Test: create_function vs. func callback

Using a pre-created function, is there any penalty in calling it versus a regular free function using a callback?

Run this test again Return to test menu

Result: Discarded

The test labeled "create_function()" was the faster by 0.0456 seconds, (7.462% faster)

create_function() 100%

regular callback 92.538%

The create_function() test took 0.5658 seconds.
The regular callback test took 0.6115 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 128,580 loops for a total of 2,571,600 runs.

Line execution difference (0.000018) milliseconds.
Avg difference (2.281) milliseconds per 128,580 loops.
Total difference 45.63 milliseconds for 2,571,600 loops

The iteration variablity for Code 1 was (1.5063) milliseconds and Code 2 was (2.7794) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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

/*
$GLOBALS['dummy'] = create_function('', '
	$x = 0;
	$x += 5;

	if ($x >= 5)
		$x = 0;

	$x;
	$x;');
*/

$GLOBALS['dummy']();

The second test, "regular callback", was:

/*
function dummy()
{
	$x = 0;
	$x += 5;

	if ($x >= 5)
		$x = 0;

	$x;
	$x;
}
$GLOBALS['dummy_cb'] = 'dummy';
*/

$GLOBALS['dummy_cb']();

PHP Benchmarks