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zlib-zero

zlib-zero is a modern C++20, high-performance, memory-optimized, multi-threaded drop-in replacement for standard zlib and zlib-ng.

Designed for high-throughput cloud microservices, data pipelines, and embedded applications, zlib-zero achieves multi-core parallel speedups via adaptive chunking while reducing dynamic decode memory footprint by ~98.5% (from 524 KB down to 8 KB per block) to fit entirely within L1 data cache.


Key Features & Architecture

  • Adaptive Parallel Compression: Automatically divides streams $\ge 128\text{ KB}$ into 64 KB chunks compressed concurrently across available CPU cores, while producing output fully compliant with standard DEFLATE decoders.
  • L1-Cacheable 2-Tier Decode Table (DynTable): Replaces flat lookup arrays with a 1,024-entry 10-bit fast-path table (~4 KB) and an overflow vector, reducing RAM usage per stream by ~98.5%.
  • Full RFC Compliance:
    • RFC 1950 (zlib framing & Adler-32 trailer)
    • RFC 1951 (DEFLATE payload & LZ77 back-referencing)
    • RFC 1952 (GZIP framing, CRC32, ISIZE trailer, FNAME / FEXTRA flag parsing)
  • C-ABI Drop-In Compatibility: Implements standard zlib.h symbols (deflateInit, deflate, deflateEnd, inflateInit, inflate, inflateEnd, adler32, crc32). Legacy C applications can link libz_zero with zero code changes.
  • SIMD Accelerated Checksums:
    • Adler-32: 4-way SIMD vectorization & division-free modulo arithmetic ($>3.7\text{ GB/s}$).
    • CRC32: Hardware ARM64 crc32x & x86_64 SSE4.2 / Slice-by-8 fallback ($>10\text{ GB/s}$).
  • C++20 Memory Safety: Strong type safety, RAII lifetime management, bounds-checked bitwriters, and absolute LZ77 position indexing (pos) to prevent stream loops and circular wrap bugs.

Comparison Matrix

Dimension Standard zlib (madler) zlib-ng zlib-zero
Language Standard C89 / C99 C99 Modern C++20
Multi-Core Parallelism Single-threaded Single-threaded Built-in (ParallelDeflateCompressor)
Decode RAM per Stream ~524 KB ~524 KB 8 KB (L1 Cache Optimized)
GZIP (RFC 1952) Support Built-in Built-in Native (compress_gzip / decompress_gzip)
Header-Only Mode No No Yes (modernized_zlib_deflate.hpp)
C ABI Drop-In Native Native Full Drop-in (libz_zero)

Installation & Usage

Option 1: Python (pip install)

Install directly via pip from PyPI:

pip install zlib-zero

Or install directly from GitHub:

pip install git+https://github.com/Suprath/zlib-zero.git

Usage in Python:

import zlib_zero

# Fast C++20 compression
compressed = zlib_zero.compress_zlib(b"Data to compress " * 1000)

Option 2: CMake Integration (FetchContent)

Add directly into your project's CMakeLists.txt:

include(FetchContent)
FetchContent_Declare(
    zlib_zero
    GIT_REPOSITORY https://github.com/Suprath/zlib-zero.git
    GIT_TAG        main
)
FetchContent_MakeAvailable(zlib_zero)

target_link_libraries(your_target PRIVATE zlib_zero_static)

Option 3: Header-Only Integration (C++20)

Include the header directly in C++ compilation units:

#include "modernized_zlib_deflate.hpp"

// Single-call zlib compression
auto compressed = ModernizedZlib::compress_zlib(data.data(), data.size());

// Single-call gzip compression
auto gz_compressed = ModernizedZlib::compress_gzip(data.data(), data.size(), "output.txt");

Option 4: Build Shared & Static Libraries from Source

git clone https://github.com/Suprath/zlib-zero.git
cd zlib-zero
mkdir build && cd build
cmake ..
make

Build outputs:

  • libzlib_zero.a (Static Library)
  • libz_zero.dylib / libz_zero.so / zlib_zero.dll (Shared Drop-In Library)

Running Tests

Verify correctness and standards compliance using the test suite:

python3 -m unittest discover -s tests -p "test_*.py"

License

This project is licensed under the MIT License.

