tinyvec
flume
tinyvec | flume | |
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4 | 14 | |
604 | 2,200 | |
- | - | |
4.4 | 3.9 | |
2 months ago | 13 days ago | |
Rust | Rust | |
Apache License 2.0 | Apache License 2.0 |
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tinyvec
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The Better Alternative to Lifetime GATs
funny indeed. i changed all my projects to use tinyvec
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"pure safe crates"
I've seen the cost of zeroing memory be measurable, or maybe significant enough to care about, but I've never seen 90% of cycles spent on it, the only case I know of that gets close is creating an empty TinyVec versus an empty SmallVec with an inline buffer of 256 bytes. In my opinion that's an unreasonably large inline buffer. At inline buffers of 128 bytes and below, the overhead is less than 50%, and that's on a microbenchmark of the Default impl; the effect is rapidly diluted in a real program.
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single-producer single-consumer concurrent queue
My point is that "implementation that doesn't use unsafe" is not necessarily always slower than "implementation that does use unsafe". Often people assume that this is the case, and it isn't. tinyvec currently beats smallvec in more than a few benchmarks. Not all, but some. And this sometimes visible to users. The point is that if you want speed, you don't necessarily need to give up any safety at all. Most differences in performance are due to the amount of effort or expertise that has been spent on the codebase, not the amount of unsafe in it.
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Now that the long-awaited const generics (MVP) have come to stable in 1.51, what crates are going to gain the most from it?
https://github.com/Lokathor/tinyvec will definitely benefit, although not as much as something currently relying on typenum.
flume
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Hyperbridge: Fast multi-producer, multi-consumer unbounded channel in Rust
The repository seems abandoned; or maybe complete?
At work we use flume, which is another capable multi-producer, multi-consumer async-capable channel [1]. It's great for shuffling data between threads, as well as between async tasks, and between threads and async tasks. Basically any time you want to pieces of code to exchange data or signals without pesky shared state.
1: https://github.com/zesterer/flume
- pub/sub Event bus in rust
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Is there any part of the Standard Library that really impresses you?
I also like flume, it has impressive performance (although not the best). More importantly, it's written only with safe rust. https://github.com/zesterer/flume
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appreciating fearless concurrency
The most commonly suggested replacement for mspc is crossbeam-channel; flume is also relatively popular.
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Rust has a small standard library (and that's ok)
It's not officially deprecated, but the alternatives on crates.io are considered better. flume and crossbeam-channel feature less unsafe code and offer better performance. Benchmarks.
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Why are so many important features not in standard library yet?
it's slow (checkout flume's benchmarks for example)
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Request-response communication between threads?
I would have done the same. I think, and I might be wrong, but the only other alternative, besides anything unsafe, would be to pass mutex back, but I am not sure this would be faster. Btw, I have not done testing, but you might want to look at Flume for your mpsc channels: https://github.com/zesterer/flume Flume, seems to be very fast mpsc implementation. I am planning to evaluate it for logging system.
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A mini-Erlang/Elixir -- tell me if/why my idea sucks
For concurrency/parallelism, you launch at most 2 * CPU Cores, PIN them and use a fast broker to spread the task (like a ring buffer or an MPSC). But you keep linear scan, tight loops, SIMD friendly data, on each. You are not switching context that much, and instead, bet you will process the batch fast. (CPUs are fast today!)
- Whats your favourite open source Rust project that needs more recognition?
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Suggestions on a fast spmc architecture.
https://crates.io/crates/flume and https://crates.io/crates/crossbeam-channel provide MPMC channels.
What are some alternatives?
heapless - Heapless, `static` friendly data structures
uniffi-rs - a multi-language bindings generator for rust
trantor - a non-blocking I/O tcp network lib based on c++14/17
rust - Empowering everyone to build reliable and efficient software.
storages-api
Cargo - The Rust package manager
utils - Utility crates used in RustCrypto
async-wormhole
totally-safe-transmute
bevy - A refreshingly simple data-driven game engine built in Rust
tyrade - A pure functional language for type-level programming in Rust
trust-dns - A Rust based DNS client, server, and resolver [Moved to: https://github.com/hickory-dns/hickory-dns]