We had some source map performance issues a while back, but I fixed all the ones that were reported. If you have a test case and steps to reproduce, I'd love to take a look :)
Is there an existing bug I can chime in on or should I report a new one?
I understand if your app is proprietary and you can't share the source, but even non-minimal test cases are much better than no test case :)
Thanks!
Outside of my 10kloc app, I could only reproduce it with ~100 copies of jQuery, which is kind of a pathological case I guess.