text

I'm using winedt for Latex. sometimes I'm only working on a section of my paper and want to recompile to PDF without going through the whole time-consuming compilation. Is there a way I can tell Latex I've just changed a part of the text (or a section) so that it goes faster.

I know about `\includeonly` but this seems to work on specific chapters rather than at a micro level like my problem.