The debate over Adobe Flash vs. HTML5 is starting to heat up, as both are to made available for more smartphones in the coming months. However, Michael Chaize is a firm believer in Flash, so he did some benchmark comparisons (see video below) with a Google Nexus One using TheManInBlue
site, which clearly shows Flash animations playing smoother than HTML5 animations on the Nexus One. Lastly, he used an iPhone, which currently only supports HTML5 (not Flash), but the HTML5 animations that were rendered by the iPhone were slower than the Nexus One, most likely due to the differences in processor speed. However, Chaize points out that we are in the very early days of Flash and HTML5 being used on smartphone, and that the benchmarks are hard to setup because of the differences between the two technologies. Google Nexus One Review
Comparison of performance of Flash Player 10.1 and HTML 5 on Mobile Devices from michael chaize on Vimeo.