[Filligree]

The Windows filesystem is extremely slow, even without WSL. It can be mitigated to some extent by using completion ports, but I doubt the Rust compiler is architectured that way--

You should benchmark against Linux as well.

[kryps]

cargo install on WSL2 uses the non-mapped home directory, which is on an ext4 virtual disk. That is probably one reason why it is six seconds faster.