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 (3) Run this test again Return to test menu

Result: Discarded

The test labeled "str_replace/strtolower" was the faster by 0.0627 seconds, (5.601% faster)

str_replace/strtolower 100%
str_ireplace 94.399%

The str_replace/strtolower test took 1.0562 seconds.
The str_ireplace test took 1.1189 seconds.


Each test case ran 20 random code order iterations consisting of 290,062 loops for a total of 5,801,240 runs.

  • Line execution difference (0.000011) milliseconds.
  • Avg difference (3.133) milliseconds per 290,062 loops.
  • Total difference 62.67 milliseconds for 5,801,240 loops

The iteration variablity for Code 1 was (6.0246) milliseconds and Code 2 was (2.0233) 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 (