This is probably shader compilation. There is a solution called ubershaders in this PR https://github.com/dolphin-emu/dolphin/pull/3163
Widows build https://dl.dolphin-emu.org/prs/pr-3163-dolphin-latest-x64.7z
Note its not finished and there are multiple glitches.
Widows build https://dl.dolphin-emu.org/prs/pr-3163-dolphin-latest-x64.7z
Note its not finished and there are multiple glitches.
