when run node with --prof the `crypto.pbkdf2` will not loged in

[chaosforfun]

Version 6.5.0
Platform: ubuntu 64-bit

i have a process which invoke crypto.pbkdf2 to encrypt password. and it will let the cpu 390%.so i use
node --prof and node --prof-process to profile, but in the log file ,crypto.pbkdf2 did not take up lot cpu time.

if I small the iterations param of crpto.pbkdf2 ,this process will not take up log cpu time, and if i set bigger iterations it will take up a lot cpu time.so i am sure this function take a log cpu time, but why it did non show in the log of node --prof.

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[Fishrock123]

@chaosforfun can you post some of your code and a processed profile? (output from --prof-process)

[bnoordhuis]

Not a bug. The profiler only profiles the main thread (the thread executing JS). The asynchronous version of crypto.pbkdf2() runs in the thread pool and hence doesn't show up in the profiler. You won't see crypto.randomBytes() or any of the zlib functions for the same reason.