Change what we do and don't outline#133
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vext01 merged 2 commits intoykjit:mainfrom Dec 15, 2025
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In ykjit#131 I added `yk_outline` to nearly every GC function and got an 8-9% speedup. Much has changed since then in how we optimise programs, so I decided to revisit this. First, as I noted in ykjit#131, I was sloppy and added `yk_outline` to functions with loops in (i.e. those that could never be inlined). Those are easily removed. Indeed, _most_ of the static functions in this file can't be reached (even indirectly) from the outside world, so most of those can also have `yk_outline` removed. Really what we have to think about are the `luaC_*` functions. A quick bit of experimentation suggests that, at least for now, they're best left outlined. Overall, this commit has no meaningful performance change that I can measure.
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This PR in a sense undoes some of the crudeness from #131 in f00740d and then marks a couple of functions we definitely don't want outlined. Overall with jitc_yk this slightly speeds up ~four benchmarks and leaves the rest untouched:
The
hashidsandstoragenumbers are repeatable. I'm less convinced by the others.