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Date: 01 May 2003 16:31:06 -0700
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Subject: xmldoc() takes ages
From: waboring@3gstech.com (Walt Boring)

Howdy,
  I have a 12Meg xml file that I am trying to get PHP 4.3.1 to parse
using libxml2 with xmldoc(), and it takes ~ 11 minutes to do this on a
P4 1.8Hhz box.

The same operation in libxml2's python interface takes 6 seconds.

here is my code.  Any ideas why it takes 11 minutes?  12Megs of valid
xml is large, but not 11 minutes worth of large.  

<?php

//my includes here
set_time_limit( 345600 );

$xml = implode('', file("foo_3.xml"));
debug_message("parsing xml file of len = ".strlen($xml));

$doc = xmldoc( $xml );
//it takes 11 minutes to get here!
debug_message("GOT THE DOC");
exit;

?>

The output
[waboring@hemna bin]$ time php -f xml.php
PHP Notice: 
DEBUG:(16:04:00):/home/waboring/devel/freemap/bin/xml.php::(11) parsing
xml file of len = 11223576
 in /home/waboring/devel/freemap/lib/util.inc on line 784
PHP Notice: 
DEBUG:(16:13:55):/home/waboring/devel/freemap/bin/xml.php::(16) GOT THE
DOC
 in /home/waboring/devel/freemap/lib/util.inc on line 784
<div style="float: left;"> TOTAL EXECUTION TIME: 595.5</div>

real    9m56.163s
user    8m57.790s
sys     0m4.280s



python tst.py that comes with libxml2-python package.


#!/usr/bin/python -u
import sys
import libxml2

# Memory debug specific
libxml2.debugMemory(1)

doc = libxml2.parseFile("tst.xml")
if doc.name != "tst.xml":
    print "doc.name failed"
    sys.exit(1)
root = doc.children
print "doc.name = "+root.name

#if root.name != "doc":
#    print "root.name failed"
#    sys.exit(1)
child = root.children
#if child.name != "foo":
#    print "child.name failed"
#    sys.exit(1)
doc.freeDoc()

# Memory debug specific
libxml2.cleanupParser()
if libxml2.debugMemory(1) == 0:
    print "OK"
else:
    print "Memory leak %d bytes" % (libxml2.debugMemory(1))
    libxml2.dumpMemory()

output of
[waboring@hemna bin]$ time ./tst.py
doc.name = MAP
OK

real    0m3.413s
user    0m2.860s
sys     0m0.390s

Ok, so I'm not 100% sure that the python libxml2.parseFile() does
EXACTLY the same php's xmldoc(), but I don't think xmldoc() should take
11 minutes.  It also sucks up a ton of ram.

Walt