PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: substr_compare vs strpos

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

View test history (23) Run this test again Return to test menu

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.


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.


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;

Running: Linux (x86_64:1 GB) PHP (