PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: stripos vs. strtolower(substr)

Case insensitive search a string for a set of characters.

Run this test again Return to test menu

Result: Discarded

The test labeled "stripos()" was the faster by 0.0163 seconds, (2.924% faster)

stripos() 100%
strtolower(substr()) 97.076%

The stripos() test took 0.5422 seconds.
The strtolower(substr()) test took 0.5585 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 141,115 loops for a total of 2,822,300 runs.

  • Line execution difference (0.000006) milliseconds.
  • Avg difference (0.817) milliseconds per 141,115 loops.
  • Total difference 16.33 milliseconds for 2,822,300 loops

The iteration variablity for Code 1 was (1.9312) milliseconds and Code 2 was (2.7317) 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');

Running: Linux (x86_64:1 GB) PHP (7.2.25-1+ubuntu16.04.1+deb.sury.org+1)