PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach (fcall) vs. foreach ($temp)

Is the array being iterated cached? It could cause some nasty side effects to OOP if it is, but maybe PHP is smart about this.

View test history (6) Run this test again Return to test menu

Result: Discarded

The test labeled "foreach ($temp)" was the faster by 0.013 seconds, (1.009% faster)

foreach ($temp) 100%
foreach (fcall) 98.991%

The foreach ($temp) test took 1.2732 seconds.
The foreach (fcall) test took 1.2862 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 256,453 loops for a total of 5,129,060 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.649) milliseconds per 256,453 loops.
  • Total difference 12.98 milliseconds for 5,129,060 loops

The iteration variablity for Code 1 was (4.8332) milliseconds and Code 2 was (6.9082) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "foreach (fcall)", was:

foreach (array_merge(range(1, 10), range(11, 20), range(21, 30), range(31, 40)) as $v)
	$GLOBALS['dummy2'] = $v;

The second test, "foreach ($temp)", was:

$temp = array_merge(range(1, 10), range(11, 20), range(21, 30), range(31, 40));
foreach ($temp as $v)
	$GLOBALS['dummy2'] = $v;

Running: Linux (x86_64:1 GB) PHP (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)