Aki's team has optimized Tizen HTML5 mobile applications at Samsung. While dealing with multiple vendors and several complex apps, they have seen apps which work perfectly, as well as o with various performance issues. In this session Aki shares common pitfalls, lessons learned, and proven techniques for achieving good application start-up times and run-time performance. Accurately measuring HTML5 application performance in Tizen is explained. Aki will then share concrete techniques for improving the measured performance. Topics include tips on correctly initializing complex application structures, efficiently modularizing and lazy loading JavaScript, as well as correctly utilizing smooth hardware-accelerated animations. Aki will also explain techniques on how to ensure that user-initiated scrolling and animations will work at a steady 60 frames-per-second rate.