PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: chr v. literal

How much worse is chr() than just a literal (if it's cleanly representable.)

Run this test again Return to test menu

Result: Discarded

The test labeled "literal" was the faster by 0.1353 seconds, (11.382% faster)

literal 100%
chr() 88.618%

The literal test took 1.0535 seconds.
The chr() test took 1.1889 seconds.


Each test case ran 20 random code order iterations consisting of 290,112 loops for a total of 5,802,240 runs.

  • Line execution difference (0.000023) milliseconds.
  • Avg difference (6.766) milliseconds per 290,112 loops.
  • Total difference 135.32 milliseconds for 5,802,240 loops

The iteration variablity for Code 1 was (12.8064) milliseconds and Code 2 was (3.1557) milliseconds. The lower and the closer together there values are the more accurate the results are.


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

$GLOBALS['dummy'] = chr(65);

The second test, "literal", was:

$GLOBALS['dummy'] = 'A';

Running: Linux (x86_64:1 GB) PHP (