PHP Benchmarks

Performance comparison of PHP code alternatives.

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

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Historical Results

Based on (1) saved test runs, The test labeled "array_keys()" was (on average) the faster by 0.0311 seconds, (2.366% faster)

array_keys() 100%
$k => $dummy 97.634%

The array_keys() test took 1.2849 seconds.
The $k => $dummy test took 1.3161 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 281,402 loops for a total of 5,628,040 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 281,402 loops.
  • Total difference 31.14 milliseconds for 5,628,040 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, "$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 (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)