PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: redefine constant

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Historical Results

Based on (1) saved test runs, The test labeled "@define()" was (on average) the faster by 0.0181 seconds, (1.728% faster)

@define() 100%
!defined() 98.272%

The @define() test took 1.029 seconds.
The !defined() test took 1.0471 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 291,271 loops for a total of 5,825,420 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 291,271 loops.
  • Total difference 18.09 milliseconds for 5,825,420 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.

Code

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 (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)