PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: defined vs. isset

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Result: Discarded

The test labeled "isset()" was the faster by 0.1778 seconds, (13.870% faster)

isset() 100%
defined() 86.13%

The isset() test took 1.1041 seconds.
The defined() test took 1.2819 seconds.


Each test case ran 20 random code order iterations consisting of 289,162 loops for a total of 5,783,240 runs.

  • Line execution difference (0.000031) milliseconds.
  • Avg difference (8.890) milliseconds per 289,162 loops.
  • Total difference 177.80 milliseconds for 5,783,240 loops

The iteration variablity for Code 1 was (10.5314) milliseconds and Code 2 was (2.5974) 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 (