PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: strtr vs. str_replace on short strings

The short string in this test is 750 characters long with 10 occurances of the replacement


Result: Discarded

The test labeled "strtr()" was the faster by 0.0472 seconds, (4.403% faster)

strtr() 100%
str_replace() 95.597%

The strtr() test took 1.0241 seconds.
The str_replace() test took 1.0713 seconds.


Each test case ran 20 random code order iterations consisting of 271,081 loops for a total of 5,421,620 runs.

  • Line execution difference (0.000009) milliseconds.
  • Avg difference (2.359) milliseconds per 271,081 loops.
  • Total difference 47.17 milliseconds for 5,421,620 loops

The iteration variablity for Code 1 was (2.0620) milliseconds and Code 2 was (2.8923) milliseconds. The lower and the closer together there values are the more accurate the results are.


The first test, "strtr()", was:

strtr($GLOBALS['dummy'], array('string' => 'STRING!'));

The second test, "str_replace()", was:

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

Running: Linux (x86_64:1 GB) PHP (