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/FEXTRAflag parsing)
- C-ABI Drop-In Compatibility: Implements standard
zlib.hsymbols (deflateInit,deflate,deflateEnd,inflateInit,inflate,inflateEnd,adler32,crc32). Legacy C applications can linklibz_zerowith 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.
1 maintainer
Metadata
1 maintainer
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)
| File | Size | Uploaded | |
|---|---|---|---|
| zlib_zero-1.0.11.tar.gz | 33.5 kB | Details |
Built distributions (wheels)
Total release size: 18.6 MB
Release files / zlib_zero-1.0.11.tar.gz
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