PHP Benchmarks

Performance comparison of PHP code alternatives.

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

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Result: Saved

The test labeled "$k => $dummy" was the faster by 0.0372 seconds, (6.519% faster)

$k => $dummy 100%
array_keys() 93.481%

The $k => $dummy test took 0.5335 seconds.
The array_keys() test took 0.5707 seconds.


Each test case ran 20 random code order iterations consisting of 126,735 loops for a total of 2,534,700 runs.

  • Line execution difference (0.000015) milliseconds.
  • Avg difference (1.860) milliseconds per 126,735 loops.
  • Total difference 37.20 milliseconds for 2,534,700 loops

The iteration variablity for Code 1 was (2.0492) milliseconds and Code 2 was (2.1371) 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 (