Hashing, Searching and Sketching

We are doing a lot of work at Talis at the moment on refining the indexing and searching capabilities in our platform. To that end I’ve trying to get up to speed on subject; anyway I came across this fascinating tech talk over at google on using Hashing and Sketching to get improved search results. Its a little over an hour long, and does get very technical in parts but nonetheless it gives a really insight into the possible gains that can be achieved through locality sensitive hashing functions and sketching ( the compression of large complex objects into a few bytes and then comparing these representations to determine how similar objects are).

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