1. Minimize Latency: Latency is the amount of time it takes for an action to be recognized by the system. Minimizing latency is essential for providing a smooth and immersive experience in VR and AR applications. Examples include using low-latency rendering techniques such as asynchronous timewarp, and using motion-to-photon latency reduction techniques such as reprojection and foveated rendering.

2. Reduce Polygon Count: Polygons are the basic building blocks of 3D models. Reducing the number of polygons used in a scene will help to improve performance and reduce the amount of data that needs to be processed. This can be done by optimizing models, using level of detail (LOD) techniques, and using mesh simplification algorithms.

3. Optimize Shaders: Shaders are small programs that run on the GPU and are used to render 3D objects. Improving the efficiency of shaders can help to reduce the amount of processing power needed to render a scene. Examples include using optimized lighting models, optimizing texture mapping, and using deferred shading techniques.

4. Optimize Memory Usage: Memory is a limited resource on mobile devices, and optimizing memory usage can help to improve performance. This can be done by caching textures and meshes, using texture compression techniques, and using memory management techniques such as garbage collection.

5. Use Multi-Threading: Multi-threading is the process of splitting a task into multiple threads, which can be run in parallel on multiple cores. This can help to improve performance by allowing multiple tasks to be processed simultaneously. Examples include using multi-threaded rendering techniques, and using task-based programming models.

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