Mali T720 VRAM increase when render with high FPS

Hello guys,

I have a simple render app on Android with MALI T720 gpu.

This app will render a 3D map with some mountain and rivers.

When I drag the map the render thread will run with a high FPS like 60 fps.

When there is no any operation, the render thread will only update one time in one second.

I find, when render with high FPS, the VRAM will increase to a high value too, like 60mb.

When I stop drag, the VRAM will down to 30mb almost.

I check the vertex and shader, there is no extra value or function.

My question is whether the T720 gpu have some feature could improve it?

Any help to hit will be greate.

Thank you.

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