PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: using constants vs. variables

No Description

Run this test again Return to test menu

Historical Results

Based on (1) saved test runs, The test labeled "variables" was (on average) the faster by 0.0031 seconds, (0.303% faster)

variables 100%
constants 99.697%

The variables test took 1.0083 seconds.
The constants test took 1.0113 seconds.


Each test case ran 20 random code order iterations consisting of 274,227 loops for a total of 5,484,540 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.000) milliseconds per 274,227 loops.
  • Total difference 3.06 milliseconds for 5,484,540 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, "constants", was:

$GLOBALS['test'] = CONSTANT + 1;

The second test, "variables", was:

$GLOBALS['test'] = $GLOBALS['CONSTANT'] + 1;

Running: Linux (x86_64:1 GB) PHP (