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run code in 300+ PHP versions simultaneously
<?php $array = []; for ($i = 0, $j = 100; $i < $j; ++$i) { $array[] = new DateTimeImmutable(); } $t1 = microtime(true); for ($i = 0; $i < 100; ++$i) { function () use ($array) { }; } $t3 = microtime(true); echo (1000000 * ($t3 - $t1)) . "\n\n";

preferences:
26.52 ms | 404 KiB | 5 Q