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Re: RE: Incremental transformations with Xalan and performance

• To: "Michael Kay" <mike@s...>
• Subject: Re: RE: Incremental transformations with Xalan and performance issues?
• From: Wolfgang Hoschek <whoschek@l...>
• Date: Mon, 6 Dec 2004 09:06:39 -0800
• Cc: <andrzej@c...>, <xml-dev@l...>, "'Daniela Florescu'" <dflorescu@m...>
• In-reply-to: <E1CbL2M-0002PQ-00@u...>
• References: <E1CbL2M-0002PQ-00@u...>

> despite the limitation that the source document has to fit in memory! 
> But nevertheless, the architecture looks very solid, and 
> congratulations to BEA for publishing it, unlike vendors of 
> "high-performance" XSLT engines who make marketing claims but give us 
> no technical information to enable an informed assessment or 
> comparison.
>  
> Michael Kay
> http://www.saxonica.com/
>

Casting a *full blown compliant* XSLT/XQuery engine into hardware seems 
difficult at best, near-impossible at worst.

Considering that XSLT/XQuery is orders of magnitude more complex than 
simple crypto algorithms, I'm wondering to what extent hardware 
addresses compliance, implementation bugs, upgrades, dynamic callback 
features, effective programming language integration, etc. Further, how 
small is the subset of functionality that actually benefits from 
hardware based associative memory addressing, if that is what's used 
here? Axis navigation could perhaps benefit, but what else? Similar 
question for jitting.

I'm skeptical until proven otherwise. Until the key technical novelties 
are explained, quantified precisely and reproducible for anyone, no 
fuzzy marketing talk and references to "proprietary patent pending 
breakthroughs" can paper over it.

Sorry if that's taking things a little too far in this particular forum.

Wolfgang.

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