8fc7e56cdc
Optimize large array creation in const-eval This changes repeated memcpy's to a memset for the case that we're propagating a single byte into a region of memory. It also optimizes the element-by-element copies to have a tighter loop; I'm pretty sure the old code was actually doing a multiply within each loop iteration. For an 8GB array (`static SLICE: [u8; SIZE] = [0u8; 1 << 33];`) this takes us from ~23 seconds to ~6 seconds locally, which is spent roughly 50/50 in (a) memset to zero and (b) memcpy of the original place into a new place, when popping stack frame. The latter seems hard to avoid but is a big memcpy (since we're copying the type rather than initializing a region, so it's pretty fast), and the first is as good as it's going to get without special casing constant-valued arrays. Closes https://github.com/rust-lang/rust/issues/55795. (That issue's references to lint checking don't appear true anymore, but I think this closes that case as something that is slow due to *time* pretty fully. An 8GB array taking only 6 seconds feels reasonable enough to not merit further tracking). |
||
|---|---|---|
| .cargo | ||
| .github | ||
| .vscode | ||
| assets | ||
| bench_data | ||
| crates | ||
| docs | ||
| editors/code | ||
| lib | ||
| xtask | ||
| .editorconfig | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| Cargo.lock | ||
| Cargo.toml | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| PRIVACY.md | ||
| README.md | ||
| rust-bors.toml | ||
| rustfmt.toml | ||
| triagebot.toml | ||
rust-analyzer is a modular compiler frontend for the Rust language. It is a part of a larger rls-2.0 effort to create excellent IDE support for Rust.
Quick Start
https://rust-analyzer.github.io/manual.html#installation
Documentation
If you want to contribute to rust-analyzer or are just curious about how things work under the hood, check the ./docs/dev folder.
If you want to use rust-analyzer's language server with your editor of choice, check the manual folder. It also contains some tips & tricks to help you be more productive when using rust-analyzer.
Security and Privacy
See the corresponding sections of the manual.
Communication
For usage and troubleshooting requests, please use "IDEs and Editors" category of the Rust forum:
https://users.rust-lang.org/c/ide/14
For questions about development and implementation, join rust-analyzer working group on Zulip:
https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer
Quick Links
- Website: https://rust-analyzer.github.io/
- Metrics: https://rust-analyzer.github.io/metrics/
- API docs: https://rust-lang.github.io/rust-analyzer/ide/
- Changelog: https://rust-analyzer.github.io/thisweek
License
rust-analyzer is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).
See LICENSE-APACHE and LICENSE-MIT for details.