PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: define constants vs. variables

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Result: Discarded

The test labeled "constants" was the faster by 0.0777 seconds, (7.374% faster)

constants 100%
variables 92.626%

The constants test took 0.9755 seconds.
The variables test took 1.0532 seconds.


Each test case ran 20 random code order iterations consisting of 243,289 loops for a total of 4,865,780 runs.

  • Line execution difference (0.000016) milliseconds.
  • Avg difference (3.883) milliseconds per 243,289 loops.
  • Total difference 77.67 milliseconds for 4,865,780 loops

The iteration variablity for Code 1 was (5.0158) milliseconds and Code 2 was (9.7030) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "constants", was:

define('CONSTANT' . $GLOBALS['i'], $GLOBALS['x'] . $GLOBALS['y'] . $GLOBALS['z']);

The second test, "variables", was:


Running: Linux (x86_64:1 GB) PHP (