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: Saved

The test labeled "unpack()" was the faster by 0.0041 seconds, (0.750% faster)

unpack() 100%

ord() 99.25%

The unpack() test took 0.5412 seconds.
The ord() test took 0.5452 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 129,985 loops for a total of 2,599,700 runs.

Line execution difference (0.000002) milliseconds.
Avg difference (0.205) milliseconds per 129,985 loops.
Total difference 4.09 milliseconds for 2,599,700 loops

The iteration variablity for Code 1 was (1.9476) milliseconds and Code 2 was (1.8228) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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']);

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