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run code in 300+ PHP versions simultaneously
<?php $data = str_repeat('abcde', 500000); $insertion = 'abc'; $position = 0; $data = substr($data, 0, $position) . $insertion . substr($data, $position); echo memory_get_peak_usage(), "\n";
Output for git.master
5392312
Output for git.master_jit
5351776
Output for rfc.property-hooks
5392280

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