Test: stripos vs. strtolower(substr)

Case insensitive search a string for a set of characters.

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Result: Discarded

The test labeled "strtolower(substr())" was the faster by 0.0915 seconds, (7.977% faster)

strtolower(substr()) 100%

stripos() 92.023%

The strtolower(substr()) test took 1.0555 seconds.
The stripos() test took 1.147 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 293,000 loops for a total of 5,860,000 runs.

Line execution difference (0.000016) milliseconds.
Avg difference (4.575) milliseconds per 293,000 loops.
Total difference 91.50 milliseconds for 5,860,000 loops

The iteration variablity for Code 1 was (9.1856) milliseconds and Code 2 was (1.5035) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = stripos($GLOBALS['dummy'], 'xyz') != '';

The second test, "strtolower(substr())", was:

for ($j = 0; $j < 100; $j++)
	$GLOBALS['dummy2'] = strtolower(substr($GLOBALS['dummy'], 24, 4) == 'xyz');

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