Test: substr_compare vs strpos

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

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Result: Saved

The test labeled "strpos" was the faster by 0.0076 seconds, (1.243% faster)

strpos 100%

substr_compare 98.757%

The strpos test took 0.6046 seconds.
The substr_compare test took 0.6122 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 127,583 loops for a total of 2,551,660 runs.

Line execution difference (0.000003) milliseconds.
Avg difference (0.380) milliseconds per 127,583 loops.
Total difference 7.61 milliseconds for 2,551,660 loops

The iteration variablity for Code 1 was (4.0909) milliseconds and Code 2 was (4.1111) 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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