RenderMode options AIR 2.6

Hi,
first of all, thank you for releasing one AIR version for all platforms, it makes things alot easier.
But then again, I recognize that some things changed fundamentally, and it's hard to get an understanding of what's actually going on.
My problem: rendering performance. It had been an issue on the iPad with the former PFI, whereas I was absolutely satisfied with performance under Android (my test machine is a Galaxy Tab). Rendering on the iPad improved with 2.6, BUT, when I set renderMode to true, some parts of my application hang on the iPad as well as under Android (desktop is ok). It still works with renderMode = auto, but with this option other parts of the app don't render as fast as they should.
I try to set renderMode to auto and set cacheAsBitmap to true for some of my display objects, but the resulting changes in performance are not as expected.
Another strange thing is that with renderMode = gpu, some details just disappear, for example a white box with a thin gray border will be shown with no border etc.
Can you provide some background information or best practice on how to make use of the new capabilities?
Best regards
LLD

So I spent the last days testing and optimizing, and looking into the different forum posts it seems I am not the only one who had to learn coping with the loop of waiting for the adt -package -target ipa-test to finish, install the ipa via USB, just to see that the last step was one in the wrong direction. My current version number tells me that I iterated through this loop for some 60 times. 5 minutes per compile makes around five hours just waiting for compilation...
From what I found out these days, the following seems to be good design practice when making use of AIR 2.6 and renderMode = gpu while targeting multiple platforms, including iOS:
1. Avoid cABM (cacheAsBitmap). It seems to largely increase the memory usage.
2. I had a dynamic mask that only worked with cABM, and it made the screen flicker (!!!) on Galaxy Tab. Having seen this, I first thought of using renderMode = cpu as a general rule, since I am not able to test my app on any hardware device that is out on the market...
3. Dynamic text should not be added to the stage as a TextField, but as a Bitmap, with a TextField being drawn to the Bitmap's bitmapData. TextFields, even with selectable and mouseEnabled set to false, drastically decrease performance (frame rate). Also note that scaling of TextFields does not work properly on iOS (at least on my iPad), see my other post. The workaround of drawing text to Bitmaps helps.
My app is not a game but a business app with lots of graphical elements, which are also added to scrollable lists and which can be dragged around the screen, so it might be comparable to game development. Strictly following the above rules had good effect on performance, and it seems to run stable on all platforms. BTW, I develop in FB4.
I hope others will share their experience here on the forum, it's just too much a waste of time everybody working on the same issues in parallel.
Best regards
LLD

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Solved!
Go to Solution.

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