Test: substr_compare vs strpos

4800 character string, check if a substring exists in a defined location.

Historical Results

Based on (1) saved test runs, The test labeled "substr_compare" was (on average) the faster by 0.0055 seconds, (0.834% faster)

substr_compare 100%

strpos 99.166%

The substr_compare test took 0.6555 seconds.
The strpos test took 0.661 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 127,612 loops for a total of 2,552,240 runs.

Line execution difference (0.000002) milliseconds.
Avg difference (0.000) milliseconds per 127,612 loops.
Total difference 5.51 milliseconds for 2,552,240 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, "substr_compare", was:

$test = substr_compare($GLOBALS['dummy'], 'ghi', 6, 3) === 0;

The second test, "strpos", was:

$test = strpos($GLOBALS['dummy'], 'ghi', 6) === 6;

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