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run code in 300+ PHP versions simultaneously
<?php $t = microtime(true); $array = []; for($i = 0; $i < 1000000; $i++) { $array[] = $i; } print "[] ".(microtime(true) - $t); print "\n"; $t = microtime(true); $array = []; for($i = 0; $i < 1000000; $i++) { array_push($array, $i); } print "array_push ".(microtime(true) - $t);

preferences:
120.07 ms | 405 KiB | 5 Q