PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach vs. for

Note that this isn't helpful unless you have ascending int keys.

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Historical Results

Based on (1) saved test runs, The test labeled "for" was (on average) the faster by 0.0022 seconds, (0.477% faster)

for 100%
foreach 99.523%

The for test took 0.4657 seconds.
The foreach test took 0.468 seconds.


Each test case ran 20 random code order iterations consisting of 108,625 loops for a total of 2,172,500 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.000) milliseconds per 108,625 loops.
  • Total difference 2.23 milliseconds for 2,172,500 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, "foreach", was:

foreach ($GLOBALS['dummy'] as $v)
	$v[0] + 1;

The second test, "for", was:

for ($k = 0, $n = count($GLOBALS['dummy']); $k < $n; $k++)
	$GLOBALS['dummy'][$k][0] + 1;

Running: Linux (x86_64:1 GB) PHP (