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frame rate difference for ipad2 and ipad3 device
I create a scene with one monument building for ipad application and install this app on ipad3 and ipad2.The problem is frame rate difference.On ipad3,frame rate is 12-10 but on ipad2 frame is 25-29.I will try to find a problem through profiler.Kindly let me know what is a issue of fame rate difference.
Answer by screenname_taken · Nov 18, 2014 at 10:32 AM
Well, they have almost the same hardware specs, but the resolution on the ipad3 is 4 times that of ipad 2. So it's to be expected that the same (or very very similar) CPU/GPU combo is to have more trouble rendering at higher res.
Answer by HarshadK · Nov 18, 2014 at 11:22 AM
If you look at the hardware specification for both these:
iPad2:
System Chip: Apple A5
GPU: PowerVR SGX543MP2 (This is dual core)
RAM: 512 MB
Resolution: 1024 x 768 pixels
iPad3:
System Chip: Apple A5X (A high performance variant of Apple A5)
GPU: Quad core PowerVR SGX543MP4
RAM: 1024 MB
Resolution: 2048 x 1536 pixels
So theoretically it has doubled the processing power from iPad2 to iPad3 with it's GPU.
But again since the resolution has also doubled, for a fragment shader the number of pixels to process has also quadrupled. But even then the capacity to process vertices and other information has also improved which also needs to be taken into consideration.
So we can say iPad3 has improved performance which will surely elevate the frame rate but it is just a theoretical speculation based on the information above.
This is just a glimpse and has a lot of things to cover in order to provide even a speculation.
Practically, the things might not be as they are as per the speculation so it is much better if you test them out with different scenarios if you have these devices (I don't :( )
It more than doubled actually. It's like going from a 512*512 texture to the next one that is 1024*1024. That's four time the pixels.
@screenname_taken $$anonymous$$y mistake. Will edit the answer to reflect it. Have a look. :-)
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