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709: Optimise the `ExactWords` sub-criterion within `Exactness` r=loiclec a=loiclec # Pull Request ## Related issue Fixes (partially) https://github.com/meilisearch/meilisearch/issues/3116 ## What does this PR do? 1. Reduces the algorithmic complexity of finding the documents containing N exact words from something that is exponential to something that is polynomial. 2. Cache intermediary results between different calls to the `exactness` criterion. ## Performance Results On the `smol_songs.csv` dataset, a request containing 10 common words now takes about 60ms instead of 5 seconds to execute. For example, this is the case with this (admittedly nonsensical) request: `Rock You Hip Hop Folk World Country Electronic Love The`. Co-authored-by: Loïc Lecrenier <loic.lecrenier@me.com> |
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