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Re:Using k-d trees to efficiently calculate nearest neighbor... by agibsonccc on Sunday February 11, 2018 @03:08AM (#16351729)
Check out LargeVis then. The original github repo by the authors has a sparse mode: https://github.com/lferry007/LargeVis/

TSNE didn't scale well no matter what you did to it (hence the newer technique) - in general though you can't beat cosine similarity of TFIDF vectors as a baseline.

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