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 0.0086 seconds, (0.801% faster)
The chr() test took 1.0645 seconds.
The literal test took 1.0731 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 284,263 loops for a total of 5,685,260 runs.
- Line execution difference (0.000002) milliseconds.
- Avg difference (0.430) milliseconds per 284,263 loops.
- Total difference 8.59 milliseconds for 5,685,260 loops
The iteration variablity for Code 1 was (5.8154) milliseconds and Code 2 was (4.1139) 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';