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<?php $size = pow(2, 16); // 16 is just an example, could also be 15 or 17 $startTime = microtime(true); $array = array(); for ($key = 0, $maxKey = ($size - 1) * $size; $key <= $maxKey; $key += $size) { $array[$key] = 0; } $endTime = microtime(true); echo 'Inserting ', $size, ' evil elements took ', $endTime - $startTime, ' seconds', "\n"; $startTime = microtime(true); $array = array(); for ($key = 0, $maxKey = $size - 1; $key <= $maxKey; ++$key) { $array[$key] = 0; } $endTime = microtime(true); echo 'Inserting ', $size, ' good elements took ', $endTime - $startTime, ' seconds', "\n";
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