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 (3) Run this test again Return to test menu

Result: Saved

The test labeled "ord()" was the faster by 0.026 seconds, (2.724% faster)

ord() 100%
unpack() 97.276%

The ord() test took 0.9282 seconds.
The unpack() test took 0.9542 seconds.


Each test case ran 20 random code order iterations consisting of 233,568 loops for a total of 4,671,360 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (1.300) milliseconds per 233,568 loops.
  • Total difference 25.99 milliseconds for 4,671,360 loops

The iteration variablity for Code 1 was (3.4204) milliseconds and Code 2 was (3.3709) 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 (