Duration Logger (Qt)

durationlogger.h

#ifndef DURATIONLOGGER_H
#define DURATIONLOGGER_H

#include <QTime>

/**
 * A helper class that logs the duration of a specific scope.
 */
class DurationLogger
{
public:
    DurationLogger(const char *thing) : thing(thing) { time.start(); }
    ~DurationLogger() { qDebug() << thing << time.elapsed(); }
private:
    QTime time;
    const char *thing;
};

/**
 * Use this macro in functions to conveniently time their duration.
 */
#define LOG_DURATION DurationLogger _durationLogger(Q_FUNC_INFO)

#endif // DURATIONLOGGER_H