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 (3) saved test runs, The test labeled "str_replace/strtolower" was (on average) the faster by 0.0139 seconds, (1.676% faster)

str_replace/strtolower 100%
str_ireplace 98.324%

The str_replace/strtolower test took 0.8165 seconds.
The str_ireplace test took 0.8305 seconds.


Each test case ran 20 random code order iterations consisting of 183,141 loops for a total of 3,662,820 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (0.000) milliseconds per 183,141 loops.
  • Total difference 13.92 milliseconds for 3,662,820 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 (