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 "defined()" was (on average) the faster by 0.0207 seconds, (3.373% faster)

defined() 100%
isset() 96.627%

The defined() test took 0.5916 seconds.
The isset() test took 0.6123 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 161,552 loops for a total of 3,231,040 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 161,552 loops.
  • Total difference 20.65 milliseconds for 3,231,040 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 (7.2.19-1+ubuntu16.04.1+deb.sury.org+1)