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.

Run this test again Return to test menu

Result: Discarded

The test labeled "substr_compare" was the faster by 0.0149 seconds, (2.422% faster)

substr_compare 100%
strpos 97.578%

The substr_compare test took 0.6019 seconds.
The strpos test took 0.6169 seconds.


Each test case ran 20 random code order iterations consisting of 145,383 loops for a total of 2,907,660 runs.

  • Line execution difference (0.000005) milliseconds.
  • Avg difference (0.747) milliseconds per 145,383 loops.
  • Total difference 14.94 milliseconds for 2,907,660 loops

The iteration variablity for Code 1 was (4.5041) milliseconds and Code 2 was (5.5107) 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 (