Online PHP editor | refs for DQ2fb

<?php /** * @param array $functions An associative array of closures to benchmark * @param int $iterations The number of iterations */ function benchmark($functions, $iterations) { foreach ($functions as $name => $function) { $start = microtime(true); for ($i = 0; $i < $iterations; $i++) { call_user_func($function); } $delta = microtime(true) - $start; echo "$name: " . $delta . "\n"; } } echo "\nBenchmarking \"(array) \$var === \$var\" vs \"is_array(\$var)\" ...\n"; $data = array( 'string', // Not an array array(1, 2, 3), // Small array array_fill(1, 1000, uniqid()) // Large-ish array ); benchmark(array( 'casting' => function () use ($data) { foreach ($data as $d) { $result = (array) $d === $d; } }, 'is_array' => function () use ($data) { foreach ($data as $d) { $result = is_array($d); } } ), 1000); echo "\nBenchmarking \"count(\$var) == 0\" vs \"empty(\$var)\" ...\n"; $data = range(1, 100000); benchmark(array( 'count()' => function () use ($data) { $result = count($data) == 0; }, 'empty()' => function () use ($data) { $result = empty($data); } ), 100000); echo "\nBenchmarking \"array_key_exists(\$key, \$array)\" vs \"\$array[\$key]\" ...\n"; $data = array_fill_keys(range(1, 1000), uniqid()); benchmark(array( 'in_array_keys()' => function () use ($data) { $result = array_key_exists(50, $data) ? : null; }, 'key check' => function () use ($data) { $result = $data[50] ? : null; } ), 100000);