Comment by saagarjha
7 years ago
Yeah, if you're using Windows you aren't going to be able to use it. Or are you suggesting that Microsoft should implement posix_spawn?
7 years ago
Yeah, if you're using Windows you aren't going to be able to use it. Or are you suggesting that Microsoft should implement posix_spawn?
Can't you use posix_spawn() with WSL and your favorite POSIX-compatible libc implementation?
Well that's a complicated question to answer.
You can use the posix_spawn function in glibc, which uses a vfork or clone syscall just like on Linux.
Also relevant, regarding the Linux native performance:
https://mobile.twitter.com/RichFelker/status/602313979894038...
"Rich Felker, May 24, 2015: Some interesting preliminary timing of @musllibc 's posix_spawn vs fork+exec shows it ~25x faster for large parent processes. (~360us vs 9ms). #glibc has a vfork-based posix_spawn but it's only usable for trivial cases; others use fork. @musllibc posix_spawn always uses CLONE_VM. This also means @musllibc posix_spawn will fill the fork gap on NOMMU systems cleanly/safely (unlike vfork) once we get NOMMU working."
Also evilotto's post here:
https://news.ycombinator.com/item?id=19622477
"a 100mb process generally takes >2ms to fork, while a 1mb or less process takes 70us"
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