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.

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Result: Discarded

The test labeled "strpos" was the faster by 0.024 seconds, (4.120% faster)

strpos 100%
substr_compare 95.88%

The strpos test took 0.5578 seconds.
The substr_compare test took 0.5818 seconds.


Each test case ran 20 random code order iterations consisting of 126,783 loops for a total of 2,535,660 runs.

  • Line execution difference (0.000009) milliseconds.
  • Avg difference (1.198) milliseconds per 126,783 loops.
  • Total difference 23.97 milliseconds for 2,535,660 loops

The iteration variablity for Code 1 was (4.6321) milliseconds and Code 2 was (4.8669) 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 (