A WIP fork of zlib.managed with target framework, API changes (hence fork) and performance improvements.
The goal is to introduce as near-native performance as possible while implementing missing features from Zlib into the codebase.
Targets netstandard1.3
DeflateStream in the .NET framework is a wrapper around the Intel fork of Zlib. This fork sacrifices compression of sparse data for performance gains which results in huge differences between the output size of certain images on Windows compared to other platforms. By producing a high performance managed implementation we can guarantee excellent cross platform image compression.
The following benchmark was designed to highlight the difference in compression of sparse data.
| Method | Compression | Mean | Error | StdDev | Median | Ratio | RatioSD | Bytes | Gen 0 | Gen 1 | Gen 2 | Allocated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SharpZipLibDeflate | 1 | 1,021,612,566.1765 ns | 20,200,814.4331 ns | 48,399,861.1732 ns | 1,037,427,350.0000 ns | 1.00 | 0.00 | 16315059 | 3000.0000 | 1000.0000 | - | 49035656 B |
| SixLaborsDeflate | 1 | 131,608,033.3333 ns | 1,033,111.2241 ns | 966,372.8800 ns | 131,561,325.0000 ns | 0.13 | 0.01 | 825050 | - | - | - | 2097928 B |
| DotNetDeflate | 1 | 53,836,300.0000 ns | 311,248.4785 ns | 259,906.5760 ns | 53,878,788.8889 ns | 0.05 | 0.00 | 825050 | - | - | - | 2090486 B |
| ZLibManaged | 1 | 1,213,970,405.0000 ns | 22,988,640.1437 ns | 26,473,752.1755 ns | 1,213,816,750.0000 ns | 1.22 | 0.09 | 16314795 | - | - | - | 83079576 B |
| SharpZipLibDeflate | 6 | 454,864,940.0000 ns | 8,395,919.5257 ns | 7,853,548.3335 ns | 455,084,600.0000 ns | 1.00 | 0.00 | 553805 | - | - | - | 2864872 B |
| SixLaborsDeflate | 6 | 287,681,200.0000 ns | 997,969.1038 ns | 884,673.6165 ns | 287,792,350.0000 ns | 0.63 | 0.01 | 659280 | - | - | - | 2098608 B |
| DotNetDeflate | 6 | 124,441,155.7692 ns | 436,466.0863 ns | 364,468.9497 ns | 124,335,950.0000 ns | 0.27 | 0.00 | 742721 | - | - | - | 2090756 B |
| ZLibManaged | 6 | 491,527,754.5455 ns | 8,499,167.4191 ns | 10,437,740.8637 ns | 487,268,900.0000 ns | 1.09 | 0.04 | 553817 | - | - | - | 51372664 B |
| SharpZipLibDeflate | 9 | 2,706,881,235.7143 ns | 39,566,104.7482 ns | 35,074,321.2825 ns | 2,692,407,600.0000 ns | 1.000 | 0.00 | 553805 | - | - | - | 2864872 B |
| SixLaborsDeflate | 9 | 269,531,600.0000 ns | 2,136,103.6604 ns | 1,783,743.3011 ns | 268,900,600.0000 ns | 0.100 | 0.00 | 659280 | - | - | - | 2097928 B |
| DotNetDeflate | 9 | 0.4450 ns | 0.0042 ns | 0.0039 ns | 0.4428 ns | 0.000 | 0.00 | -1 | - | - | - | - |
| ZLibManaged | 9 | 3,015,820,337.7551 ns | 92,630,177.8609 ns | 270,206,576.6429 ns | 2,897,383,800.0000 ns | 1.046 | 0.03 | 553817 | - | - | - | 51372664 B |