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run code in 300+ PHP versions simultaneously
<?php function someOp($i) { usleep(1); return $i; } $arr = array_fill(0, 1000, ''); $newarr = []; $start_time = microtime(true); $newarr = array_map('someOp', $arr); $time = microtime(true) - $start_time; echo $time."\n";

preferences:
37.55 ms | 402 KiB | 5 Q