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.

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Historical Results

Based on (2) saved test runs, The test labeled "foreach (fcall)" was (on average) the faster by 0.0241 seconds, (3.078% faster)

foreach (fcall) 100%
foreach ($temp) 96.922%

The foreach (fcall) test took 0.759 seconds.
The foreach ($temp) test took 0.7831 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 207,915 loops for a total of 4,158,290 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 207,915 loops.
  • Total difference 24.11 milliseconds for 4,158,290 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, "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 (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)