Flash to jednak zajebisty był/jest:

I really hope browsers start speeding up SVG rendering. My group ran into this issue when converting Vector training content from flash to HTML5 and we could barely get HTML5 to render 1 frame every two seconds. The vector artwork was quite complex, but Flash handled it with ease for years. The browser chokes on it. We wound up rasterizing the content to make it play smoothly in HTML5.