Re: performance issues saxon

well yeah I have actually used the keys for the second step..( was a mistake
when I reproduced the actual problem)
Any Idea about the performance of Saxon Under Tru64 Unix Box?
Thanks
Vasu
----- Original Message -----
From: "Michael Kay" <michael.h.kay@xxxxxxxxxxxx>
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Sent: Tuesday, February 18, 2003 1:49 PM
Subject: RE:  performance issues saxon


> > Ok if  the requirement is to group all the products of the
> > same id together, I would follow the following steps. 1. Get
> > all the unique nodes 2. Group all the products with the id as
> > defined by the id of the unique node.
> >
> >
> > Is there any other way we could avoid using two nested  loops
> > for a requirement like this? Thanks Vasu
>
> Absolutely. Muenchian grouping solves this in O(n log n) time. See
> www.jenitennison.com/xslt/grouping for the algorithm.
>
> Actually it's essentially the algorithm you described above. Step 1
> requires a serial scan of the document, Step 2 requires an index lookup
> using a key. Your mistake was to do step 2 with a (second, nested)
> serial scan.
>
> Michael Kay
> Software AG
> home: Michael.H.Kay@xxxxxxxxxxxx
> work: Michael.Kay@xxxxxxxxxxxxxx
>
>
>
>  XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list
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