> Windows decided to go the "always JIT and just cache frequent code blocks" method though. In the end whichever you choose it doesn't seem to make a big difference.
AOT (or, static binary translation before the application launch) vs JIT does make a big difference. JIT always carries a pressure of the «time spent JIT'ting vs performance» tradeoff, which AOT does not. The AOT translation layer has to be fast, but it is a one-off step, thus it invariably can afford spending more time analysing the incoming x86 binary and applying more heuristics and optimisaitons yielding a faster performing native binary product as opposed to a JIT engine that has to do the same, on the fly, under tight time constraints and under a constant threat of unnecessarily screwing up CPU cache lines and TLB lookups (the worst case scenario for a freshly JIT'd instruction sequence spilling over into a new memory page).
> "it knows basically none of the "tricks" available but the _emulation speed_ isn't much slower than the Rosetta 2 emulation ratio "
I still fail to comprehend which tricks you are referring to, and I also would be very much keen to see actual figures substantiating the AOT vs JIT emulation speed statement.
AOT (or, static binary translation before the application launch) vs JIT does make a big difference. JIT always carries a pressure of the «time spent JIT'ting vs performance» tradeoff, which AOT does not. The AOT translation layer has to be fast, but it is a one-off step, thus it invariably can afford spending more time analysing the incoming x86 binary and applying more heuristics and optimisaitons yielding a faster performing native binary product as opposed to a JIT engine that has to do the same, on the fly, under tight time constraints and under a constant threat of unnecessarily screwing up CPU cache lines and TLB lookups (the worst case scenario for a freshly JIT'd instruction sequence spilling over into a new memory page).
> "it knows basically none of the "tricks" available but the _emulation speed_ isn't much slower than the Rosetta 2 emulation ratio "
I still fail to comprehend which tricks you are referring to, and I also would be very much keen to see actual figures substantiating the AOT vs JIT emulation speed statement.