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run code in 300+ PHP versions simultaneously
<?php class Main { private $N; public function run() { $this->N = 77777777; $string = ''; for ( $i = $this->N; $i --> 0; ) { $string .= ' '; } } public function getTime() { $mtime = microtime(); $mtime = explode( ' ', $mtime ); $mtime = $mtime[1] + $mtime[0]; return $mtime; } } $Main = new Main(); $start = $Main->getTime(); $Main->run(); $end = $Main->getTime(); echo "Method execution took " . ( $end - $start ) . " seconds";

preferences:
28.99 ms | 402 KiB | 5 Q