Test: substr($var, 5, 1) vs. isset && {5}
Return the nth character of a string, substring vs string array checking.
View test history (1) Run this test again Return to test menuResult: Discarded
The test labeled "isset {5}" was the faster by 0.008 seconds, (0.684% faster)
The isset {5} test took 1.1663 seconds.
The substr() test took 1.1743 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 291,372 loops for a total of 5,827,440 runs.
- Line execution difference (0.000001) milliseconds.
- Avg difference (0.402) milliseconds per 291,372 loops.
- Total difference 8.03 milliseconds for 5,827,440 loops
The iteration variablity for Code 1 was (6.7064) milliseconds and Code 2 was (8.0916) milliseconds. The lower and the closer together there values are the more accurate the results are.
Code
The first test, "substr()", was:
for ($j = 0; $j < 100; $j++) $GLOBALS['dummy2'] = substr($GLOBALS['dummy'], 5, 1);
The second test, "isset {5}", was:
for ($j = 0; $j < 100; $j++) $GLOBALS['dummy2'] = isset($GLOBALS['dummy']{5}) ? $GLOBALS['dummy']{5} : '';