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InfluxDB
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SaaSHub
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I feel obliged to point this out here:
Do not build zlib with the optimized assembly code.
The "hand-optimized" assembly code is a contribution and does not receive support by the library authors. There are bugs in there and it will read/write out of bounds given just the right data - we've been bit by it. Note [0].
The Makefiles get this right - they stay far away from any hand-rolled assembly. But the contributed Visual Studio solutions default to building with the ASM: [1] [2]. *Make sure to choose Debug/ReleaseWithoutAsm.
You can check any zlib build for whether it was built with ASM via (zlibCompileFlags() & (1 << 9)): [3]
Needless to say, an OOB in a library as fundamental (and as user-data-facing) as zlib is a serious vulnerability. We didn't find any distribution or major software that uses a vulnerable zlib build, but if you are on Windows you might accidentally make one. Beware!
[0]: https://github.com/madler/zlib/blob/master/inffast.c#L12
[1]: https://github.com/madler/zlib/blob/cacf7f1d4e3d44d871b605da...
[2]: https://github.com/madler/zlib/blob/cacf7f1d4e3d44d871b605da...
[3]: https://github.com/madler/zlib/blob/cacf7f1d4e3d44d871b605da...
Going away from Zlib proper but staying with its format, there’s libdeflate[1], an implementation that’s substantially faster on modern machines but can’t stream, and of course Zopfli[2], a glacially slow compressor that’s somewhat better (and occasionally much more so).
[1] https://github.com/ebiggers/libdeflate
[2] https://github.com/google/zopfli