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?

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Result: Discarded

The test labeled "sprintf()" was the faster by 0.0208 seconds, (2.991% faster)

sprintf() 100%
pack() 97.009%

The sprintf() test took 0.6754 seconds.
The pack() test took 0.6962 seconds.

Nitty-Gritty

Each test case ran 20 random code order iterations consisting of 148,510 loops for a total of 2,970,200 runs.

  • Line execution difference (0.000007) milliseconds.
  • Avg difference (1.041) milliseconds per 148,510 loops.
  • Total difference 20.82 milliseconds for 2,970,200 loops

The iteration variablity for Code 1 was (2.9484) milliseconds and Code 2 was (2.5423) milliseconds. The lower and the closer together there values are the more accurate the results are.

Code

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 (7.2.15-1+ubuntu16.04.1+deb.sury.org+1)