PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: foreach reference writing

No Description

View test history (7) Run this test again Return to test menu

Result: Discarded

The test labeled "non-referenced" was the faster by 0.1009 seconds, (8.223% faster)

non-referenced 100%
referenced 91.777%

The non-referenced test took 1.126 seconds.
The referenced test took 1.2269 seconds.


Each test case ran 20 random code order iterations consisting of 279,620 loops for a total of 5,592,400 runs.

  • Line execution difference (0.000018) milliseconds.
  • Avg difference (5.044) milliseconds per 279,620 loops.
  • Total difference 100.88 milliseconds for 5,592,400 loops

The iteration variablity for Code 1 was (6.0546) milliseconds and Code 2 was (11.8996) 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)

The second test, "referenced", was:

foreach ($GLOBALS['dummy'] as $k => &$v)

Running: Linux (x86_64:1 GB) PHP (