I find Eli Bendersky’s writeup [1] more useful as it actually goes closer to the details. For readers less familiar, it also makes it more clear what the time s

I find Eli Bendersky’s writeup [1] more useful as it actually goes closer to the details. For readers less familiar, it also makes it more clear what the time spent will depend on (how much state there is to copy). Eli’s post is actually a sub-post of his “cost of context switching” post [2] which is more often applicable (and helps answer all the questions below about threadpools). [1] https://eli.thegreenplace.net/2018/launching-linux-threads-and-processes-with-clone/ https://eli.thegreenplace.net/2018/launching-linux-threads-a... [2] https://eli.thegreenplace.net/2018/measuring-context-switching-and-memory-overheads-for-linux-threads/ https://eli.thegreenplace.net/2018/measuring-context-switchi...