Apple has announced several performance enhancements coming to the iPhone and iPad in iOS 9.

iOS 9's performance boosts focus on efficiency and battery life

Apple is making a number of performance improvements in iOS 9. Enhancements have been designed around efficiency, with faster animations, CPU usage reductions, and battery improvements.

iOS 9's core graphics are now on top of Metal. Using Metal, Apple's built-in apps feature faster scrolling and smoother animations. There has been a 50% reduction in CPU usage with iOS 9, and Apple says they are seeing up to an hour of extra battery life in the iPhone 6 running the system. They've even added a lower power mode that extends battery life up to three additional hours.

Keep your eyes on our WWDC liveblog for the latest news from Apple's developer conference.