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3. When the proposed compression is allowed to have the same bit budget to represent each coordinate, the pairwise Euclidean distance is not distorted? Most of compression algorithms (not PCA-type algorithms) suffer from the same problem. === Updates after the feedback === I've read other reviewers' comments and authors' feedback. I think that my original concerns are resolved by the feedback. Moreover, they suggest a possible direction to combine QuadSketch with OPQ, which is appealing.