Comment #1 on issue 2873 by svenpa...@chromium.org: Compiled Lua VM slowness
http://code.google.com/p/v8/issues/detail?id=2873
I took a quick look at this: There are a few deopts we should look into,
but they don't seem to be the root cause. Furthermore, no
relevant "disabled optimization for..." happens, and --hydrogen-stats look
reasonable. The problem seems to be _luaV_execute, --prof tells us that
56.3% of the runtime are spent there, but it is only marked for
optimization, but not optimized:
[marking 0x2df3d131 <JS Function _luaV_execute (SharedFunctionInfo
0x4ed33059)> for recompilation, reason: not much type info but very hot,
ICs with typeinfo: 937/3781 (24%)]
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