Details
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New Feature
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Resolution: Unresolved
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Major - P3
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Query Optimization
Description
This ticket tracks the work contained in Pull Request #1291.
We added these expressions:
'$cossim', '$chi2', '$euclidean', '$squared_euclidean', '$manhattan'
Which allow us to compare long vectors (image features) stored as arrays or BSON.
It is useful to find the most similar images in a dataset. The usage is the following:
db.test_speed.aggregate([{'$project':{'id': '$id',"other_id": '$other_id','distance': {'$cossim': [vector, '$vector']},},},{"$sort": {"distance": -1}},{"$limit": 20}])In addition implementations using avx2 and avx512 are included in this pull request.
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