PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: using constants vs. variables

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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.

Nitty-Gritty

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.

Code

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 (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)