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?

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Result: Discarded

The test labeled "ord()" was the faster by 0.0238 seconds, (3.656% faster)

ord() 100%
unpack() 96.344%

The ord() test took 0.6278 seconds.
The unpack() test took 0.6516 seconds.


Each test case ran 20 random code order iterations consisting of 139,415 loops for a total of 2,788,300 runs.

  • Line execution difference (0.000009) milliseconds.
  • Avg difference (1.191) milliseconds per 139,415 loops.
  • Total difference 23.82 milliseconds for 2,788,300 loops

The iteration variablity for Code 1 was (5.9873) milliseconds and Code 2 was (4.1137) 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 (