PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach $k => $dummy vs. array_keys

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Result: Discarded

The test labeled "array_keys()" was the faster by 0.0042 seconds, (0.275% faster)

array_keys() 100%
$k => $dummy 99.725%

The array_keys() test took 1.5229 seconds.
The $k => $dummy test took 1.5271 seconds.


Each test case ran 20 random code order iterations consisting of 281,449 loops for a total of 5,628,980 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.210) milliseconds per 281,449 loops.
  • Total difference 4.20 milliseconds for 5,628,980 loops

The iteration variablity for Code 1 was (14.5809) milliseconds and Code 2 was (13.8953) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "$k => $dummy", was:

foreach ($GLOBALS['dummy'] as $k => $dummy)
	$k + 1;

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

foreach (array_keys($GLOBALS['dummy']) as $k)
	$k + 1;

Running: Linux (x86_64:1 GB) PHP (