RE: Faster tag methods
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- Subject: RE: Faster tag methods
- From: "Ryan Bright" <vt9grcaftqg1001@...>
- Date: Wed, 6 Mar 2002 23:09:34 -0800
From: Curt Carpenter curtc@microsoft.com
> Sure, the strcmps were just illustrative of the problem. (strncmp + atoi
> is supposed to be better than just strcmp?)
Yes. A single call to strncmp() + atoi() is much better than `n' calls to
strcmp().
> rely on the fact that lua_tostring returns
> a pointer to Lua's internal string, which means it's always the same,
> which means I can effectively treat that as an id. I really like that.
Agreed. I wasn't aware of this feature/optimization in Lua until this
discussion; very nice.
> Is that going to break in 4.1?
Perhaps you can use lua_equal() to compare the strings, instead of a raw
pointer comparison. Then, if the optimization goes away (which seems
unlikely), your programs won't break, only run somewhat more slowly.
--
Ryan Bright