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 (3) Run this test again Return to test menu

Result: Discarded

The test labeled "strpos" was the faster by 0.026 seconds, (2.443% faster)

strpos 100%
substr_compare 97.557%

The strpos test took 1.0382 seconds.
The substr_compare test took 1.0642 seconds.


Each test case ran 20 random code order iterations consisting of 267,664 loops for a total of 5,353,280 runs.

  • Line execution difference (0.000005) milliseconds.
  • Avg difference (1.300) milliseconds per 267,664 loops.
  • Total difference 26.00 milliseconds for 5,353,280 loops

The iteration variablity for Code 1 was (2.3312) milliseconds and Code 2 was (1.1621) 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 (