Re: Lua string

[David Given <dg@...>]

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Luiz Henrique de Figueiredo wrote:
>> Is it possible to improve string operations performance in Lua?
> 
> http://www.lua.org/pil/11.6.html 

Yeah, but that's cheating; it's using a different algorithm.

Having a quick shufty through the source code reveals that SpiderMonkey
distinguishes between mutable and immutable strings. Mutable strings can have
a preallocated buffer.

So what's probably going on here is that the concatenation is mostly being
done as a data copy, with no extra allocations needed. A neat trick.

Lua could do something similar, but this would require a rather more
complicated compiler and garbage collector, to intelligently decide whether to
use mutable or immutable strings...

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