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 (5) Run this test again Return to test menu

Result: Discarded

The test labeled "unpack()" was the faster by 0.0014 seconds, (0.127% faster)

unpack() 100%
ord() 99.873%

The unpack() test took 1.1132 seconds.
The ord() test took 1.1146 seconds.


Each test case ran 20 random code order iterations consisting of 286,496 loops for a total of 5,729,920 runs.

  • Line execution difference (0.000000) milliseconds.
  • Avg difference (0.071) milliseconds per 286,496 loops.
  • Total difference 1.41 milliseconds for 5,729,920 loops

The iteration variablity for Code 1 was (3.9859) milliseconds and Code 2 was (2.5503) 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 (