Great overview of this field!
One other use I've seen, is simply coloring each identifier uniquely, to help see dataflow at a glance. Apparently first introduced in KDevelop in 2009 (also under the name "semantic highlight" — https://zwabel.wordpress.com/2009/01/08/c-ide-evolution-from-syntax-highlighting-to-semantic-highlighting/), spread via https://medium.com/@evnbr/coding-in-color-3a6db2743a1e post to emacs (https://github.com/Fanael/rainbow-identifiers, https://github.com/ankurdave/color-identifiers-mode) and there are a bunch of VSCode extensions too (e.g. https://marketplace.visualstudio.com/items?itemName=KevinGhadyani.vscode-colormate, I've used several but don't remember which one has good/bad performance...)
P.S. I'll also mention https://blog.brownplt.org/2018/06/11/philogenic-colors.html which is a neat algorithm to pick colors that are as non-similar as possible. That's not a stable hash, but may be useful for other uses here?
Great overview of this field! One other use I've seen, is simply coloring each identifier uniquely, to help see dataflow at a glance. Apparently first introduced in KDevelop in 2009 (also under the name "semantic highlight" — https://zwabel.wordpress.com/2009/01/08/c-ide-evolution-from-syntax-highlighting-to-semantic-highlighting/), spread via https://medium.com/@evnbr/coding-in-color-3a6db2743a1e post to emacs (https://github.com/Fanael/rainbow-identifiers, https://github.com/ankurdave/color-identifiers-mode) and there are a bunch of VSCode extensions too (e.g. https://marketplace.visualstudio.com/items?itemName=KevinGhadyani.vscode-colormate, I've used several but don't remember which one has good/bad performance...)
P.S. I'll also mention https://blog.brownplt.org/2018/06/11/philogenic-colors.html which is a neat algorithm to pick colors that are as non-similar as possible. That's not a stable hash, but may be useful for other uses here?