Comment by tonymet

I had to speculate using the changelog, since MS hasn’t released performance tests . Kernel 6.18 has a better scheduler and other refinements. WSL3 improved the clock routines to use a synthetic clock. There are quite a few others.

virtiofs is the biggest change, it was experimental in 2.x. It doesn’t affect my application, but most new users who want to share files between windows + Linux will see a huge bump.