Performance counters library

Simple performance counters for C++11.

Usage

You could use the PERFMON_SCOPE for a scope inside of a function:

{
    PERFMON_SCOPE("scope_name");
    ... // scope body
}

or the PERFMON_STATEMENT for a statement:

PERFMON_STATEMENT("counter_name") {
    ... // statement
}

WARNING! Most probably you would not like to use the PERFMON macros in recursive scopes. You could, if you understand what you want; but values of tick counter would be a bit crazy for a human being.

You could get current statistics in the following way:

for (const auto& counter : PERFMON_COUNTERS()) {
    std::cout << counter.Name() << ' '
              << counter.Calls() << ' '
              << counter.Seconds() << std::endl;
}

NOTICE! Values of PERFMON_COUNTERS() can be imprecise because of non-atomicity of the integer arithmetic. If you need to get a better precision, you can call PERFMON_COUNTERS() multiple times and use the median.