Historical ResultsBased on (1) saved test runs, The test labeled "$str" was (on average) the faster by 0.0074 seconds, (1.329% faster)
The $str test took 0.5457 seconds.
The substr() test took 0.553 seconds.
Each test case ran 20 random code order iterations consisting of 131,844 loops for a total of 2,636,880 runs.
- Line execution difference (0.000003) milliseconds.
- Avg difference (0.000) milliseconds per 131,844 loops.
- Total difference 7.35 milliseconds for 2,636,880 loops
The iteration variablity for Code 1 was (0.0000) milliseconds and Code 2 was (0.0000) milliseconds. The lower and the closer together there values are the more accurate the results are.
The first test, "substr()", was:
for ($j = 0; $j < 1000; $j++) $GLOBALS['dummy2'] = substr($GLOBALS['dummy'], -1);
The second test, "$str", was:
for ($j = 0; $j < 1000; $j++) $GLOBALS['dummy2'] = $GLOBALS['dummy'][strlen($GLOBALS['dummy'])-1];