14 ms·

To precise, you say WSL1 is faster compared to Windows, or compared to WSL2? With WSL2 (and native-comp emacs branch) I've never noticed any unusual slowdowns w

• TeMPOraL 6y ago
  WSL1 process creation is faster compared to Windows, because part of the black magic it does to run Linux processes on NT kernel is using minimal processes - so called "pico processes"[0]. These are much leaner than standard Windows processes, and more suited for UNIX-style workflow. I can't say if it's faster relative to WSL2, but I'd guess so. WSL2 is a full VM, after all. -- [0] - https://docs.microsoft.com/en-us/archive/blogs/wsl/pico-process-overview https://docs.microsoft.com/en-us/archive/blogs/wsl/pico-proc...
  • vlovich123 6y ago
    It shouldn't actually be a noticeable difference. HW virtualization means that unless the guest is doing I/O or needs to be interrupted to yield to the host, the guest is kind of just doing its thing. Spawning a new user space process in a VM should, in theory, be basically the same speed as spawning a new user space process on the bare metal. How that compares to the WSL1 approach of pico processes I don't know, but Linux generally has a very optimized path for spawning a process that I would imagine is competitive.