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 (4) saved test runs, The test labeled "constants" was (on average) the faster by 0.0168 seconds, (1.891% faster)

constants 100%
variables 98.109%

The constants test took 0.8695 seconds.
The variables test took 0.8863 seconds.


Each test case ran 20 random code order iterations consisting of 209,951 loops for a total of 4,199,015 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (0.000) milliseconds per 209,951 loops.
  • Total difference 16.76 milliseconds for 4,199,015 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 (