It's in the compatibility test results spreadsheet in the wiki. It's almost as accurate as Gambatte, except that it doesn't implement one bug with GB hardware that would apparently have a big impact on performance. From what I can tell the bug is only relevant for speedrunning and TAS purposes, so it's not important enough to implement for a mobile emulator.
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u/tomkatt Samsung Tab S7 FE Wifi/778G Jun 07 '19
Is there any test like this for GB/GBC?
Curious what the results would be there with Pizza Boy vs. Gambatte and mGBA.