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   Re: [xml-dev] Exploiting multi-core CPUs during XML parsing

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After further reading, I find myself eying the date suspiciously... 
though it doesn't seem too unreasonable...


Jeff Rafter

Sean McGrath wrote:
> I have sketched out an algorithm for fast XML WF parsing utilising two 
> threads that each start at opposite ends of the octet-stream and meet in 
> the middle. The algorithm hinges on the fact that start- and end-tags 
> are balanced. i.e. as one thread reads forward looking for foo 
> start-tag, the other thread is reading backwards looking for foo end-tag.
> This also has the nice side effect of giving you accurate error messages 
> quickly. i.e. as soon as a mismatched tag is found, it can be reported. 
> This is particularly useful with recursive element types.
> Modern machines (even desktop boxes) will increasingly have multi-core 
> CPUs as standard and I think it behooves us to find ways of exploiting 
> that in the XML world.
> But to get the most out of the algorithm, you really need a filesystem 
> that supports reading byte-streams backwards.
> Does anyone know of such a filesystem?
> thanks,
> Sean
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