dashmap
crossbeam
| dashmap | crossbeam | |
|---|---|---|
| 12 | 42 | |
| 2,726 | 6,858 | |
| - | 1.1% | |
| 5.5 | 8.6 | |
| 11 days ago | 1 day ago | |
| Rust | Rust | |
| MIT License | 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.
dashmap
- StupidAlloc: what if memory allocation was bad actually
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dashmap VS scalable-concurrent-containers - a user suggested alternative
2 projects | 13 Apr 2023
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Samsara, a safe Rust concurrent cycle collector
The problem is, every single one of these half-dozen crates has at least one known major issue (including UAF), exactly like C++ implementations (which isn't surprising since it's the kind of things where the ownership isn't clear and then the borrow checker can't help us).
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Rust vs Go
Deadlocks and leaks are easy as other languages.
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Shared mutable state is bad... so how do I create a global cache in a multi-threaded app?
Have you considered https://github.com/xacrimon/dashmap ?
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Announcing Leapfrog, a faster concurrent HashMap
Dashmap made some api changes compared to the stdlibs hashmap, which leads to some oddities, as highlighted here: https://github.com/xacrimon/dashmap/issues/175
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Writing a concurrent LRU cache
Some additional notes are in this slide deck and the implementation javadoc. You'd probably want to use something like DashMap for the hash table.
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HashMap-based cache for async programs
You can look at existing concurrent maps like Dashmap https://github.com/xacrimon/dashmap or Cashmap https://gitlab.redox-os.org/redox-os/chashmap
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How does one avoid lock of locks? or use the technique of latch crabbing of databases
Also dashmap
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Noteworthy concurrent data structures?
The only one I've used is Dashmap, it's a concurrent interior-mutability hashmap. Very convenient crate in the case you need that.
crossbeam
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Hyperbridge: Fast multi-producer, multi-consumer unbounded channel in Rust
Crossbeam isn't async[0]. It can multiplex with itself (via the `select!` macro), but not with anything else.
[0]: https://github.com/crossbeam-rs/crossbeam/issues/896
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Where can I read about how to write a safe API for unsafe code?
Shooting from the hip, crossbeam might be a good candidate for understanding the thread safety aspects of Rust. I kind of feel like this is probably "too big" of a project if you're just learning, but I can't think of something smaller off the top of my head that would be suitable.
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multi-producer multi-consumer channels for message passing python library
I am familiar with crossbeam channels, but now I need to work with python, and I was looking for a similar library.
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I needed to write a simple multi-threaded message processing queue in C++ today. Makes me really appreciate how easy this is to do in Rust.
In the C++ example you create a naive mpsc queue using a std queue and a mutex, while in the rust example you use `std::sync::mpsc` which is now implemented internally using https://github.com/crossbeam-rs/crossbeam .
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crossbeam VS scalable-concurrent-containers - a user suggested alternative
2 projects | 13 Apr 2023
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Ergonomic Communication with a tokio::task::spawn
There are more in the ecosystem like in https://crates.io/crates/crossbeam
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Rust Tips and Tricks #PartOne
The crossbeam crate offers a powerful alternative to standard channels with support for the Select operation, timeouts, and more.
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How would one go about updating in-memory storage lock free, while other threads read?
From this project: https://github.com/crossbeam-rs/crossbeam
- This implementation is actually unsafe since we don't check if the index is in-bounds. But this is fine since this is only used internally.
What are some alternatives?
hashbrown - Rust port of Google's SwissTable hash map
rayon - Rayon: A data parallelism library for Rust
moka - A high performance concurrent caching library for Rust
tokio - A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...
HashMap - An open addressing linear probing hash table, tuned for delete heavy workloads
rust-threadpool - A very simple thread pool for parallel task execution
leapfrog - Lock-free concurrent and single-threaded hash map implementations using Leapfrog probing. Currently the highest performance concurrent HashMap in Rust for certain use cases.
RxRust - The Reactive Extensions for the Rust Programming Language
megahash - A super-fast C++ hash table with Node.js wrapper, tested up to 1 billion keys.
coroutine-rs - Coroutine Library in Rust
stretto - Stretto is a Rust implementation for Dgraph's ristretto (https://github.com/dgraph-io/ristretto). A high performance memory-bound Rust cache.
Bus Writer - Single-reader, multi-writer & single-reader, multi-verifier; broadcasts reads to multiple writeable destinations in parallel