Isolates are limited to a single thread. There's no built in way to throttle an isolate's CPU usage, but you can manage the thread it belongs to. Which means is

Isolates are limited to a single thread. There's no built in way to throttle an isolate's CPU usage, but you can manage the thread it belongs to. Which means isolates aren't inherently worse for CPU contention than processes would be, you just need to roll your own throttling instead of using something like cgroups.