Zlib-rs: workplan

Supporters & funders

NLnet Foundation

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Support
  • In 2024, 2025: support for sudo-rs, part of our privilege-boundary initiative.
  • In 2024, 2025: support for bzip2-rs, part of our data-compression initiative.
  • In 2025: support for our codegen initiative.
  • In 2023, 2025, 2026: support for ntpd-rs, part of our time-synchronization initiative.
  • In 2021, 2022, 2023: support for statime, part of our time-synchronization initiative.

Chainguard

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Support
  • In 2024: support for zlib-rs, part of our data-compression initiative. Chainguard funded initial development of zlib-rs through Prossimo.
  • In 2025: support for zstd-rs, part of our data-compression initiative.

Astral

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Support
  • In 2025: support for zstd-rs, part of our data-compression initiative.

Sovereign Tech Agency

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Support
  • In 2023, 2024: support for ntpd-rs, part of our time-synchronization initiative.
  • In 2023, 2024: support for statime, part of our time-synchronization initiative.

Past supporters & funders

Devolutions

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Support
  • In 2024: support for zlib-rs, part of our data-compression initiative.

Prossimo

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Tweede golf

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Support
  • In 2024: support for zlib-rs, part of our data-compression initiative. Tweede golf provided in-kind support for the bulk of the development of zlib-rs.
  • In 2024, 2025, 2026: support for sudo-rs, part of our privilege-boundary initiative. Tweede golf provides in-kind support for maintenance.
  • In 2023: support for statime, part of our time-synchronization initiative.

Internet Security Research Group

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Support
  • In 2023, 2024: support for ntpd-rs, part of our time-synchronization initiative.
  • In 2023, 2024: support for sudo-rs, part of our privilege-boundary initiative.
  • In 2024, 2025: support for zlib-rs, part of our data-compression initiative.

Work on zlib-rs continues. Please get in touch with us, if you are interested in financially supporting memory-safe zlib.

In progress milestones

Milestone 3: Rust Interface and Performance Improvements

  • Experiments to improve performance using AVX512 instruction
  • Implementation of a Rust interface for zlib-rs
  • Deliverable: release of zlib-rs, including the Rust interface

Status: In progress.

This work is supported by Sovereign Tech Agency.

Future work

Milestone 4: Audit, packaging and adoption

  • Implementation of remaining API functions: implement remaining functions that must be provided to be a complete drop-in replacement, see this issue
  • Audit: a third party security audit
  • One year of maintenance
  • Packaging & adoption: support adoption and provide packages for distributions

Status: Pending funding. Requested funding €45.000.

Milestone 5: Above par performance

Status: Pending funding. Requested funding €30.000.

Completed milestones

Milestone 1: Release 0.2.x

  • Implementation Implement zlib compression and decompression in pure rust
  • Implementation libz-rs dynamic library that defines an interface identical to libz, and is a drop-in replacement for that library.
  • Benchmarking Benchmarking versus zlib-ng
  • Integrate Integrate with flate2

Completed May 2024

Milestone 2: Release 0.4.0

  • Audit: ISRG audit, fuzzing
  • Benchmarking: Benchmark on CI (partial). Benchmarking on more architectures versus zlib-ng and zlib-chromium
  • Wasm optimizations: SIMD optimizations for Webassembly
  • Implementation: Improvements and fixes

Completed Nov 2024


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