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

Historical Results

Based on (2) saved test runs, The test labeled "chr()" was (on average) the faster by 0.0097 seconds, (1.153% faster)

chr() 100%
literal 98.847%

The chr() test took 0.8304 seconds.
The literal test took 0.8401 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 232,626 loops for a total of 4,652,520 runs.

  • Line execution difference (0.000002) milliseconds.
  • Avg difference (0.000) milliseconds per 232,626 loops.
  • Total difference 9.69 milliseconds for 4,652,520 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.

Code

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

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

The second test, "literal", was:

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

Running: Linux (x86_64:1 GB) PHP (7.2.22-1+ubuntu16.04.1+deb.sury.org+1)