Orange Pi One how fast is it ?

Orange Pi one is world cheaper $9.99 USD quad core ARM computer at 1.2 Ghz each core and can be overclocked to 1.6Ghz.Here is video in comparison with Raspberry pi 2. It's an open-source single-board computer. It can run Android 4.4 Ubuntu, Debian,It uses the AllWinner H3 SoC , and has 512MB DDR3 SDRAM.
One great source of software is here armbian.com