Why is WSL extremely slow when compared with native Windows NPM/Yarn processing?

I am working with WSL a lot lately because I need some native UNIX tools (and emulators aren't good enough). I noticed that the speed difference when working with NPM/Yarn is incredible. I conducted a simple test that confirmed my feelings. The test was running `npx create-react-app my-test-app` and the WSL result was `Done in 287.56s.` while GitBash finished with `Done in 10.46s.`. This is not the whole picture, because the perceived time was higher in both cases, but even based on that - there is a big issue somewhere. I just don't know where. The project I'm working on uses tens of libraries and changing even one of them takes minutes instead of seconds. Is this something that I can fix? If so - where to look for clues? Additional info: - my processor: Processor AMD Ryzen 7 5800H with Radeon Graphics, 3201 Mhz, 8 Core(s), 16 Logical Processors - I'm running Windows 11 with all the latest updates to both the system and the WSL. The chosen system is Ubuntu 20.04 - I've seen some questions that are somewhat similar like https://stackoverflow.com/questions/29395211/npm-install-extremely-slow-on-windows, but they don't touch WSL at all (and my pure Windows NPM works fast). - the issue is not limited to NPM, it's also for Yarn - another problem that I'm getting is that file watching is not happening (I need to restart the server with every change). In some applications I don't get any errors, sometimes I get the following: ``` Watchpack Error (initial scan): Error: EACCES: permission denied, lstat '/mnt/c/DumpStack.log.tmp' Watchpack Error (initial scan): Error: EACCES: permission denied, lstat '/mnt/c/hiberfil.sys' Watchpack Error (initial scan): Error: EACCES: permission denied, lstat '/mnt/c/pagefile.sys' Watchpack Error (initial scan): Error: EACCES: permission denied, lstat '/mnt/c/swapfile.sys' ``` - `npm start` in an empty (freshly initialized) `create-react-app` takes ages to render something in the browser in WSL and when executed from GitBash - I can see stuff in 2-4 seconds - it is possible that's it's purely a WSL problem, but it just hurts the most when using NPM/Yarn