Re: Performance versus legibility

Subject: Re: Performance versus legibility
From: Dimitre Novatchev <dnovatchev@xxxxxxxxx>
Date: Fri, 24 Nov 2000 07:26:57 -0800 (PST)
Hi Richard,

I cannot say anything definite about which expressions are optimal,
my only remark is that the following too are completely different -- it
is an error to assume they are equivalent in case x and y are

not(x=y)	x!=y

Dimitre Novatchev.
------------------- Original Message ------------------
To: XSL-List at mulberrytech dot com 
Subject: Performance versus legibility 
From: "Richard Birkby" <rbirkby at hotmail dot com> 
Date: Fri, 24 Nov 2000 14:16:32 -0000 
Reply-To: xsl-list at mulberrytech dot com 


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
Are there any other performance bottlenecks in common usage?


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