Release Notes¶

See GitHub Releases for downloads and more information.

1.0.0.Beta2 (2026-04-29)¶

Highlights of this release:

Interactive hardwood dive TUI for exploring Parquet files
Parquet Variant logical type, including shredded reassembly
Additional logical types: INTERVAL, MAP/LIST, INT96 timestamps
Faster reads via a parallel per-column pipeline and per-column in-page row skipping
Reduced S3 traffic via byte-range caching, coalesced GETs, and small-column fetches
Unified reader API based on builders
CLI with reorganized inspect subcommands

See the 1.0.0.Beta2 milestone on GitHub for the full list of resolved issues.

Highlights of this release:

S3 and remote object store support with coalesced reads
CLI tool for inspecting and querying Parquet files
Avro GenericRecord support via the hardwood-avro module
Row group filtering with predicate push-down and page-level column index filtering
InputFile abstraction for pluggable file sources
S3 support and filtering in the parquet-java compatibility layer
Project documentation site

See the 1.0.0.Beta1 milestone on GitHub for the full list of resolved issues.

Highlights of this release:

Zero-dependency Parquet file reader for Java
Row-oriented and columnar read APIs
Support for flat and nested schemas (lists, maps, structs)
All standard encodings (RLE, DELTA_BINARY_PACKED, DELTA_BYTE_ARRAY, BYTE_STREAM_SPLIT, etc.)
Compression: Snappy, ZSTD, LZ4, GZIP, Brotli
Projection push-down, parallel page pre-fetching, and memory-mapped file I/O
Multi-file reader and parquet-java compatibility layer
Optional Vector API acceleration on Java 22+
JFR events for observability
BOM for dependency management

Thank you to all contributors to this release: Andres Almiray, Gunnar Morling, Rion Williams.