Historical Results
Based on (4) saved test runs, The test labeled "microtime(true)" was (on average) the faster by 0.0058 seconds, (0.624% faster)
The microtime(true) test took 0.9264 seconds.
The time() test took 0.9322 seconds.
Nitty-Gritty
Each test case ran 20 random code order iterations consisting of 236,964 loops for a total of 4,739,285 runs.
- Line execution difference (0.000001) milliseconds.
- Avg difference (0.000) milliseconds per 236,964 loops.
- Total difference 5.81 milliseconds for 4,739,285 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, "time()", was:
for ($i = 0; $i < 100; $i++) $GLOBALS['dummy'] = time();
The second test, "microtime(true)", was:
for ($i = 0; $i < 100; $i++) $GLOBALS['dummy'] = microtime(true);