PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: redefine constant

No Description

Run this test again Return to test menu

Historical Results

Based on (5) saved test runs, The test labeled "@define()" was (on average) the faster by 0.0084 seconds, (0.945% faster)

@define() 100%
!defined() 99.055%

The @define() test took 0.8804 seconds.
The !defined() test took 0.8888 seconds.


Each test case ran 20 random code order iterations consisting of 220,437 loops for a total of 4,408,748 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 220,437 loops.
  • Total difference 8.40 milliseconds for 4,408,748 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, "@define()", was:

@define('CONSTANT', $GLOBALS['dummy']);

The second test, "!defined()", was:

if (!defined('CONSTANT'))
	define('CONSTANT', $GLOBALS['dummy']);

Running: Linux (x86_64:1 GB) PHP (