Test: create_function vs. closure inside loop

Using create_function vs anonymous lambda function in a loop

Historical Results

Based on (1) saved test runs, The test labeled "create_function()" was (on average) the faster by 0.0268 seconds, (4.226% faster)

create_function() 100%

lambda 95.774%

The create_function() test took 0.6068 seconds.
The lambda test took 0.6335 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 149,930 loops for a total of 2,998,600 runs.

Line execution difference (0.000009) milliseconds.
Avg difference (0.000) milliseconds per 149,930 loops.
Total difference 26.78 milliseconds for 2,998,600 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) 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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