https://arxiv.org/abs/1806.09823 https://arxiv.org/abs/1806.09823 - you can use this to find nearest neighbors to reduce the number of elements you are consider

https://arxiv.org/abs/1806.09823 https://arxiv.org/abs/1806.09823 - you can use this to find nearest neighbors to reduce the number of elements you are considering (or maybe not). Then you need: https://en.wikipedia.org/wiki/Dimensionality_reduction https://en.wikipedia.org/wiki/Dimensionality_reduction