We have a number of widgets that get recompiled multiple times per minute, and one in particular that appears to get recompiled sometimes as frequently as every second on every web server across all of our wiki web servers, where all that seems to change is the internal function name. Here's an example of our busiest widget, Game link, both the compiled file and a diff showing the change after a recompilation:
Widget: https://gist.github.com/justinclloyd/de898853d6a9ed2bbc58899b54a3b31f
Recompiled version: https://gist.github.com/justinclloyd/aa377a206ffe6e07dab21c59a22f74d5
This widget in particular is used by several templates, which in turn are used by many thousands of pages, so the widget gets used a tremendous amount.
We're running MediaWiki 1.36.3 (MediaWiki core and extensions pulled from Gerrit branch REL1_36 on December 16,2021).