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run code in 300+ PHP versions simultaneously
<?php $i=0; $j=500000; while($i < 60000) { $i++; $j++; $data1[] = md5($i); $data2[] = md5($j); } $time = microtime(true); echo "Starting array_diff\n"; $data_diff1 = array_diff($data1, $data2); $time = microtime(true) - $time; echo 'array_diff() returned ' . count($data_diff1) . " entries\n";

preferences:
31.97 ms | 402 KiB | 5 Q