PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: include_once vs. function_exists

No Description

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "include_once" was the faster by 0.0661 seconds, (7.385% faster)

include_once 100%
function_exists() 92.615%

The include_once test took 0.8285 seconds.
The function_exists() test took 0.8946 seconds.


Each test case ran 20 random code order iterations consisting of 213,559 loops for a total of 4,271,180 runs.

  • Line execution difference (0.000015) milliseconds.
  • Avg difference (3.303) milliseconds per 213,559 loops.
  • Total difference 66.07 milliseconds for 4,271,180 loops

The iteration variablity for Code 1 was (2.1913) milliseconds and Code 2 was (5.6439) 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 (