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Recently was released Android Studio 3.0.
There are changes regarding Profiling (CPU, Network, Memory).
And with these changes came questions like:
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On your device, go to Settings and tap Developer Options. In the Monitoring section, select Profile GPU Rendering or Profile HWUI rendering, depending on the version of Android running on the device. In the Profile GPU Rendering dialog, choose On screen as bars to overlay the graphs on the screen of your device.
There's no reason to use them unless you're a developer testing an app. Debug GPU overdraw: This uses color-coding to visualize how many times the same pixel has been drawn in the same frame. The visualization shows where an app might be doing more rendering than necessary.
The Profile GPU Rendering tool indicates the relative time that each stage of the rendering pipeline takes to render the previous frame. This knowledge can help you identify bottlenecks in the pipeline, so that you can know what to optimize to improve your app's rendering performance.
GPUs are known to consume more power than CPUs, so expect to see a 10-15% reduction in battery life if you leave it on at all times. What is this? Forcing GPU rendering definitely makes sense on devices with a weaker CPU. If your device is anything less than a quad-core, I would recommend you leave it on at all times.
GPU profiling was removed from Android Studio.
This tool was removed in Android Studio 3.0.
It seems the GPU monitor would interfere in the Memory monitor readings when running, so that could be one of the reasons for why it was removed. Personally I had it disabled most of the time because of this.
And yes, so far the only way I'm aware of debugging it, is on-device.
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