PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: include_once vs. function_exists

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Result: Discarded

The test labeled "include_once" was the faster by 0.0097 seconds, (1.771% faster)

include_once 100%
function_exists() 98.229%

The include_once test took 0.5376 seconds.
The function_exists() test took 0.5473 seconds.


Each test case ran 20 random code order iterations consisting of 142,518 loops for a total of 2,850,360 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.485) milliseconds per 142,518 loops.
  • Total difference 9.69 milliseconds for 2,850,360 loops

The iteration variablity for Code 1 was (1.9470) milliseconds and Code 2 was (2.6041) 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 (