With the help of @samccone I got multi-process CPU profiling of my JS mono-toolchain.pic.twitter.com/C8rK8Kn9bX
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awesome, thanks! 
Might want to change this line though https://gist.github.com/kittens/768c883f6c4523bc2499fc046d7e15d3#file-trace-js-L92 …
Finally had time to play around with this. Managed to get it working.
Holy crap those traces are HUGE though. This one is 471 MB! JSON.stringify ran out of memory trying to write it.
pic.twitter.com/U2LjCHKuZU
You can flip the output to be streaming to avoid the string limits :) You end up paying more overhead for the profiler but... It helps in these cases.
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