PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach reference reading

No Description

View test history (3) Run this test again Return to test menu

Result: Saved

The test labeled "referenced" was the faster by 0.0028 seconds, (0.417% faster)

referenced 100%
non-referenced 99.583%

The referenced test took 0.6663 seconds.
The non-referenced test took 0.6691 seconds.


Each test case ran 20 random code order iterations consisting of 121,538 loops for a total of 2,430,760 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.139) milliseconds per 121,538 loops.
  • Total difference 2.79 milliseconds for 2,430,760 loops

The iteration variablity for Code 1 was (6.7740) milliseconds and Code 2 was (6.8662) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "non-referenced", was:

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

The second test, "referenced", was:

foreach ($GLOBALS['dummy'] as $k => &$v)
	$v[0] + 1;

Running: Linux (x86_64:1 GB) PHP (