aHash
rust
aHash | rust | |
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11 | 7 | |
936 | 711 | |
- | 0.8% | |
7.2 | 0.0 | |
5 days ago | 2 days ago | |
Rust | Rust | |
Apache License 2.0 | GNU General Public License v3.0 or later |
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aHash
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I wrote kubernetes admission controller in Rust. And it's blazingly fast!
If you find yourself in a situation where you've got some kind of HashMap in your JSON data, try using ahash as the hasher... either via the ready-made ahash::AHashMap or via something like type AHashMap = std::collections::HashMap; if you're using something like serde_with which doesn't like the ready-made one.
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New ScyllaDB Go Driver: Faster Than GoCQL and Its Rust Counterpart
aHash claims it is faster than t1ha[1].
The t1ha crate also hasn't been updated in over three years so the benchmark in this link should be current.
[1] https://github.com/tkaitchuck/aHash/blob/master/compare/read...
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The quick and practical “MSI” hash table
When I recently went shopping for fast hashes for short strings, I settled on wyhash, but ahash[0] seemed like it would have been better if I had bothered to port it from Rust.
> In that time you can FNV-1a a "short" string.
Not if you read it one byte at a time like in TFA!
It looks like the best FNV for short strings in smhasher[1] is comparably fast to ahash[2] on short strings, but I proposed doing slightly less work than ahash.
> From the top of my head, t1ha, falkhash, meowhash and metrohash are using AES-NI and none of them are particularly fast on short inputs, and at least two of them have severe issues, despite guarding against lots of vulnerabilities, which your construction does not.
For issues like reading past the ends of buffers and discarding the extra values, it would be nice if programmers could arrange to have buffers that could be used this way. I posted a thing for hashing strings of a fixed length though, to compare with the thing for hashing strings of a fixed length in TFA.
[0]: https://github.com/tkaitchuck/aHash/blob/master/src/aes_hash...
[1]: https://github.com/rurban/smhasher/blob/master/doc/FNV1a_YT....
[2]: https://github.com/rurban/smhasher/blob/master/doc/ahash64.t...
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Lox interpreter in Rust slower than in Java
Regarding the hashing function: I'll already tried using aHash which sped thing things up but not by a lot.
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Any "surprises" in Rust to be aware of?
aHash has a very good comparison doc: https://github.com/tkaitchuck/aHash/blob/master/compare/readme.md (Personally, I use it more to compare non-aHash hashes than to aHash; aHash has no reason to be biased between other hashes, though it does have reason to be biased for itself. I trust their analysis to not be biased, but it's always better to be more sure.)
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resolver 2 target dependencies
Hi, i was under the impression that with resolver = "2" cargo would be able to respect the target for the dependencies. Currently i have the problem that while using sqlx, surf and gloo in projects that are in the same workspace – thus sharing a single Cargo.lock – i get a cyclic dependency with aHash that is roughly discussed here
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New Bare Hash Map: 2X-3X Speedup over SOTA
Apparently there is a patch for the SMHasher here which adds support for ahash:
https://github.com/tkaitchuck/aHash/tree/master/smhasher
There are also ahash's own benchmarks here:
https://github.com/tkaitchuck/aHash/blob/master/compare/test...
They use the wyhash Rust crate, so if wyhash itself was updated doing a head to head comparison would boil down to updating the wyhash crate and rerunning ahash's benchmark suite.
- Comparison of ahash with other hashing algorithms
- Comparing ahash to other hashing algorithms
rust
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ESP32 example project
The esp-template issue might be this one: https://github.com/esp-rs/rust/issues/158. Try with --release or updating to 1.68.0 with espup update. I'll take a look at the log as soon as I can, atm Im on the phone and is not that easy to scroll through :(
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Are there any Rust forks out there?
Sure. Espressif maintains a fork which adds support for their microcontrollers.
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Would it be possible to compile openssl-sys for esp32
I am trying to make a vaccine passport validation for my country using the ESP32 for my micro controller. I have gotten the std rust library to compile using (esp-rs)[https://github.com/esp-rs/rust], but the actual validation library that I use needs openssl which refuses to compile.
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Are there situations where it's better to use C++?
Xtensa. They've got a fork of LLVM that supports it that they're working toward getting upstreamed. The community has a fork of rustc that uses it (and a quickstart crate) while we wait for it to get upstreamed.
- Rust-Xtensa: Rust for Xtensa Processors. Built in Targets for the ESP32/ESP8266
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Multi-use kernel written in Rust
It only works if you have an Xtensa compiler which takes hours to compile, here: Rust Xtensa (if you don't have it). The network driver is just a function that sets the name of the driver so the Esp32 does something other that blinking.
- Could IOTA transaction be started solely from the IoT capable device (like esp32)?
What are some alternatives?
wyhash - The FASTEST QUALITY hash function, random number generators (PRNG) and hash map.
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
smhasher - Automatically exported from code.google.com/p/smhasher
Elixir - Elixir is a dynamic, functional language for building scalable and maintainable applications
wyhash-rs - wyhash fast portable non-cryptographic hashing algorithm and random number generator in Rust
Nim - Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, and elegance (in that order of priority).
meow_hash - Official version of the Meow hash, an extremely fast level 1 hash
scala - Scala 2 compiler and standard library. Bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3
smhasher - Hash function quality and speed tests
odbc-api - ODBC (Open Database Connectivity) bindings for Rust.
rust - Empowering everyone to build reliable and efficient software.
tonic - A native gRPC client & server implementation with async/await support.