Now this is some serious speed.
http://www.darpa.mil/NewsEvents/Releases/2014/10/28.aspx
The ten-stage common-source amplifier operates at a speed of one terahertz (1012 Hz), or one trillion cycles per second150 billion cycles faster than the existing world record of 850 gigahertz set in 2012.
http://www.darpa.mil/NewsEvents/Releases/2014/10/28.aspx