Test: (int) vs. settype
If you already have a variable, logic tells us that changing is type might be faster than creating a new value (which a cast does.) But, is this true?
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Based on (2) saved test runs, The test labeled "(int)" was (on average) the faster by 0.0032 seconds, (0.391% faster)
The (int) test took 0.82 seconds.
The settype() test took 0.8232 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 212,309 loops for a total of 4,246,180 runs.
- Line execution difference (0.000001) milliseconds.
- Avg difference (0.000) milliseconds per 212,309 loops.
- Total difference 3.22 milliseconds for 4,246,180 loops
The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "(int)", was:
for ($j = 0; $j < 100; $j++) { $i = '42 '; $i = (int) $i; }
The second test, "settype()", was:
for ($j = 0; $j < 100; $j++) { $i = '42 '; settype($i, 'int'); }