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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Historical Results

Based on (3) saved test runs, The test labeled "substr_compare" was (on average) the faster by 0.0042 seconds, (0.613% faster)

substr_compare 100%
strpos 99.387%

The substr_compare test took 0.6816 seconds.
The strpos test took 0.6858 seconds.


Each test case ran 20 random code order iterations consisting of 138,372 loops for a total of 2,767,440 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 138,372 loops.
  • Total difference 4.21 milliseconds for 2,767,440 loops

The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) 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 (