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tardyp | 4 years ago

Looks like QuickTransit was a jit engine which was the base of Rosetta 1. Rosetta 2 is AOT translation.

discuss

simonh|4 years ago

They’re both based on QuickTransit, but Rosetta 2 has an AOT mode as well as JIT. I’m sure the R2 engine is more advanced than the original engine, Apple employed several engineers from the original team, but it still uses and is based on licensed tech.

GeekyBear|4 years ago

My understanding is that Rosetta 2 is based on LLVM.

Even the company that made QuickTransit is gone now, having been bought out by IBM a decade ago.