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diff --git a/README.md b/README.md index 9c5f9201307c..5c300fdc49aa 100644 --- a/README.md +++ b/README.md @@ -31,10 +31,10 @@ a list of known ports and bindings is provided on [Zstandard homepage](http://ww ## Benchmarks For reference, several fast compression algorithms were tested and compared -on a server running Arch Linux (`Linux version 5.0.5-arch1-1`), +on a server running Arch Linux (`Linux version 5.5.11-arch1-1`), with a Core i9-9900K CPU @ 5.0GHz, using [lzbench], an open-source in-memory benchmark by @inikep -compiled with [gcc] 8.2.1, +compiled with [gcc] 9.3.0, on the [Silesia compression corpus]. [lzbench]: https://github.com/inikep/lzbench @@ -43,18 +43,26 @@ on the [Silesia compression corpus]. | Compressor name | Ratio | Compression| Decompress.| | --------------- | ------| -----------| ---------- | -| **zstd 1.4.0 -1** | 2.884 | 530 MB/s | 1360 MB/s | -| zlib 1.2.11 -1 | 2.743 | 110 MB/s | 440 MB/s | -| brotli 1.0.7 -0 | 2.701 | 430 MB/s | 470 MB/s | -| quicklz 1.5.0 -1 | 2.238 | 600 MB/s | 800 MB/s | -| lzo1x 2.09 -1 | 2.106 | 680 MB/s | 950 MB/s | -| lz4 1.8.3 | 2.101 | 800 MB/s | 4220 MB/s | -| snappy 1.1.4 | 2.073 | 580 MB/s | 2020 MB/s | -| lzf 3.6 -1 | 2.077 | 440 MB/s | 930 MB/s | +| **zstd 1.4.5 -1** | 2.884 | 500 MB/s | 1660 MB/s | +| zlib 1.2.11 -1 | 2.743 | 90 MB/s | 400 MB/s | +| brotli 1.0.7 -0 | 2.703 | 400 MB/s | 450 MB/s | +| **zstd 1.4.5 --fast=1** | 2.434 | 570 MB/s | 2200 MB/s | +| **zstd 1.4.5 --fast=3** | 2.312 | 640 MB/s | 2300 MB/s | +| quicklz 1.5.0 -1 | 2.238 | 560 MB/s | 710 MB/s | +| **zstd 1.4.5 --fast=5** | 2.178 | 700 MB/s | 2420 MB/s | +| lzo1x 2.10 -1 | 2.106 | 690 MB/s | 820 MB/s | +| lz4 1.9.2 | 2.101 | 740 MB/s | 4530 MB/s | +| **zstd 1.4.5 --fast=7** | 2.096 | 750 MB/s | 2480 MB/s | +| lzf 3.6 -1 | 2.077 | 410 MB/s | 860 MB/s | +| snappy 1.1.8 | 2.073 | 560 MB/s | 1790 MB/s | [zlib]: http://www.zlib.net/ [LZ4]: http://www.lz4.org/ +The negative compression levels, specified with `--fast=#`, +offer faster compression and decompression speed in exchange for some loss in +compression ratio compared to level 1, as seen in the table above. + Zstd can also offer stronger compression ratios at the cost of compression speed. Speed vs Compression trade-off is configurable by small increments. Decompression speed is preserved and remains roughly the same at all settings, @@ -143,6 +151,18 @@ example about how Meson is used to build this project. Note that default build type is **release**. +### VCPKG +You can build and install zstd [vcpkg](https://github.com/Microsoft/vcpkg/) dependency manager: + + git clone https://github.com/Microsoft/vcpkg.git + cd vcpkg + ./bootstrap-vcpkg.sh + ./vcpkg integrate install + ./vcpkg install zstd + +The zstd port in vcpkg is kept up to date by Microsoft team members and community contributors. +If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository. + ### Visual Studio (Windows) Going into `build` directory, you will find additional possibilities: |