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Optimize lua_touserdata by checking userdata case first

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Petri Häkkinen 2022-05-24 09:55:41 +03:00
parent fcbc012568
commit 22e57a8eab
1 changed files with 4 additions and 6 deletions
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10
VM/src/lapi.cpp
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@ -487,16 +487,14 @@ void* lua_tolightuserdata(lua_State* L, int idx)
void* lua_touserdata(lua_State* L, int idx) void* lua_touserdata(lua_State* L, int idx)
{ {
StkId o = index2addr(L, idx); StkId o = index2addr(L, idx);
switch (ttype(o)) // fast-path: check userdata first since it is most likely the expected result
{ if (ttisuserdata(o))
case LUA_TUSERDATA:
return uvalue(o)->data; return uvalue(o)->data;
case LUA_TLIGHTUSERDATA: else if (ttislightuserdata(o))
return pvalue(o); return pvalue(o);
default: else
return NULL; return NULL;
} }
}
void* lua_touserdatatagged(lua_State* L, int idx, int tag) void* lua_touserdatatagged(lua_State* L, int idx, int tag)
{ {