I've seen this with some endpoint management tools. The difference between WSL1 and 2 was noticeable. That being sait, it was the other way round for us;

MinGW WSL1 WSL2
./configure 2m26s 2m37s 0m13s
make (compile) 4m49s 3m7s 1m19s
make check 18m50s 23m29s 1m15s

Here MinGW is the MSYS/MinGW build of gcc, running natively under Windows. WSL1 and WSL2 are local ubuntu installs running under the Windows Subsystem for Linux, version 1 and version 2. Version 1 has each linux process running as a native windows process, with a thin kernel shim. WSL2 is using a virtual machine