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From majohnst <m...@lattaoutdoors.com>
Subject Date Property Performance in 1.6
Date Thu, 01 Oct 2009 18:52:23 GMT

I am evaluating migrating from 1.5 to 1.6. I created several test cases that
prove the query performance of 1.6 is the same or better than 1.5. That is
until I add a date property into my query. 

In my tests, my base query is:
//element(*,my:namespace)[@property='value'] order by @datestart descending

The time to run this query in 1.5 and 1.6 is:
1.5 = 1.5 seconds
1.6 = 1.5 seconds

If I add a date property:
//element(*,my:namespace)[@property='value' and
@datestart<=xs:dateTime('2009-09-24T11:53:23.293-05:00')] order by
@datestart descending

the results are:
1.5 = 1.5 seconds
1.6 = 3.5 seconds

What changed in version 1.6 that would cause the date performance to degrade
so much?
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