PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: preg_replace vs. str_replace

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Result: Discarded

The test labeled "str_replace()" was the faster by 0.003 seconds, (0.283% faster)

str_replace() 100%
preg_replace() 99.717%

The str_replace() test took 1.0435 seconds.
The preg_replace() test took 1.0464 seconds.


Each test case ran 20 random code order iterations consisting of 278,923 loops for a total of 5,578,460 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.148) milliseconds per 278,923 loops.
  • Total difference 2.96 milliseconds for 5,578,460 loops

The iteration variablity for Code 1 was (1.8865) milliseconds and Code 2 was (1.4628) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "preg_replace()", was:

$GLOBALS['dummy2'] = preg_replace('~([Ww]heat|[Tt]hins)~', 'Nilla', $GLOBALS['dummy']);

The second test, "str_replace()", was:

$GLOBALS['dummy2'] = str_replace(array('Wheat', 'Thins', 'wheat', 'thins'), 'Nilla', $GLOBALS['dummy']);

Running: Linux (x86_64:1 GB) PHP (