On 16.12.2020 13:13, Hamish McIntyre-Bhatty via Cygwin-apps wrote:
Hi, So I know it's been mentioned a lot that fork is slow on Cygwin, but compared to other people's machines, eg when building, it seems way slower for me. First I'd like to know if there's a good way to measure this that anyone has found, because I'm not sure how to measure it. If I print multiple lines with echo in a script, I can see it printing maybe 2-3 a second - it's very slow. I think this might be because I'm using a Virtual Machine with VirtualBox, and QEMU/KVM might be quicker. I'm using Avira Antivurus, with exceptions for the cygwin install folders (C:\cygwin64, C:\cygwin). It might be nice if we could so some comparisons so I can figure out what's wrong. Hamish
Same AV here, W10 64bit (no VM), 2 year old Laptop model name : Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz 4 cores https://github.com/mondalaci/fork-benchmark it seems there is a aging effect $ ./fork-benchmark.exe 1000 Forked, executed and destroyed 1000 processes in 39.928576 seconds. $ ./fork-benchmark.exe 1000 Forked, executed and destroyed 1000 processes in 42.701295 seconds. $ ./fork-benchmark.exe 1000 Forked, executed and destroyed 1000 processes in 49.890909 seconds. $ ./fork-benchmark.exe 1000 Forked, executed and destroyed 1000 processes in 61.657031 seconds.
