Deprecated: Function create_function() is deprecated in /var/customers/webs/stc/benchmark/include/code_tests.php(51) : eval()'d code on line 2 Test: create_function vs. func callback

PHP Benchmarks

Performance comparison of PHP code alternatives.

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?

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Result: Saved

The test labeled "create_function()" was the faster by 0.1952 seconds, (6.485% faster)

create_function() 100%
regular callback 93.515%

The create_function() test took 2.8154 seconds.
The regular callback test took 3.0106 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 281,261 loops for a total of 5,625,220 runs.

  • Line execution difference (0.000035) milliseconds.
  • Avg difference (9.762) milliseconds per 281,261 loops.
  • Total difference 195.24 milliseconds for 5,625,220 loops

The iteration variablity for Code 1 was (61.5585) milliseconds and Code 2 was (61.4741) 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']();

Running: Linux (x86_64:1 GB) PHP (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)