PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: defined vs. isset

No Description

Run this test again Return to test menu

Historical Results

Based on (1) saved test runs, The test labeled "isset()" was (on average) the faster by 0.029 seconds, (4.493% faster)

isset() 100%
defined() 95.507%

The isset() test took 0.6167 seconds.
The defined() test took 0.6458 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 143,016 loops for a total of 2,860,320 runs.

  • Line execution difference (0.000010) milliseconds.
  • Avg difference (0.000) milliseconds per 143,016 loops.
  • Total difference 29.02 milliseconds for 2,860,320 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, "defined()", was:

$GLOBALS['test'] = defined('CONSTANT');

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

$GLOBALS['test'] = isset($GLOBALS['CONSTANT']);

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)