Re: Using Lua's string interning for faster compares?
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- Subject: Re: Using Lua's string interning for faster compares?
- From: Roberto Ierusalimschy <roberto@...>
- Date: 2012年1月17日 22:42:54 -0200
> > So we can rely on this behaviour and safely compare the pointer
> > instead of the string itself?
>
> Yes, but you have to make sure that the strings still exist in Lua,
> that is, are not collected. One way to do that is to use them as keys
> or values in a table.
To be 'religious' about the specification, you should not use a string
pointer unless the string is anchored in the stack. But I guess it is
quite safe to do the above in current implementations.
-- Roberto