Test: create_function vs. closure inside loop

Using create_function vs anonymous lambda function in a loop

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Result: Discarded

The test labeled "lambda" was the faster by 0.0177 seconds, (1.429% faster)

lambda 100%

create_function() 98.571%

The lambda test took 1.2176 seconds.
The create_function() test took 1.2353 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 277,906 loops for a total of 5,558,120 runs.

Line execution difference (0.000003) milliseconds.
Avg difference (0.883) milliseconds per 277,906 loops.
Total difference 17.66 milliseconds for 5,558,120 loops

The iteration variablity for Code 1 was (9.4927) milliseconds and Code 2 was (8.2142) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "create_function()", was:

$a = $GLOBALS['a'];
for($i = 0; $i < 100; ++$i) {
	$callback = create_function('$n', 'return $n;');
	array_map($callback, $a);
}

The second test, "lambda", was:

$a = $GLOBALS['a'];
for($i = 0; $i < 100; ++$i) {
	$callback2 = function($n) { return $n; };
	array_map($callback2, $a);
}

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