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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Historical Results

Based on (2) saved test runs, The test labeled "ord()" was (on average) the faster by 0.0178 seconds, (2.413% faster)

ord() 100%
unpack() 97.587%

The ord() test took 0.7192 seconds.
The unpack() test took 0.737 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 144,138 loops for a total of 2,882,750 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.000) milliseconds per 144,138 loops.
  • Total difference 17.79 milliseconds for 2,882,750 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) 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']);

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)