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This mechanism also enables multi-column compression (MCC), enhancing compression by exploiting correlations between columns, a long-time weakness of columnar storage. We contribute a 2-phase algorithm to find encodings expressions during compression.<\/jats:p>\n          <jats:p>FastLanes also innovates in its API, providing flexible support for partial decompression, facilitating engines to execute queries on compressed data. FastLanes is designed for fine-grained access, at the level of small batches rather than rowgroups; in order to limit the decompression memory footprint to fit CPU and GPU caches.<\/jats:p>\n          <jats:p>We contribute an open-source implementation of FastLanes in portable (auto-vectorizing) C++. 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