PHP Benchmarks

Performance comparison of PHP code alternatives.

Test: pack v. sprintf

The documentation describes sprintf() using %c as similar to chr(). It's an arguably cleaner syntax (if only using chars) than pack() uses - is it faster?

View test history (2) Run this test again Return to test menu

Result: Discarded

The test labeled "pack()" was the faster by 0.0552 seconds, (8.295% faster)

pack() 100%
sprintf() 91.705%

The pack() test took 0.6104 seconds.
The sprintf() test took 0.6656 seconds.


Each test case ran 20 random code order iterations consisting of 127,235 loops for a total of 2,544,700 runs.

  • Line execution difference (0.000022) milliseconds.
  • Avg difference (2.761) milliseconds per 127,235 loops.
  • Total difference 55.21 milliseconds for 2,544,700 loops

The iteration variablity for Code 1 was (6.3399) milliseconds and Code 2 was (8.2655) milliseconds. The lower and the closer together there values are the more accurate the results are.


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

$GLOBALS['dummy'] = pack('C4', 65, 65, 65, 65);

The second test, "sprintf()", was:

$GLOBALS['dummy'] = sprintf('%c%c%c%c', 65, 65, 65, 65);

Running: Linux (x86_64:1 GB) PHP (