PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: str_ireplace vs. strtolower + str_replace

Replace a string, regardless of its case, with an uppercase variant. 10 replacements in a 750 character line. str_replace/strtolower does not preserve existing case of the rest of the string.

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "str_ireplace" was the faster by 0.0648 seconds, (6.031% faster)

str_ireplace 100%
str_replace/strtolower 93.969%

The str_ireplace test took 1.009 seconds.
The str_replace/strtolower test took 1.0738 seconds.


Each test case ran 20 random code order iterations consisting of 258,947 loops for a total of 5,178,940 runs.

  • Line execution difference (0.000013) milliseconds.
  • Avg difference (3.238) milliseconds per 258,947 loops.
  • Total difference 64.76 milliseconds for 5,178,940 loops

The iteration variablity for Code 1 was (2.7229) milliseconds and Code 2 was (5.1404) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "str_ireplace", was:

str_ireplace('sTrIng', 'STRING!', $GLOBALS['dummy']);

The second test, "str_replace/strtolower", was:

str_replace('string', 'STRING!', strtolower($GLOBALS['dummy']));

Running: Linux (x86_64:1 GB) PHP (