<!-- 
4XPath Performance test from "Olivier Deckmyn" <odeckmyn.list@teaser.fr>, with import and filename updates

Subject: [4suite] 4XPath performance ?
Date: Thu, 8 Jun 2000 16:30:21 +0200
From: "Olivier Deckmyn" <odeckmyn.list@teaser.fr>
To: "4Suite list" <4suite@dollar.fourthought.com>

I am playing and testing 4XPath....
And I am a little afraid of the results I see...
The machine is a Dell Server (2400) with a single PIII-750 and 256MB RAM,
USCSI disks (10K RPM), running FreeBSD4.

There is a lot of memory, cpu is not used for anything else than the test...

With a 100KB xml file, I have applied the attached test1.py

Here are the results :
QUERY="//author" (no match in the file)
Reading document
took 1.336457 sec
Starting query
took 307.572385 sec
Indexing DOM
took 0.125362 sec
Starting query
took 84.692544 sec

QUERY="//date" (few matches in the file)
Reading document
took 1.341848 sec
Starting query
took 308.466919 sec
<date> 10 October 1996</date><date>1 August 1996</date><date>17 April
1996</date><date> 17 April 1996</date><date> 17 April 1996</date><date> 12
April 1996</date><date>27 March 1996</date><date>27 March
1996</date><date>23 February 1996</date><date>9 December 1996</date><date>
29 November 1996</date><date> 31 October 1996</date>Indexing DOM
took 0.128668 sec
Starting query
took 85.145023 sec
<date> 10 October 1996</date><date>1 August 1996</date><date>17 April
1996</date><date> 17 April 1996</date><date> 17 April 1996</date><date> 12
April 1996</date><date>27 March 1996</date><date>27 March
1996</date><date>23 February 1996</date><date>9 December 1996</date><date>
29 November 1996</date><date> 31 October 1996</date>


Result :
Indexing is worth the price ! Very quick index build, and 3.5x speed gain
...
But, it very slow anyway :(

Is this the "normal" performance ? Can I do better?
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
<head>
<script src="../../../../resources/js-test-pre.js"></script>
</head>
<body>
<div id="console"></div>

<script>

    req = new XMLHttpRequest;
    req.open("GET", 'resources/od_20000608.xml', false);
    req.send(null);
    xml_dom_object = req.responseXML;

    EXPR = '//author'
    nodeset = xml_dom_object.evaluate(EXPR, xml_dom_object, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    shouldBe('nodeset.snapshotLength', '0')

    EXPR = '//date'
    nodeset = xml_dom_object.evaluate(EXPR, xml_dom_object, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
    shouldBe('nodeset.snapshotLength', '12')

</script>
<script src="../../../../resources/js-test-post.js"></script>
</body>
</html>