zstd
µWebSockets
zstd | µWebSockets | |
---|---|---|
109 | 41 | |
22,445 | 16,817 | |
1.5% | 1.1% | |
9.7 | 8.6 | |
8 days ago | about 2 months ago | |
C | C++ | |
GNU General Public License v3.0 or later | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
zstd
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Rethinking string encoding: a 37.5% space efficient encoding than UTF-8 in Fury
> In such cases, the serialized binary are mostly in 200~1000 bytes. Not big enough for zstd to work
You're not referring to the same dictionary that I am. Look at --train in [1].
If you have a training corpus of representative data, you can generate a dictionary that you preshare on both sides which will perform much better for very small binaries (including 200-1k bytes).
If you want maximum flexibility (i.e. you don't know the universe of representative messages ahead of time or you want maximum compression performance), you can gather this corpus transparently as messages are generated & then generate a dictionary & attach it as sideband metadata to a message. You'll probably need to defer the decoding if it references a dictionary not yet received (i.e. send delivers messages out-of-order from generation). There are other techniques you can apply, but the general rule is that your custom encoding scheme is unlikely to outperform zstd + a representative training corpus. If it does, you'd need to actually show this rather than try to argue from first principles.
[1] https://github.com/facebook/zstd/blob/dev/programs/zstd.1.md
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Drink Me: (Ab)Using a LLM to Compress Text
> Doesn't take large amount of GPU resources
This is an understatement, zstd dictionary compression and decompression are blazingly fast: https://github.com/facebook/zstd/blob/dev/README.md#the-case...
My real-world use case for this was JSON files in a particular schema, and the results were fantastic.
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SQLite VFS for ZSTD seekable format
This VFS will read a sqlite file after it has been compressed using [zstd seekable format](https://github.com/facebook/zstd/blob/dev/contrib/seekable_f...). Built to support read-only databases for full-text search. Benchmarks are provided in README.
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Chrome Feature: ZSTD Content-Encoding
Of course, you may get different results with another dataset.
gzip (zlib -6) [ratio=32%] [compr=35Mo/s] [dec=407Mo/s]
zstd (zstd -2) [ratio=32%] [compr=356Mo/s] [dec=1067Mo/s]
NB1: The default for zstd is -3, but the table only had -2. The difference is probably small. The range is 1-22 for zstd and 1-9 for gzip.
NB2: The default program for gzip (at least with Debian) is the executable from zlib. With my workflows, libdeflate-gzip iscompatible and noticably faster.
NB3: This benchmark is 2 years old. The latest releases of zstd are much better, see https://github.com/facebook/zstd/releases
For a high compression, according to this benchmark xz can do slightly better, if you're willing to pay a 10× penalty on decompression.
xz -9 [ratio=23%] [compr=2.6Mo/s] [dec=88Mo/s]
zstd -9 [ratio=23%] [compr=2.6Mo/s] [dec=88Mo/s]
- Zstandard v1.5.6 – Chrome Edition
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Optimizating Rabin-Karp Hashing
Compression, synchronization and backup systems often use rolling hash to implement "content-defined chunking", an effective form of deduplication.
In optimized implementations, Rabin-Karp is likely to be the bottleneck. See for instance https://github.com/facebook/zstd/pull/2483 which replaces a Rabin-Karp variant by a >2x faster Gear-Hashing.
- Show HN: macOS-cross-compiler – Compile binaries for macOS on Linux
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Cyberpunk 2077 dev release
Get the data https://publicdistst.blob.core.windows.net/data/root.tar.zst magnet:?xt=urn:btih:84931cd80409ba6331f2fcfbe64ba64d4381aec5&dn=root.tar.zst How to extract https://github.com/facebook/zstd Linux (debian): `sudo apt install zstd` ``` tar -I 'zstd -d -T0' -xvf root.tar.zst ```
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Honey, I shrunk the NPM package · Jamie Magee
I've done that experiment with zstd before.
https://github.com/facebook/zstd/blob/dev/programs/zstd.1.md...
Not sure about brotli though.
