Online PHP editor | output for tUtLb

<?php if(version_compare(PHP_VERSION, '5.0') <= 0) { die('Skipped'); } // Setup $class = 'Concrete5_Model_User'; $count = 10000; // Warm up for($i = 0; $i < $count; $i++) { strpos($class, 'Concrete5_Model_'); } // Test - case sensitive $t0 = microtime(true); for($i = 0; $i < $count; $i++) { if(strpos($class, 'Concrete5_Model_') === 0) { } } $deltaCS = microtime(true) - $t0; // Test - case insensitive $t0 = microtime(true); for($i = 0; $i < $count; $i++) { if(stripos($class, 'Concrete5_Model_') === 0) { } } $deltaCI = microtime(true) - $t0; // Test - substr $t0 = microtime(true); for($i = 0; $i < $count; $i++) { $ss = 'Concrete5_Model_'; if(substr($class, 0, strlen($ss) === $ss) { } } $deltaSS = microtime(true) - $t0; echo "case sensitive: ", round($deltaCS * 1000, 2), " ms\n"; echo "case insensitive: ", round($deltaCI * 1000, 2), " ms\n"; echo "case substring: ", round($deltaSS * 1000, 2), " ms\n"; echo "case sensitive gain: ", round($deltaCI * 100 / $deltaCS - 100, 2), " %\n";