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.

Run this test again Return to test menu

Historical Results

Based on (5) saved test runs, The test labeled "str_ireplace" was (on average) the faster by 0.0228 seconds, (3.107% faster)

str_ireplace 100%
str_replace/strtolower 96.893%

The str_ireplace test took 0.7095 seconds.
The str_replace/strtolower test took 0.7323 seconds.


Each test case ran 20 random code order iterations consisting of 174,587 loops for a total of 3,491,748 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (0.000) milliseconds per 174,587 loops.
  • Total difference 22.75 milliseconds for 3,491,748 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, "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 (