public function push()
    {
        $start = $this->_start[$this->_idx++] = array(
            memory_get_usage(),
            memory_get_peak_usage(),
            memory_get_usage(true),
            memory_get_peak_usage(true)
        );
        return $start;
    }
public function push()
    {
        $start = $this->_start[$this->_idx++] = array(
            memory_get_usage(),
            memory_get_peak_usage(),
            memory_get_usage(true),
            memory_get_peak_usage(true)
        );
        return $start;
    }
public function push ( ) { $ start = $ this -> _start [ $ this -> _idx ++ ] = array ( memory_get_usage ( ) , memory_get_peak_usage ( ) , memory_get_usage ( true ) , memory_get_peak_usage ( true ) ) ; return $ start ; }
Push a new tracker on the stack.
Push a new tracker on the stack .