Earlier quoted context omitted.
I know it's a rare case, and i haven't been able to reproduce it 100% reliable, but in most cases when 4+ chromes want to do stuff, my hardware goes "nope, fuck that" and degrades performance for everything while spooling the CPU up noticably. The same hardware handles a single chrome just fine even when doing full-on 3d stuff. Sometimes just scrolling through twitter with 3 electron apps running starts the stutters.…
Hmm. If you are on Postman, I'd love to get your help in debugging this. Performance issues that I have seen exist at massive scale for us - ~10K requests or hundreds of collections. Of course, working on optimizing for all of these cases.
That said, i don't use Postman, heard of it the first time today. But you might be able to reproduce some of the issues by loading a very animation-heavy imgur page like https://imgur.com/a/0L8Bu , scrolling to the gifs, maybe zooming out a little to get more on screen, and starting up a bunch of different electron apps. Particularly helpful would be using https://technet.microsoft.com/en-us/sysinternals/processexpl... to keep an eye on the interrupt CPU usage. Once you start seeing lots of red activity you're getting close.