PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach key vs. no key

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Historical Results

Based on (3) saved test runs, The test labeled "with key" was (on average) the faster by 0.0039 seconds, (0.425% faster)

with key 100%
without key 99.575%

The with key test took 0.9221 seconds.
The without key test took 0.926 seconds.


Each test case ran 20 random code order iterations consisting of 224,275 loops for a total of 4,485,507 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.000) milliseconds per 224,275 loops.
  • Total difference 3.94 milliseconds for 4,485,507 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, "with key", was:

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

The second test, "without key", was:

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

Running: Linux (x86_64:1 GB) PHP (