PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: passing classes vs. arrays

Is there any penalty (either way) in passing class objects vs. arrays? Theoretically, they are semantically equivalent.

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Historical Results

Based on (4) saved test runs, The test labeled "classes" was (on average) the faster by 0.022 seconds, (3.343% faster)

classes 100%
arrays 96.657%

The classes test took 0.6356 seconds.
The arrays test took 0.6576 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 155,394 loops for a total of 3,107,875 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (0.000) milliseconds per 155,394 loops.
  • Total difference 21.98 milliseconds for 3,107,875 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, "classes", was:

/*
class Example
{
	var $x;
}

function example_class($x)
{
	$GLOBALS['dummy'] = $x->x;
}

$GLOBALS['test_object'] = new Example();
$GLOBALS['test_object']->x = 42;
*/

example_class($GLOBALS['test_object']);

The second test, "arrays", was:

/*
function example_array($x)
{
	$GLOBALS['dummy'] = $x['x'];
}

$GLOBALS['test_array'] = array();
$GLOBALS['test_array']['x'] = 42;
*/

example_array($GLOBALS['test_array']);

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)