Re-selecting void function in C ++

Question

I am trying to use the void function

for (size_t round = 0; round < 5; round++) {
    cpu_time_start = get_cpu_time();
    wall_time_start = get_wall_time();

    scan.assign_clusters(epsilon, mu);

    cpu_time_end = get_cpu_time();
    wall_time_end = get_wall_time();
    ...
}

The first time gives 300 seconds, and the next four timings - 0.000002 seconds. This means that the void function call is assign_clustersoptimized. How can I make my program execute this reusable function call every time and still use optimization for the rest of the code?

I usually do to save the result of this function and then print it, but since it is a function void, do I have the same option?

I use the following optimization flags: -std=c++0x -march=native -O2

Answer 1

It depends on what it takes to fix the error.

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