CPU usage by Analog Devices's Gyro&Accelometer

I am doing some testing on a roboRIO and i have found out that the FRC Gyro&accelomter board that included in the last year kit of parts is making the CPU usage on the roboRIO to jump by 20-30%, we wanted to use the sensor on the robot but it might make our software that already using high % of the CPU to crash …

somebody checked this out also ?