Test: strncmp vs. strpos (long)

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

Historical Results

Based on (2) saved test runs, The test labeled "strncmp()" was (on average) the faster by 0.0059 seconds, (0.780% faster)

strncmp() 100%

strpos() 99.22%

The strncmp() test took 0.7528 seconds.
The strpos() test took 0.7587 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 209,471 loops for a total of 4,189,410 runs.

Line execution difference (0.000001) milliseconds.
Avg difference (0.000) milliseconds per 209,471 loops.
Total difference 5.92 milliseconds for 4,189,410 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, "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;

PHP Benchmarks