PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach reference reading

No Description

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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.

Nitty-Gritty

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.

Code

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

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

The second test, "referenced", was:

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

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)