The only practical difference between the anonymous classes and the top-level classes is that the anonymous classes will hold an implicit reference to the outer class. This won’t manifest itself in performance, but will impact you if you ever serialise these classes.
The Stopwatch class is specifically designed to measure elapsed time and may (if available on your hardware) provide good granularity/accuracy using an underlying high-frequency hardware timer. So this seem the best choice. The IsHighResolution property can be used to determine whether high resolution timing is available. Per the documentation, this class offers a wrapper on … Read more
To time code execution, you should use the StopWatch class. Also, you have to account for the JIT, the runtime etc, so let the test run a sufficient amount of times (like 10,000, 100,000 times) and get some sort of average. It is important to run the code multiple times, not the program. So write … Read more
If you have cygwin installed, from it’s bash shell, run your executable, say MyProgram, using the time utility, like so: /usr/bin/time ./MyProgram This will report how long the execution of your program took — the output would look something like the following: real 0m0.792s user 0m0.046s sys 0m0.218s You could also manually modify your C … Read more
If you are timing an entire function, then you can use defer to eliminate some of the repetitive code. // timer returns a function that prints the name argument and // the elapsed time between the call to timer and the call to // the returned function. The returned function is intended to // be … Read more
Yes, under the as-if rule the compiler is only obligated to emulate the observable behavior of the code, so if you have a loop that does not have any observable behavior then it can be optimized away completely and therefore will effectively have zero execution time. Examples For example the following code: int main() { … Read more