PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: include_once vs. function_exists

No Description

View test history (3) Run this test again Return to test menu

Result: Discarded

The test labeled "include_once" was the faster by 0.0695 seconds, (9.091% faster)

include_once 100%
function_exists() 90.909%

The include_once test took 0.6952 seconds.
The function_exists() test took 0.7647 seconds.


Each test case ran 20 random code order iterations consisting of 170,847 loops for a total of 3,416,940 runs.

  • Line execution difference (0.000020) milliseconds.
  • Avg difference (3.476) milliseconds per 170,847 loops.
  • Total difference 69.52 milliseconds for 3,416,940 loops

The iteration variablity for Code 1 was (3.9510) milliseconds and Code 2 was (6.4172) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "include_once", was:



The second test, "function_exists()", was:


if (!function_exists('f2'))

Running: Linux (x86_64:1 GB) PHP (