note 22360 added to function.array-rand

I modified fake_array_rand to always only return 1 element, and did some benchmarks against calling array_rand with the second parameter as 1. I ran 100 samples for each function for each number of elements and took the average result. While the internal array_rand is faster for a small number of elements, it scales very poorly. 1 elements: 2.0619630813599E-05 sec. for array_rand,8.4352493286133E-05 sec. for fake_array_rand 10 elements: 2.1675825119019E-05 sec. for array_rand,8.427619934082E-05 sec. for fake_array_rand 100 elements: 2.9319524765015E-05 sec. for array_rand,8.4599256515503E-05 sec. for fake_array_rand 1000 elements: 0.0001157283782959 sec. for array_rand,8.5572004318237E-05 sec. for fake_array_rand 10000 elements: 0.0016669762134552 sec. for array_rand,8.5201263427734E-05 sec. for fake_array_rand 100000 elements: 0.015599734783173 sec. for array_rand,8.5580348968506E-05 sec. for fake_array_rand 1000000 elements: 0.18011983394623 sec. for array_rand,8.6690187454224E-05 sec. for fake_array_rand function fake_array_rand ($array) { $count = count ($array); # Help keep the number generator random :) $randval and usleep ("0.$randval"); # Seed the random number generator # Generate a random number srand ((double) microtime() * 10000000); $randval = rand(); # Use the random value to 'pick' an entry from the array # Count the number of times that the entry is picked ++$index[$randval % $count]; return $array[$randval % $count]; } -- http://www.php.net/manual/en/function.array-rand.php http://master.php.net/manage/user-notes.php?action=edit+22360 http://master.php.net/manage/user-notes.php?action=delete+22360 http://master.php.net/manage/user-notes.php?action=reject+22360