ID: 30295
Updated by: [EMAIL PROTECTED]
Reported By: oliver at burtchen dot com
Status: Open
Bug Type: Performance problem
PHP Version: 5.0.2
New Comment:
for a short term solution use
array_key_exists($i, &$a);
Previous Comments:
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[2004-09-30 23:23:28] oliver at burtchen dot com
Description:
------------
it looks loke array_key_exists() makes a copy of the given array if
there is a reference to that array. if there is no reference,
everything works well.
Reproduce code:
---------------
// just to get the time in microseconds
function getmicrotime() {
list($usec, $sec) = explode(" ",microtime());
return ((float)$usec + (float)$sec);
}
$cnt = 2000;
$a = array_fill(0, $cnt, 'foo');
// this works as aspected very fast
$mtime = getmicrotime();
for ($i = 0; $cnt > $i; $i++)
array_key_exists($i, $a);
echo getmicrotime() - $mtime . '<br>';
$b =& $a; // making a reference, but not using it
// this will take a huge amount of time, but it's the same code as
above
$mtime = getmicrotime();
for ($i = 0; $cnt > $i; $i++)
array_key_exists($i, $a);
echo getmicrotime() - $mtime . '<br>';
Expected result:
----------------
the two loops should work the same.
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=30295&edit=1
