Test: function vs. class method

Tests for any difference between calling a free function or a member function.

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Result: Discarded

The test labeled "function" was the faster by 0.0218 seconds, (3.918% faster)

function 100%

class method 96.082%

The function test took 0.5335 seconds.
The class method test took 0.5552 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 131,421 loops for a total of 2,628,420 runs.

Line execution difference (0.000008) milliseconds.
Avg difference (1.088) milliseconds per 131,421 loops.
Total difference 21.75 milliseconds for 2,628,420 loops

The iteration variablity for Code 1 was (3.1877) milliseconds and Code 2 was (3.0314) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "class method", was:

/*
class Example
{
	var $x;

	function foo()
	{
		$this->x = 42;

		return 42;
	}
}
*/

$test = new Example();

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy'] = $test->foo();

The second test, "function", was:

/*
function example_foo(&$array)
{
	$array['x'] = 42;

	return 42;
}
*/

$test = array();

for ($i = 0; $i < 100; $i++)
	$GLOBALS['dummy'] = example_foo($test);

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