smartstring
rustc_codegen_gcc
smartstring | rustc_codegen_gcc | |
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7 | 33 | |
483 | 9 | |
- | - | |
0.0 | 9.6 | |
8 months ago | 6 days ago | |
Rust | Rust | |
Mozilla Public License 2.0 | Apache License 2.0 |
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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.
smartstring
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Does using "String" instead of "&str" a lot results in unoptimised code?
Your use case sounds like it will involve a lot of small strings that use a subset of UTF-8. If you’re concerned about performance, you could look into something like smartstring. Sixbit also looks interesting, but it looks like it won’t give you any more characters and it’d probably require additional computation to do the conversion (and they’d have to be converted back out).
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Rust Is Hard, Or: The Misery of Mainstream Programming
> If you have a long-running async function, then pass parameters by value! If you have a polymorphic async function, then return your result in a Box.
I've taken to making heavy use of the smallvec and smartstring crates for this. Most lists and strings are small in practice. Using smallvec / smartstring lets you keep most clone() calls allocation-free. This in turn lets you use owned objects, which are easier to reason about - for you and the borrow checker. And you keep a lot of the performance of just passing around references.
I tried to use async rust a couple of years ago, and fell on my face in the process. Most of my rust at the moment is designed to compile to wasm - and then I'm leaning on nodejs for networking and IO. Writing async networked code is oh so much easier to reason about in javascript. When GAT, TAIT and some other language features to fix async land I'll muster up the courage to make another attempt. But rust's progress at fixing these problems feels painfully slow.
https://crates.io/crates/smallvec / https://crates.io/crates/smartstring
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GitHub - epage/string-benchmarks-rs: Comparison of Rust string types
Just to point out, smartstring no longer assumes String memory layout. From the changelog:
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Why is str not just [char]?
There's some really good crates that implement SSO floating around - eg, SmartString. But I agree - its a pity they're needed. Swift built this into the core string type in the language. I think that was the right call.
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Announcing `compact_str`! A super memory efficient immutable string that is transparently stored on the stack, when possible
Comparatively: * SmolStr can inline up to 22 bytes but does not adjust down for 32-bit architectures, meaning it's potentially wasting memory on 32-bit archs. Similarly though it's immutable and Clone is O(1) * SmartString can inline up to 23 bytes, but it's mutable and Clone is O(n). Also this crate makes assumptions about the memory layout of a String, which in theory should be fine, but is a slight caveat.
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Version 0.19.15 released.
SmartString is used to store identifiers (which tends to be short, fewer than 23 characters, and ASCII-based) because they can usually be stored inline. Map keys now also use SmartString.
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Speed of Rust vs. C
I’ve been using smartstrings, which is both excellent and maintained. https://github.com/bodil/smartstring
rustc_codegen_gcc
- Rust Support in the Linux Kernel
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GCC Rust Monthly Report #9 August 2021
It's true that if this project succeeds, that would be an outcome, but it's probably worth noting that you'd really only have to add support for the GCC backend to do that, and not reimplement the frontend as well (parsing, type checking, lifetime checking, etc.). There's an unrelated project working to do that: https://github.com/antoyo/rustc_codegen_gcc that would likely yield those same benefits for less effort.
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Gentoo be like :
platform support (may improve soon)
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Recursive fib is faster in C++?
Here's the gcc backend for rustc here https://github.com/antoyo/rustc_codegen_gcc Since this just swaps the optimizer/codegen module and reuses all the other stuff from rustc it needs less work and can already compile many valid rust programs.
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Anyone used the gcc backend before?
I'd like to use the rustc_codegen_gcc backend to compile some Rust programs, but I'm confused about how to install and use the patched libgccjit dependency. I've downloaded the fork provided but don't know where to go from there.
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The Tor Project announces Arti, a Tor implementation written in Rust from scratch
I was being a little sloppy and mixing together "actual embedded hardware" with "extensions for applications written in other languages" in my head. I think your point about LLVM is still accurate, though I hear peeps about different projects working on GCC support from time to time.
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Rust GCC back end was officially accepted into the compiler
This doesn't have anything to do with using GCC to compile rust, but instead using rustc to compile Rust using the GCC backend. You can do that today by using the linked project, rustc_codegen_gcc, which is intended to be integrated into rustc at some point in the (hopefully near) future.
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This is the patch series to add support for Rust as a second language to the Linux kernel.
Rather than mrustc you should probably look at rustc_codegen_gcc which uses gcc as a backend to rustc (WIP) or GCC Rust which tries to implement a rust frontend for gcc (also WIP). I think rustc_codegen_gcc looks the most promising at the moment
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Hacker News top posts: Jul 6, 2021
Libgccjit AOT Codegen for Rustc\ (2 comments)
- Libgccjit AOT Codegen for Rustc
What are some alternatives?
smol_str
gccrs - GCC Front-End for Rust
compact_str - A memory efficient string type that can store up to 24* bytes on the stack
polonius - Defines the Rust borrow checker.
min-sized-rust - 🦀 How to minimize Rust binary size 📦
avr-hal - embedded-hal abstractions for AVR microcontrollers
libskry_r - Lucky imaging library
bitter - Extract bits from a byte slice
ttapi - Golang Turntable.fm api
redgrep - ♥ Janusz Brzozowski
Rust-for-Linux - Adding support for the Rust language to the Linux kernel.