This is probably also why Cygwin and even the WSL subsystem in general are a lot slower when running more complex shell scripts, which is typically spawns tons

This is probably also why Cygwin and even the WSL subsystem in general are a lot slower when running more complex shell scripts, which is typically spawns tons of processes. I wrote a pretty simple shell script to test WSL process spawn speed, which loops over a simple echo piped to a grep, and add 1 to a counter until it reaches 1000. On my windows machine, in a Linux VM, I consistently get times like this: real 0m1.381s user 0m0.073s sys 0m1.472s On the same machine in WSL, I get results like this consistently: real 0m14.878s user 0m0.469s sys 0m12.109s That is 10 times slower... I don't have cygwin installed anymore, but when I tested it initially when trying out WSL, it was even slower...