duo-cache

duo-cache is a caching library built on LevelDB, designed to speed up Duo builds by storing data on disk. Version 2.1.2 is the latest stable release; the project appears inactive with no recent commits (last updated around 2015). It integrates with Duo's build pipeline to cache processed files, plugin results, and dependency scans. Unlike simple in-memory caches, it persists data across runs using LevelDB. However, it depends on the now-deprecated `level` npm package and is not actively maintained, making it unsuitable for new projects. Key differentiators: uses LevelDB for disk-backed persistence, supports both file-level and plugin-level caching with flexible key structures.