[webkit-dev] Using OfflineAsm
mark.lam at apple.com
Fri Sep 5 16:14:18 PDT 2014
> On Sep 5, 2014, at 4:05 PM, Mark Lam <mark.lam at apple.com> wrote:
>> 4) Should I actually expect a performance increase compared to the “C LOOP”?
> Yes. The ASM LLINT should be faster than the C LOOP LLINT.
To clarify, the C LOOP LLINT emulated a CPU’s behavior using emitted C instructions. As a result, it incurs a performance penalty that is under 10% (vs the ASM LLINT) if I remember correctly. So, the perf gain you’ll get comes from recuperating the losses due to the C loop being a CPU emulator. You should not expect to see any of the more substantive gains that come from the JITs.
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