> WSL2 does not take less advantage of filesystem caches.
My understanding is when you access files on the windows drive, the linuxvm in WSL2 caches it in its own memory, and the windows side caches it in its: now you have double the memory usage on disk cache where files are active on both, taking much less advantage of caches than if you had used WSL1 where windows serves as the sole cache for windows drives.
I'm only comparing working on windows filesystems that can be accessed by both. My use case is developing on large windows game projects, where the game needs the files fast when running, and WSL needs the files fast when searching code, using git, etc. WSL1 was usable on plain NTFS, and now much closer to ext4 with dev drive NTFS. WSL2 I couldn't make fast.
You could potentially have the windows files on a network drive on the WSL2 side living in native ext4, but with that you get the double filesystem caching issue, and you might slow a game editor launch on the windows side by way too much, your files are inaccessible during upgrades and you have to always have RAM dedicated to WSL2 running to be able to read your files. MS store versions of WSL2 will even auto upgrade while running and randomly make that drive unavailable.
My understanding is when you access files on the windows drive, the linuxvm in WSL2 caches it in its own memory, and the windows side caches it in its: now you have double the memory usage on disk cache where files are active on both, taking much less advantage of caches than if you had used WSL1 where windows serves as the sole cache for windows drives.
I'm only comparing working on windows filesystems that can be accessed by both. My use case is developing on large windows game projects, where the game needs the files fast when running, and WSL needs the files fast when searching code, using git, etc. WSL1 was usable on plain NTFS, and now much closer to ext4 with dev drive NTFS. WSL2 I couldn't make fast.
You could potentially have the windows files on a network drive on the WSL2 side living in native ext4, but with that you get the double filesystem caching issue, and you might slow a game editor launch on the windows side by way too much, your files are inaccessible during upgrades and you have to always have RAM dedicated to WSL2 running to be able to read your files. MS store versions of WSL2 will even auto upgrade while running and randomly make that drive unavailable.