SFUG Flash on Mobile and Devices

Editor's Notes

• #2: team
• #3: team
• #30: don’t hide elements or set the alpha to zero but actual remove them from the stage so that they wont be taken into account during the compositing/drawing cycle of the flash player
• #31: keep your displaylist or clips flat avoid deep nested clips to avoid performance penalties -- also only show elements or load data when it’s actually necessary can help
• #32: you can use external assets to increase performance or memory usage
• #33: the more colours the more bits so more memory will be used by the player same for compressed pictures or using transparencies
• #34: the use of vectors take up cpu power because of the math which requires the player do more work then instead of using bitmaps (no calculations for each curve etc.)
• #35: the use of transparant pictures of clips makes it harded for the player to be smart and only redraw parts which are changing. because transparent have to be merged or composited with the clips behind it. especially, use as much opaque or solid bitmaps as possible
• #36: gotoAndPlay() requires the player to render or load all assets on each frame so if you want to jump to frame 5 the frames 1-4 have been loaded and drawn already.
• #37: similar to tip #6 fonts are embedded in the flash movie got converted to vector shapes which takes more time as discussed in tip #6
• #38: if you use images and then scale them down or you might be better off to make the image straight away in the right size to avoid unnecessary transformations by the flash player meaning it has to do less heavy lifting
• #39: the use of tweens requires the elements on the frames to be interpolated in between the keyframes which takes up cpu usage better to use keyframes instead easier for the flash player
• #40: the desktop computer will always be better performing then the actual target device -- don’t forget to test on the device itself. of course, using the performance test swf file from device central and make your own custom device profile can make life easier but it’s not the real deal.
• #43: thank you!