note 74627 deleted from language.types.string by felipe

Note Submitter: maikel7 at poczta dot onet dot pl ---- I was curious about speed differences between "some text $var" and "some text".$var. And my tests seem to be quite the opposite to the benchmarks posted below by "php at moechofe dot com". I used this code: <?php function microtime_float() { list($usec, $sec) = explode(" ", microtime()); return ((float)$usec + (float)$sec); } $str = "some text"; $time_start = microtime_float(); for ($i=0; $i<100000; $i++) { $a="x $str o $str a $str d $str f $str"; } $duration1 = microtime_float() - $time_start; $time_start = microtime_float(); for ($i=0; $i<100000; $i++) { $a="x ".$str." o ".$str." a ".$str." d ".$str." f ".$str; } $duration2 = microtime_float() - $time_start; ?> On a windows machine $duration1 is about 2.5x greater (=slower) than $duration2. I ran it also on several hosting servers (Linux-based) and the differnces were smaller but still $duration1 was much greater. Only on one of the hosts where they use eAccellarator there was no difference between the two methods. So my conclusion is not to use "$variables in double-quoted strings" wherever speed is important.