library/Rediska/Profiler/Profile.php
public function start()
    {
        $this->_startTime = microtime(true);

        $this->_profiler->startCallback($this);

        return $this->_startTime;
    }
public function start()
    {
        $this->_startTime = microtime(true);

        $this->_profiler->startCallback($this);

        return $this->_startTime;
    }
Start profile

@return integer