<pre> <? function foo($in = false) {} function test($in) { $start = microtime(true); for ($i = 0; $i < 10000; $i++) { foo(!!$in); } echo ((microtime(true) - $start) / 1000)."\n"; } function test2($in) { $start = microtime(true); for ($i = 0; $i < 10000; $i++) { foo((boolean)$in); } echo ((microtime(true) - $start) / 1000)."\n"; } test($tmp); test2($tmp); echo "\n"; $tmp = false; test($tmp); test2($tmp); echo "\n"; $tmp = '0'; test($tmp); test2($tmp); <?php
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