PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: strtr vs. str_replace/array_keys on long strings

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Historical Results

Based on (4) saved test runs, The test labeled "strtr()" was (on average) the faster by 0.0041 seconds, (0.631% faster)

strtr() 100%
str_replace()/array_keys() 99.369%

The strtr() test took 0.652 seconds.
The str_replace()/array_keys() test took 0.6561 seconds.


Each test case ran 20 random code order iterations consisting of 164,005 loops for a total of 3,280,095 runs.

  • Line execution difference (0.000001) milliseconds.
  • Avg difference (0.000) milliseconds per 164,005 loops.
  • Total difference 4.14 milliseconds for 3,280,095 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'], $GLOBALS['replacements']);

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

str_replace(array_keys($GLOBALS['replacements']), $GLOBALS['replacements'], $GLOBALS['dummy']);

Running: Linux (x86_64:1 GB) PHP (