PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: array_map vs. array_walk

array_walk() can change an array in place. Is this faster than creating a separate one with array_map()?

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Historical Results

Based on (2) saved test runs, The test labeled "array_walk()" was (on average) the faster by 0.0264 seconds, (2.555% faster)

array_walk() 100%
array_map() 97.445%

The array_walk() test took 1.0063 seconds.
The array_map() test took 1.0327 seconds.


Each test case ran 20 random code order iterations consisting of 231,787 loops for a total of 4,635,730 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 231,787 loops.
  • Total difference 26.38 milliseconds for 4,635,730 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.


The first test, "array_map()", was:

function foo_map($v)
	return $v + 1;

$GLOBALS['dummy'] = array_map('foo_map', $GLOBALS['dummy']);

The second test, "array_walk()", was:

function foo_walk(&$v)
	$v = $v + 1;

array_walk($GLOBALS['dummy'], 'foo_walk');

Running: Linux (x86_64:1 GB) PHP (