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.)

View test history (1) Run this test again Return to test menu

Result: Discarded

The test labeled "chr()" was the faster by 0.0144 seconds, (2.210% faster)

chr() 100%
literal 97.79%

The chr() test took 0.6354 seconds.
The literal test took 0.6498 seconds.


Each test case ran 20 random code order iterations consisting of 139,531 loops for a total of 2,790,620 runs.

  • Line execution difference (0.000005) milliseconds.
  • Avg difference (0.718) milliseconds per 139,531 loops.
  • Total difference 14.36 milliseconds for 2,790,620 loops

The iteration variablity for Code 1 was (4.8849) milliseconds and Code 2 was (4.2553) 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 (