What is the use for GPU rendering option? Sorry my english
Your English is fine. But still, I'm not sure what that is specifically. I know it would use the video chip to render the screen, but that's all I can contribute.
The GPU is the Graphics Processing Unit. Its very much like the CPU, but instead of crunching numbers and taking care of tasks for the operating system and hardware, the GPU renders graphical information and puts it on the screen for you.
Since you don't know what that is, you don't need it.
It uses the gpu instead of the cpu to draw the ui. I am pretty sure it will use more battery if you enable it. I remember enabling it on older phones which had a slow cpu which caused the ui to be laggy, and I'd rather have less battery life than a laggy ui. However I haven't seen a phone in several years that needed that option to not have a laggy ui.
Mark got it right. You can offload the gui of the system on the gpu which eats more battery power.
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