PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: preg_replace vs. str_replace

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Result: Discarded

The test labeled "preg_replace()" was the faster by 0.0809 seconds, (10.582% faster)

preg_replace() 100%
str_replace() 89.418%

The preg_replace() test took 0.6839 seconds.
The str_replace() test took 0.7648 seconds.


Each test case ran 20 random code order iterations consisting of 176,509 loops for a total of 3,530,180 runs.

  • Line execution difference (0.000023) milliseconds.
  • Avg difference (4.046) milliseconds per 176,509 loops.
  • Total difference 80.93 milliseconds for 3,530,180 loops

The iteration variablity for Code 1 was (2.4176) milliseconds and Code 2 was (5.1092) 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 (