PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: strtr vs. str_replace on long strings

String replacement performance on a 37,500 character string.

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Result: Discarded

The test labeled "str_replace()" was the faster by 0.0293 seconds, (4.608% faster)

str_replace() 100%
strtr() 95.392%

The str_replace() test took 0.6061 seconds.
The strtr() test took 0.6354 seconds.


Each test case ran 20 random code order iterations consisting of 169,621 loops for a total of 3,392,420 runs.

  • Line execution difference (0.000009) milliseconds.
  • Avg difference (1.464) milliseconds per 169,621 loops.
  • Total difference 29.28 milliseconds for 3,392,420 loops

The iteration variablity for Code 1 was (3.8574) milliseconds and Code 2 was (0.8980) 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 (