PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: ord v. unpack (str keys)

Does unpack (with its strange format string) go any faster than creating your own associative array?

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "ord()" was the faster by 0.0718 seconds, (10.500% faster)

ord() 100%
unpack() 89.5%

The ord() test took 0.6122 seconds.
The unpack() test took 0.6841 seconds.


Each test case ran 20 random code order iterations consisting of 136,500 loops for a total of 2,730,000 runs.

  • Line execution difference (0.000026) milliseconds.
  • Avg difference (3.592) milliseconds per 136,500 loops.
  • Total difference 71.83 milliseconds for 2,730,000 loops

The iteration variablity for Code 1 was (3.7545) milliseconds and Code 2 was (4.6521) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "ord()", was:

$GLOBALS['dummy'] = array(
	'a' => ord($GLOBALS['packed']{0}),
	'b' => ord($GLOBALS['packed']{1}),
	'c' => ord($GLOBALS['packed']{2}),
	'd' => ord($GLOBALS['packed']{3}),

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

$GLOBALS['dummy'] = unpack('Ca/Cb/Cc/Cd', $GLOBALS['packed']);

Running: Linux (x86_64:1 GB) PHP (