Performance degredation post compilation for firefox

Description

This is a really bizarre upstream issue, but not sure where to report it to. I have a performance intensive, canvas heavy app in CRA. In dev mode, performance is perfectly fine on a good computer on firefox and chrome. After an npm run build, perf is identical on chrome, but on firefox there is serious degredation (things get super laggy)

Expected behavior

I would expect pre and post minification to have the same performance characteristics

Actual behavior

Post minification on firefox gets laggy

Environment

Run these commands in the project folder and fill in their results:

Then, specify:

1. Operating system:

2. Browser and version:

Reproducible Demo

Releasing the code / creating a demo isnt really feasible. It probably wont be super helpful, but you can see http://custom.gelaskins.com/312 works fine with chrome on a machine with a video card, but runs like crap on firefox. In dev mode, that codebase works the same on both

[Timer]

Fair enough – still something I’d like to see the resolution to though. If you could still post the link here @mbriggs, that’d be great!

[Timer]

@mbriggs Hi! I believe they’re asking for more information on the bugzilla tracker. 😄 Just a friendly ping in case you don’t get notifications there.