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x64/LJ_GC64 tuning #225

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MikePall opened this issue Oct 16, 2016 · 0 comments
Open
2 tasks

x64/LJ_GC64 tuning #225

MikePall opened this issue Oct 16, 2016 · 0 comments

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@MikePall
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Moved from PR #149:

  • Various places use a 64 bit store plus a 32 bit load-modify-store to tag a value in memory. This is probably suboptimal for the CPU write combiner, but really needs to be benchmarked.
  • Benchmark x64/!LJ_GC64 against x64/LJ_GC64 to find regressions and more tuning opportunities.
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