Online PHP editor | refs for YTr8Q

<?php /* How many times the code under test should run in each function */ define('LOOP',1000000); function f1() { $var = NULL; for($i=0; $i<LOOP; ++$i) { $var = 'test'.'123'.'string'; } } function f2() { $var = NULL; for($i=0; $i<LOOP; ++$i) { $var = sprintf('test%sstring', 123); } } $start = microtime(true); f1(); $stop = microtime(true); $time1 = $stop - $start; $start = microtime(true); f2(); $stop = microtime(true); $time2 = $stop - $start; echo $time1 . "\t"; echo $time2 . "\n";