RE: Performance versus legibility

Subject: RE: Performance versus legibility
From: Kay Michael <Michael.Kay@xxxxxxx>
Date: Fri, 24 Nov 2000 14:59:02 -0000
> not(string(.))	string-length(.)=0
> not(x)		count(x)=0
> not(x=y)	x!=y
> I always use the expressions in the second column for 
> maintainability, but I 
> guess the items in the first column are faster. Is my 
> assumption correct? 

In the case of Saxon, yes. But note that not(x=y) and x!=y are not

(And note not that they are equivalent!)

Mike Kay

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