Test: strncmp vs. strpos (long)

2000 character string, check if a substring exists in a defined location, both pass and fail paths.

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Result: Discarded

The test labeled "strpos()" was the faster by 0.0237 seconds, (3.312% faster)

strpos() 100%

strncmp() 96.688%

The strpos() test took 0.6913 seconds.
The strncmp() test took 0.7149 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 153,007 loops for a total of 3,060,140 runs.

Line execution difference (0.000008) milliseconds.
Avg difference (1.184) milliseconds per 153,007 loops.
Total difference 23.68 milliseconds for 3,060,140 loops

The iteration variablity for Code 1 was (7.5019) milliseconds and Code 2 was (4.9177) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

The first test, "strncmp()", was:

for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strncmp($GLOBALS['dummy_match'], '01234', 5) === 0;
for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strncmp($GLOBALS['dummy_fail'], '01234', 5) === 0;

The second test, "strpos()", was:

for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strpos($GLOBALS['dummy_match'], '01234') === 0;
for ($j = 0; $j < 40; $j++)
	$GLOBALS['dummy'] = strpos($GLOBALS['dummy_fail'], '01234') === 0;

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