HTML5 beats Adobe Flash at video playback, falls behind in everything else30
Nine different smartphones and tablets were used for the test, all of them running the latest official version of their respective operating system. Even though HTML5 has been quoted by some as a potential Flash replacement, the end results were mostly in favor of Adobe's platform. Could it be because Adobe itself partially funded the research? Well, this doesn't seem very likely because identical source codes were being used for every type of test.
HTML5 was a clear winner when it came down to playing HD videos in H.264 format. Most devices were dropping a considerable amount of frames when rendering them with Flash, while using HTML5 for playback gave much better results. Just to be sure that all data was correct, Christmann decided to go for overkill and actually counted every frame rendered with a high speed camera.
So, it looks like Adobe Flash is not anywhere near becoming obsolete, but there is still a lot to be desired in terms of video rendering performance. Hopefully, future software updates will be able to do something about it.
source: Craftymind via GigaOM