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 0.0593 seconds, (6.669% faster)

unpack() 100%
ord() 93.331%

The unpack() test took 0.8306 seconds.
The ord() test took 0.8899 seconds.


Each test case ran 20 random code order iterations consisting of 180,964 loops for a total of 3,619,280 runs.

  • Line execution difference (0.000016) milliseconds.
  • Avg difference (2.967) milliseconds per 180,964 loops.
  • Total difference 59.35 milliseconds for 3,619,280 loops

The iteration variablity for Code 1 was (5.3690) milliseconds and Code 2 was (4.1413) 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 (