Test: chr v. pack
Note that this test uses concatenation for many chr()'s vs. one pack(). In a case with many calls to pack(), the result might be different (but this is a less common use.)
View test history (2) Run this test again Return to test menuResult: Discarded
The test labeled "chr()" was the faster by 0.0186 seconds, (1.480% faster)
The chr() test took 1.2385 seconds.
The pack() test took 1.2572 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 268,865 loops for a total of 5,377,300 runs.
- Line execution difference (0.000003) milliseconds.
- Avg difference (0.930) milliseconds per 268,865 loops.
- Total difference 18.60 milliseconds for 5,377,300 loops
The iteration variablity for Code 1 was (9.0492) milliseconds and Code 2 was (12.0361) 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) . chr(65) . chr(65) . chr(65);
The second test, "pack()", was:
$GLOBALS['dummy'] = pack('C4', 65, 65, 65, 65);