We have released beta 15, a minor update which features mostly internal improvements. There were a few bugs fixed. It is now available on automatic update.
We did, however, added a new feature called Dynamic Speed Adjustment. This automatic adjustment is available on Mac and Windows, and dynamically adjusts the processing speed of your backup, depending if you are using your computer. For example, if you are using your computer to play a game, Bun's CPU usage will be throttled down to minimum, so that your game can proceed at full speed. When you have stepped away from your computer or have gone to bed at night, Bun will automatically turns up the speed so that your backup can proceed as quickly as possible.