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run code in 300+ PHP versions simultaneously
<?php $s = microtime(true); for ($i = 0; $i < 1000; $i++) strtr('React/Controller/Website/User', '/', '_'); printf('%.09f', microtime(true) - $s); echo "<br>"; $s = microtime(true); for ($i = 0; $i < 1000; $i++) str_replace('/', '_', 'React/Controller/Website/User'); printf('%.09f', microtime(true) - $s);

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33.95 ms | 402 KiB | 5 Q