PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: define constants vs. variables

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Result: Discarded

The test labeled "variables" was the faster by 0.0418 seconds, (5.813% faster)

variables 100%
constants 94.187%

The variables test took 0.6776 seconds.
The constants test took 0.7194 seconds.


Each test case ran 20 random code order iterations consisting of 133,427 loops for a total of 2,668,540 runs.

  • Line execution difference (0.000016) milliseconds.
  • Avg difference (2.091) milliseconds per 133,427 loops.
  • Total difference 41.82 milliseconds for 2,668,540 loops

The iteration variablity for Code 1 was (5.7350) milliseconds and Code 2 was (5.3280) 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 (