https://nodewood.com/blog/how-to-speed-up-docker-on-macos/
tl;dr - The default file synchronization mode that Docker uses on MacOS is trash. You can use Mutagen to drastically speed it up. (I'm actually underselling it in the title.) And it's easy to do, too -- you can probably set it up in 10 minutes, including reading the article.
Thanks! I'll try it and report back. I desperately need it to stop slowing down my machine.
Yeah, that's why I went and figured this out in the first place - Jest tests are slow enough, I didn't need a slow sync method making it worse.
Let me know if you run into any issues, maybe I can help! At least I can update the article to save the next person any troubles. =)