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A comment on Pessimism about parallelism. Parent comment

Re:Pessimism about parallelism by twotwotwo on Wednesday December 26, 2018 @10:35AM (#18762587)
Re: showing bottlenecks, the Go latency tracer may be a neat reference point; it doesn't find serial parts automatically, but it shows the execution timeline so that you can see them. Besides serial bottlenecks, it can be useful for seeing where you blocked waiting on I/O and so on:

https://blog.gopheracademy.com/advent-2017/go-execution-trac...

There might already be similar tools for Rust; I know less about what's available there.

(Go folks also added some tools for tracing across RPCs, which is less relevant to what you said but just kinda independently neat: https://medium.com/observability/debugging-latency-in-go-1-1...)

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Re:Pessimism about parallelism by steveklabnik on Wednesday December 26, 2018 @10:42AM (#18762644)
Some of this functionality just doesn’t exist (no way to track gc when you have no gc), some of it uses C/C++ tooling (syscalls can be straced), some of it is just different (suspend points aren’t implicit), and some of it is on the way (tokio-trace is basically the real equivalent here but either doesn’t quite exist yet or is very new, I forget which to be honest).
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