Test: chr v. literal
How much worse is chr() than just a literal (if it's cleanly representable.)
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The test labeled "chr()" was the faster by 0.0242 seconds, (3.594% faster)
The chr() test took 0.6503 seconds.
The literal test took 0.6746 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 172,782 loops for a total of 3,455,640 runs.
- Line execution difference (0.000007) milliseconds.
- Avg difference (1.212) milliseconds per 172,782 loops.
- Total difference 24.25 milliseconds for 3,455,640 loops
The iteration variablity for Code 1 was (1.0116) milliseconds and Code 2 was (2.1026) 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';