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QuackStore is a caching extension for DuckDB that dramatically improves query performance on remote data sources. By prefixing URLs with 'quackstore://', the extension caches downloaded data locally, reducing query times from ~49 seconds to ~3 seconds on subsequent runs. The extension supports various data formats including CSV, Parquet, and Iceberg catalogs from sources like S3 and GitHub, with minimal storage overhead (116 MB for 26 million rows in the example).

QuackStore: OLAP Cache Layer for DuckDB

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