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How in the world should we unpack archive.org zst files on Windows?
If you want this functionality in zstd itself, check this out: https://github.com/facebook/zstd/pull/2349
µWebSockets
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I'm open-sourcing my game engine
They use (uWebSockets)[https://github.com/uNetworking/uWebSockets], which was written in C++, but has an interface to use in NodeJS. It's been really performant for me in my simple tests compared to other popular websocket libs that slow down fairly quickly.
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8 Best WebSocket Libraries For Node
µWebSockets, pronounced as "microWebSocket”, is a WebSocket library written in C++ and has Node.js bindings. Its design focuses on being efficient and scalable, making it ideal for applications that require high concurrency and low latency.
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Recommendations for a CPP HTTP server which supports changing max threads at run time.
You can do that with any single threaded library that leaves threading to you. Like for example https://github.com/uNetworking/uWebSockets
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What's the hot tech stack these days?
Websockets are also pretty valuable for updating the page in real time, there are servers in many languages. I'm a big fan of https://github.com/uNetworking/uWebSockets which is C++ but also has JS bindings to use with Node.js.
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I have done a full benchmark of a POST REST API on my computer: Node.js vs Fastify vs Express.js vs Deno vs Bun vs GO. Node.js is used WITH and WITHOUT clustering on 6-core I7 processor
Can you include uWebsockets? https://github.com/uNetworking/uWebSockets
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[Cpp] Quelle bibliothèque de serveur Web C++ faut-il utiliser de nos jours ?
μWebSockets Génial, rapide, peut transformer l’eau en vin. Nécessite C++17.
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Nuklear – A single-header ANSI C immediate mode cross-platform GUI library
Not exaclty -- it looks like it's pretty overkill for my needs
I'm looking for something more like websocketpp[0], or even just grpc without a requisite proxy. uWebsockets looks really promising, being header only, but in the fine print requires a runtime library. unfortunately, none of that ecosystem seems to use cmake, making integrating it that much more of a pain.
why use cpp for this, I'm sure some HNer will ask. the ray tracer itself is using cuda, that's why. I've also debated
- running it as a grpc server and having some proxy in a more web-accessible language
- creating python bindings and using python to make a websocket/http server for it
neither of those are out of the question, but they're not my first choices, because I'd like to keep the build & execution simple. introducing dependencies, especially other executables, is in conflict with that.
i don't need anything particularly scalable -- a threaded implementation, or one using select() would be fine, if not preferable.
[0] https://docs.websocketpp.org/
[1] https://github.com/uNetworking/uWebSockets
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WebSocket Server in C
Really cool i also made and CAPI for using WebSocket in C, https://github.com/uNetworking/uWebSockets/tree/master/capi
I will take a deep look on your project thanks for sharing!
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Socketify.py - Maybe the fastest web framework for Python and PyPy
We discover a really fast, small, and well maintained C++ Library called uNetworking/uWebSockets, but no C API available, so we create and adapt the full C API from uNetworking/uWebSockets and will integrate libuv powered fetch and file IO, this same C API is used by Bun
- In the 1970s, programming was an elite's task. Today programming is done by uneducated "farmers" and as a result, the care for smart algorithms, memory usage, CPU-time usage and the like has dwindled in comparison.
What are some alternatives?
LZ4 - Extremely Fast Compression algorithm
Boost.Beast - HTTP and WebSocket built on Boost.Asio in C++11
Snappy - A fast compressor/decompressor
libwebsockets - canonical libwebsockets.org networking library
LZMA - (Unofficial) Git mirror of LZMA SDK releases
WebSocket++ - C++ websocket client/server library
7-Zip-zstd - 7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard
drogon - Drogon: A C++14/17 based HTTP web application framework running on Linux/macOS/Unix/Windows [Moved to: https://github.com/drogonframework/drogon]
ZLib - A massively spiffy yet delicately unobtrusive compression library.
Mongoose - Embedded Web Server
brotli - Brotli compression format
rpc-websockets - JSON-RPC 2.0 implementation over WebSockets for Node.js and JavaScript/TypeScript