leapfrog
hashbrown
leapfrog | hashbrown | |
---|---|---|
3 | 22 | |
186 | 2,265 | |
- | 1.2% | |
4.4 | 8.2 | |
7 months ago | 10 days ago | |
Rust | Rust | |
Apache License 2.0 | Apache License 2.0 |
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leapfrog
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Leapfrog 0.2.0 (improved concurrent rust hashmap)
I'm announcing v 0.2.0 of leapfrog (crate), which adds new features and fixes the collision problems of the previous version. The performance is slightly reduced, but not by much and the maps are still very fast.
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On my way to make the production rusty
You can try Leapfrog as your concurrent hashmap implementation https://github.com/robclu/leapfrog. I recently stumbled across it and was pleased by its performance
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Announcing Leapfrog, a faster concurrent HashMap
For a personal project I needed a concurrent HashMap, so thought I would port one of the fast C++ hashmaps to Rust., which I have called Leapfrog. The API is similar to the HashMap in the std library, but to improve concurrent performance it is slightly different in places.
hashbrown
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OpenD, a D language fork that is open to your contributions
That's because you're looking at a wrapper around the actual implementation (which lives in an external package). Notice "use hashbrown::hash_map as base;" at the top.
There's far more unsafe there: https://github.com/rust-lang/hashbrown/blob/f2e62124cd947b5e...
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I just published my first crate: `identified_vec` - I would love some input! PR's are most welcome.
You might want to check out how popular ecosystem crates do some of these things. Particularly relevant to you are probably crates providing collections, such as smallvec, hashbrown, or indexmap.
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GDlog: A GPU-Accelerated Deductive Engine
https://github.com/topics/swisstable
rust-lang/hashbrown: https://github.com/rust-lang/hashbrown
CuPy has array but not yet hashmaps, or (GPU) SIMD FWICS?
NumPy does SIMD:
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When Zig Outshines Rust – Memory Efficient Enum Arrays
Thanks, great point indeed. I am looking into this https://github.com/rust-lang/hashbrown
The way I think about it -- rather naively, I suppose -- is that I care more about the references cells make to each other than the actual grid of cells displayed on a table. The latter feels more like a "view" of the data than an actual data structure?
This also seems to align with the relative priority of (sorted from highest to lowest): figuring out the order of evaluation, calculating those evaluations, and finally displaying the results of the evaluation
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This Week in Rust # 500!!
updated std's hashbrown dependency to 0.14 which contains some optimizations
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Crust of Rust: std::collections [video]
The std hashmap is actually very fast and uses state of the art hashmap design, namely because it's implemented by hashbrown
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Deduplicating a Slice in Go
I believe Rust uses hashbrown as the underlying implementation now. This just calculates the number of buckets based on the number of items requested:
https://github.com/rust-lang/hashbrown/blob/009969a860290849...
Is it really the case that rehashing can guarantee that the number of buckets allocated will be sufficient for any given set of keys? In principle you could fail to rehash in a way that reduces collisions after k attempted rehashings.
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Blog Post: Rust Is a Scalable Language
For example, since the hashbrown crate is marked with #![no_std], it can be used as a dependency for the standard library.
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Hey Rustaceans! Got a question? Ask here (6/2023)!
To implement something that cannot be expressed in safe Rust, or at least cannot be expressed succinctly in safe Rust, like fundamental datastructures. The hashbrown crate contains a lot of unsafe code, but it's such high quality that it's now the backing implementation for std::collections::HashMap.
- Data-driven performance optimization with Rust and Miri
What are some alternatives?
dashmap - Blazing fast concurrent HashMap for Rust.
actix - Actor framework for Rust.
meow_hash - Official version of the Meow hash, an extremely fast level 1 hash
indicium - A simple in-memory search for collections and key-value stores.
flamegraph - Easy flamegraphs for Rust projects and everything else, without Perl or pipes <3
conc-map-bench - Fork of rust concurrent hash map bencmarks to include leapfrog map.
bumpalo - A fast bump allocation arena for Rust
lib-wc - A simple rust library
moonfire-nvr - Moonfire NVR, a security camera network video recorder
seize - Fast, efficient, and robust memory reclamation for Rust.
aoc - 🎄 My solutions and walkthroughs for Advent of Code and more related stuff.