PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: defined vs. isset

No Description

Run this test again Return to test menu

Result: Discarded

The test labeled "defined()" was the faster by 0.0152 seconds, (1.379% faster)

defined() 100%
isset() 98.621%

The defined() test took 1.0904 seconds.
The isset() test took 1.1056 seconds.


Each test case ran 20 random code order iterations consisting of 224,084 loops for a total of 4,481,680 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.762) milliseconds per 224,084 loops.
  • Total difference 15.25 milliseconds for 4,481,680 loops

The iteration variablity for Code 1 was (10.9213) milliseconds and Code 2 was (13.0490) milliseconds. The lower and the closer together there values are the more accurate the results are.


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 (