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

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Result: Saved

The test labeled "strtr()" was the faster by 0.0127 seconds, (1.896% faster)

strtr() 100%
str_replace() 98.104%

The strtr() test took 0.6579 seconds.
The str_replace() test took 0.6706 seconds.


Each test case ran 20 random code order iterations consisting of 164,401 loops for a total of 3,288,020 runs.

  • Line execution difference (0.000004) milliseconds.
  • Avg difference (0.636) milliseconds per 164,401 loops.
  • Total difference 12.72 milliseconds for 3,288,020 loops

The iteration variablity for Code 1 was (1.4225) milliseconds and Code 2 was (1.3631) 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 (