[messe]

Huh, this is surprising to me. Anecdotally, I tried Minecraft Java under Rosetta on my MBA, and it ran smoothly 2560x1600 resolution at 60 FPS with very few drops. Although I'd imagine that a JITed game might be easier for Rosetta to deal with, as it will be running the same code paths over and over again in comparison to a compiler.

[rsynnott]

I’ve never played minecraft, but is it generally cpu bound? The GPU is very fast, for a laptop-y thing, so that may be carrying it.

In synthetic tests, Java under Rosetta seems to range from twice to over four times as slow as native arm Java, depending on workload.