Tech Optimizer
December 22, 2025
Biscuit is an open-source project developed by CrystallineCore, available on GitHub, that introduces a specialized index access method for PostgreSQL to enhance query speed for pattern matching in LIKE queries. It addresses limitations of traditional indexing methods like B-tree and GIN indexes, particularly in complex LIKE or ILIKE operations and multi-column searches. Biscuit uses in-memory bitmap structures to reduce query times by precomputing bitmap representations of string patterns, allowing for rapid filtering without scanning entire rows. The project has a vibrant community contributing to its optimization and performance improvements, especially for ARM architectures. Independent tests show that Biscuit can outperform PostgreSQL's pg_trgm by factors of 5-10x on wildcard-heavy workloads. Real-world applications include significant reductions in query latencies for e-commerce and log processing pipelines, with a reported 40% reduction in ETL job times for error pattern detection in server logs. Biscuit faces challenges such as the initial time required to build indexes on large tables and limited compatibility with older PostgreSQL versions, but the maintainers are actively addressing these issues. The design of Biscuit encourages integration with other open-source tools, and community feedback is shaping its future development.
