Test: substr_compare vs strpos

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

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Result: Discarded

The test labeled "substr_compare" was the faster by 0.0127 seconds, (2.448% faster)

substr_compare 100%

strpos 97.552%

The substr_compare test took 0.5065 seconds.
The strpos test took 0.5192 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 142,955 loops for a total of 2,859,100 runs.

Line execution difference (0.000004) milliseconds.
Avg difference (0.636) milliseconds per 142,955 loops.
Total difference 12.71 milliseconds for 2,859,100 loops

The iteration variablity for Code 1 was (0.6617) milliseconds and Code 2 was (1.1745) 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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