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 (1) saved test runs, The test labeled "strpos" was (on average) the faster by 0.0193 seconds, (1.570% faster)

strpos 100%
substr_compare 98.43%

The strpos test took 1.2071 seconds.
The substr_compare test took 1.2263 seconds.


Each test case ran 20 random code order iterations consisting of 294,285 loops for a total of 5,885,700 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 294,285 loops.
  • Total difference 19.25 milliseconds for 5,885,700 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 (