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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Historical Results

Based on (21) saved test runs, The test labeled "strtr()" was (on average) the faster by 0.011 seconds, (1.289% faster)

strtr() 100%
str_replace() 98.711%

The strtr() test took 0.8429 seconds.
The str_replace() test took 0.8539 seconds.


Each test case ran 20 random code order iterations consisting of 216,733 loops for a total of 4,334,663 runs.

  • Line execution difference (0.000003) milliseconds.
  • Avg difference (0.000) milliseconds per 216,733 loops.
  • Total difference 11.01 milliseconds for 4,334,663 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, "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 (