Apache Feather/Arrow IPC format reference — fast columnar DataFrame I/O.
CommandDescriptionintroFeather overview, V1 vs V2, key propertiespythonpyarrow.feather read/write, benchmarksr-langR arrow package, Python↔R interopschemaArrow types, nested types, metadatavs-parquetSpeed vs compression tradeoffspandaspd.read_feather, caching patternscompressionLZ4/ZSTD options, when to use eachbest-practicesPipeline patterns, file size guidelines