OBSearch is a distributed similarity search index. It can (for example) match programs and help to detect Open Source/Libre license violations, find music that sounds like Sisters of Mercy, or match huge vectors of randomly generated integers just for fun. License: GNU General Public License v3 Changes: Several optimizations were made, including a 13-fold improvement in freeze for P+Tree. A Kmeans++ pivot selector was implemented. TentaclePivotSelector was improved.

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