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.)
Run this test again Return to test menuResult: Discarded
The test labeled "chr()" was the faster by 0.024 seconds, (3.092% faster)
The chr() test took 0.7517 seconds.
The pack() test took 0.7757 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 201,503 loops for a total of 4,030,060 runs.
- Line execution difference (0.000006) milliseconds.
- Avg difference (1.199) milliseconds per 201,503 loops.
- Total difference 23.99 milliseconds for 4,030,060 loops
The iteration variablity for Code 1 was (3.7975) milliseconds and Code 2 was (5.1584) 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);