3v4l.org

run code in 300+ PHP versions simultaneously
<?php function isPrime($number) { $max = floor(sqrt($number)); for ($i=1; $i < $max; $i++) { if ($number % $i == 0) return false; } return true; } do { $i = mt_rand(100, 999); } while ( ! isPrime($i) ); var_dump($i);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

VersionSystem time (s)User time (s)Memory (MiB)
7.2.00.0002.50119.45
7.1.100.0002.50118.21
7.1.70.0072.49517.07
7.1.60.3532.14717.09
7.1.50.2502.25116.80
7.0.200.0072.49516.86

preferences:
22.85 ms | 400 KiB | 5 Q