Description:
------------
I encountered some serious performance problems on our server (2x 2.8 Xeon / 2gb ram / WinNT4-SP6) using scripts that had run very well on my small office workstation (Athlon 2400+ / 512gb ram / Win2k). 

I did some benchmarking (using scripts from http://www.sebastian-bergmann.de/PHP_Benchmark/ ) using cmdline php.exe on the server and found out that the "Array Index Access" test gives terrible results (around 10.000 accesses/s compared to around 745.000/s on my workstation). All other tests behaved as expected, so I don't think it is a configuration problem.

I tried different versions of php.ini (including php.ini-dist) and various versions of php itself (up to 5.0.0b1 / can't try 5.0.0b3 because of the getlongpathname bug). 
This beaviour started in 4.1.0 while everything runs fine under 4.0.6.

I don't have a second box with a similar setup, so I can't test other OS, but I have failed to reproduce this on any single-cpu system (Intel/Amd) running various OS (WinNT/Win2k/WinXP). 

Reproduce code:
---------------
$N = 1000000;
$table = array();
$start = getMicrotime();
for ($i = 0; $i < $N; $i++) {
    $table[$i] = $i;
}
for ($i = 0; $i < $N; $i++) {
    $i = $table[$i];
}
$end = getMicrotime();