I have analysis the cause of the performance drop.<br><br>My first statement is wrong, the performance drop is not from 7.2 to 7.3 but from 7.2 to 7.2.1.<br><br>BaseX v7.2 executes the query in sequence. First the flwor which extracts data and stores them in a map. Second the flwor which test if values are contains in the map.<br>
<br>BaseX v7.2.1 optimises the query and the two sequentials flwor are merge in a main flwor with an embed flwor. The maps seems to be constructed again and again for each value of the second flwor.<br>
<br><br>Hope it will help,<br><br>Regards,<br><br>Nicolas<br><br><br><br><div class="gmail_quote">On Mon, Jun 25, 2012 at 10:21 AM, Nicolas Labrot <span dir="ltr">&lt;<a href="mailto:nithril@gmail.com" target="_blank">nithril@gmail.com</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br><br>I have upgraded BaseX from 7.2 to 7.3 but I have a severe performance drop on my query. <br><br>My query is in 2 parts : <br>
<ul><li>The first part extracts values from an xpath and store them in a map (the map contains 40000 entries)<br>
</li><li>The second part extracts values from an xpath and test if they are contains in the map (xpath return around 30000 entries).</li></ul><br>On 7.2 a typical query run on 2s and on 7.3 I have no result after 10 minutes<br>

<br>Is there modification on BaseX 7.3 which can explain this performance drop ?<br><br>Thanks for your help,<br><br>Regards,<br><br>Nicolas <br><br>
</blockquote></div><br>