std::chrono based PerfCounter

PerfCounter.h

#pragma once
#include <string>
#include <chrono>

namespace chrono = std::chrono;
using hrclock = chrono::high_resolution_clock;

namespace utils
{
    class PerfCounter
    {
        string mName;
        chrono::steady_clock::time_point mStart;
        bool mShowDuration;
    public:
        PerfCounter(const string& name, bool autoStart = true, bool showDuration = true)
        {
            if (autoStart) {
                mStart = hrclock::now();
            }
        }
        ~PerfCounter()
        {
            if (mShowDuration) {
                log("[{}]: took {} ms\n", mName, ticks());
            }
        }
        int64_t ticks() const
        {
            return ((hrclock::now() - mStart) / 1000000).count();
        }
    };
}