Metadata

Release files for zlib-zero 1.0.11

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for zlib-zero 1.0.11
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zlib_zero-1.0.11.tar.gz 33.5 kB Details

Built distributions (wheels)

Table of built distributions (wheels) for zlib-zero 1.0.11
File
zlib_zero-1.0.11-cp313-cp313-win_amd64.whl CPython 3.13 CPython 3.13 Windows x86-64 Details
zlib_zero-1.0.11-cp313-cp313-musllinux_1_2_x86_64.whl CPython 3.13 CPython 3.13 Linux musl 1.2+ x86-64 Details
zlib_zero-1.0.11-cp313-cp313-musllinux_1_2_i686.whl CPython 3.13 CPython 3.13 Linux musl 1.2+ x86-32 Details
zlib_zero-1.0.11-cp313-cp313-manylinux_2_17_x86_64.manylinux2014_x86_64.whl CPython 3.13 CPython 3.13 Linux glibc 2.17+ x86-64 Details
zlib_zero-1.0.11-cp313-cp313-macosx_11_0_arm64.whl CPython 3.13 CPython 3.13 macOS 11.0+ ARM64 Details
zlib_zero-1.0.11-cp313-cp313-macosx_10_13_x86_64.whl CPython 3.13 CPython 3.13 macOS 10.13+ x86-64 Details
zlib_zero-1.0.11-cp312-cp312-win_amd64.whl CPython 3.12 CPython 3.12 Windows x86-64 Details
zlib_zero-1.0.11-cp312-cp312-musllinux_1_2_x86_64.whl CPython 3.12 CPython 3.12 Linux musl 1.2+ x86-64 Details
zlib_zero-1.0.11-cp312-cp312-musllinux_1_2_i686.whl CPython 3.12 CPython 3.12 Linux musl 1.2+ x86-32 Details
zlib_zero-1.0.11-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl CPython 3.12 CPython 3.12 Linux glibc 2.17+ x86-64 Details
zlib_zero-1.0.11-cp312-cp312-macosx_11_0_arm64.whl CPython 3.12 CPython 3.12 macOS 11.0+ ARM64 Details
zlib_zero-1.0.11-cp312-cp312-macosx_10_13_x86_64.whl CPython 3.12 CPython 3.12 macOS 10.13+ x86-64 Details
zlib_zero-1.0.11-cp311-cp311-win_amd64.whl CPython 3.11 CPython 3.11 Windows x86-64 Details
zlib_zero-1.0.11-cp311-cp311-musllinux_1_2_x86_64.whl CPython 3.11 CPython 3.11 Linux musl 1.2+ x86-64 Details
zlib_zero-1.0.11-cp311-cp311-musllinux_1_2_i686.whl CPython 3.11 CPython 3.11 Linux musl 1.2+ x86-32 Details
zlib_zero-1.0.11-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl CPython 3.11 CPython 3.11 Linux glibc 2.17+ x86-64 Details
zlib_zero-1.0.11-cp311-cp311-macosx_11_0_arm64.whl CPython 3.11 CPython 3.11 macOS 11.0+ ARM64 Details
zlib_zero-1.0.11-cp311-cp311-macosx_10_9_x86_64.whl CPython 3.11 CPython 3.11 macOS 10.9+ x86-64 Details
zlib_zero-1.0.11-cp310-cp310-win_amd64.whl CPython 3.10 CPython 3.10 Windows x86-64 Details
zlib_zero-1.0.11-cp310-cp310-musllinux_1_2_x86_64.whl CPython 3.10 CPython 3.10 Linux musl 1.2+ x86-64 Details
zlib_zero-1.0.11-cp310-cp310-musllinux_1_2_i686.whl CPython 3.10 CPython 3.10 Linux musl 1.2+ x86-32 Details
zlib_zero-1.0.11-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl CPython 3.10 CPython 3.10 Linux glibc 2.17+ x86-64 Details
zlib_zero-1.0.11-cp310-cp310-macosx_11_0_arm64.whl CPython 3.10 CPython 3.10 macOS 11.0+ ARM64 Details
zlib_zero-1.0.11-cp310-cp310-macosx_10_9_x86_64.whl CPython 3.10 CPython 3.10 macOS 10.9+ x86-64 Details
zlib_zero-1.0.11-cp39-cp39-win_amd64.whl CPython 3.9 CPython 3.9 Windows x86-64 Details
zlib_zero-1.0.11-cp39-cp39-musllinux_1_2_x86_64.whl CPython 3.9 CPython 3.9 Linux musl 1.2+ x86-64 Details
zlib_zero-1.0.11-cp39-cp39-musllinux_1_2_i686.whl CPython 3.9 CPython 3.9 Linux musl 1.2+ x86-32 Details
zlib_zero-1.0.11-cp39-cp39-manylinux_2_17_x86_64.manylinux2014_x86_64.whl CPython 3.9 CPython 3.9 Linux glibc 2.17+ x86-64 Details
zlib_zero-1.0.11-cp39-cp39-macosx_11_0_arm64.whl CPython 3.9 CPython 3.9 macOS 11.0+ ARM64 Details
zlib_zero-1.0.11-cp39-cp39-macosx_10_9_x86_64.whl CPython 3.9 CPython 3.9 macOS 10.9+ x86-64 Details

Total release size: 18.6 MB

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