rust-analyzer
The most recommended of 7 language servers
Free, widely used Rust language server giving accurate errors and code analysis; people note heavy memory use across multiple workspaces.
Free, widely used Rust language server giving accurate errors and code analysis; people note heavy memory use across multiple workspaces.
40 people gave an opinion
- recommend it
- 19
- criticize it
- 21
- approval share
- 48%
Recommended in 8 of 13 months
- November 2025: recommended
- December 2025: recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: not recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: not recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 19 people recommend itNeeds 10 or more, met.
- 0.9 recommenders for every criticNeeds 2 to 1 or better, not met.
- Recommended in 8 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Accurate Rust analysis, better than other IDEs
“I also highly doubt that any IDE, whatever that is, is better at analyzing Rust code than rust-analyzer is.”
Comment from 18 May 2026 in “No More JetBrains Products for Me” “their amazing rust analyzer in rustrover”
Comment from 23 Dec 2025 in “Claude Code gets native LSP support” Reports errors before compiling
“Let rust-analyzer tell you if there are errors before you even try compiling.”
Comment from 23 Nov 2025 in “Several core problems with Rust” “language servers like rust-analyzer do essentially replace cargo check”
Comment from 27 Aug 2026 on Hacker News Lightweight and snappy
“rust-analyzer is a very lightweight solution”
Comment from 23 Jan 2026 in “Tree-sitter vs. Language Servers” “Rust's LSP server is pretty snappy”
Comment from 3 Mar 2026 in “Against Query Based Compilers” Works well for many setups
“rust-analyser LSP also worked great for me”
Comment from 22 Sep 2026 in “JetBrains Air: A System of Products for Agentic Software Development” “rust-analyzer is a great LSP”
Comment from 9 May 2026 in “Making Julia as Fast as C++”
What people warn about
Each mark is one comment
High memory use per workspace
“It regularly goes over 13gb in my large workspace so I have to configure it to run in a cgroup”
Comment from 22 Aug 2026 in “Rust Glancer: Rust LSP using 100x less RAM” “rust-analyzer taking 2GiB of RAM per instance definitely hurts.”
Comment from 22 Aug 2026 in “Rust Glancer: Rust LSP using 100x less RAM” “frequently running out of RAM due to all the Rust analyzer, Dart analysis server, and Ty LSP servers”
Comment from 27 May 2026 in “Claude Code as a Daily Driver: Claude.md, Skills, Subagents, Plugins, and MCPs” - Comment from 22 Aug 2026 in “Rust Glancer: Rust LSP using 100x less RAM”
- Comment from 22 Aug 2026 in “Rust Glancer: Rust LSP using 100x less RAM”
Slow indexing and frequent restarts
“Waiting for RA to build up the full in memory data structure for a large workspace is so painful.”
Comment from 22 Aug 2026 in “Rust Glancer: Rust LSP using 100x less RAM” “I've found that I need to completely restart rust-analyzer far more often than I'd like”
Comment from 24 Nov 2025 in “The Rust Performance Book (2020)” “I would really appreciate if rust analyzer was faster, actually.”
Comment from 3 Mar 2026 in “Against Query Based Compilers” Runs build scripts and proc macros automatically
“rust-analyzer will automatically run the build.rs before you have a chance to audit the code”
Comment from 20 Aug 2026 in “Malicious Rust Crate Arrayref Runs a Build-Time Payload” “Rust Analyzer executes proc macros as soon as you open the project”
Comment from 21 Aug 2026 in “Malicious Rust Crate Arrayref Runs a Build-Time Payload” Trouble with some setups and code
“I've seen enough issues with rust-analyzer in the wild with coworkers having trouble getting it working well for their setups”
Comment from 22 Aug 2026 in “Rust Glancer: Rust LSP using 100x less RAM” “rust analyzer fails 13 lines into my main.rs file because I use something rust analyzer just doesn't work with that well”
Comment from 23 Dec 2025 in “Claude Code gets native LSP support”
Other language servers people recommend
The four most recommended other language servers, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| rust-analyzerThis page | 19 | 21 | 48% | 8 | — | — |
| clangd | 15 | 6 | 71% | 10 | — | Approved |
| Rust Glancer | 10 | 0 | 100% | 2 | — | — |
| gopls | 9 | 4 | 69% | 6 | — | — |
| markdown-oxide | 6 | 0 | 100% | 3 | — | — |
What people said
40 of the 44 comments that mention it, newest first. Each links to the original comment.
“which is very useful for extension traits”
“rust-analyser LSP also worked great for me”
“Same with rust-analyzer for rust projects.”
“language servers like rust-analyzer do essentially replace cargo check”
“I've seen enough issues with rust-analyzer in the wild with coworkers having trouble getting it working well for their setups”
“it just sucks for us, the users, because RA is the only thing we have”
“RA current method of handling in Proc-Macros are very fragile”
“When you get multiple projects open each with their own rust analyzer though, it starts to bite”
“I've seen my machine stutter out as it eats up the memory”
“It becomes an obstacle on a 64GB machine given I work with multiple workspaces open”
“It regularly goes over 13gb in my large workspace so I have to configure it to run in a cgroup”
“RA acts like they expect to be the only thing running on your pc.”
“rust-analyzer takes such a huge amount of memory.”
“In that context, I believe that avoiding disk was the _right_ decision:”
“rust-analyzer taking 2GiB of RAM per instance definitely hurts.”
“the design decision to flat out refuse using disk cache”
“But RA already eats up huge amount if storage when working in a large project”
“Waiting for RA to build up the full in memory data structure for a large workspace is so painful.”
“Rust Analyzer executes proc macros as soon as you open the project”
“rust-analyzer will automatically run the build.rs before you have a chance to audit the code”
“it's rust analyzer that's causing the majority of your problems”
“it has to run the compiler when you save a file”
“Rust Analyzer / cargo check is inefficient and throws a lot of data away each time instead of caching it”
“I got much performance problems and cache inconsistencies with Rust lsp server”
“frequently running out of RAM due to all the Rust analyzer, Dart analysis server, and Ty LSP servers”
“I also highly doubt that any IDE, whatever that is, is better at analyzing Rust code than rust-analyzer is.”
“rust-analyzer is a great LSP”
“I think LSPs like rust-analyzer are very good tools to learn the language itself.”
“the rust LSP causes the Zed text editor to lag badly when there's a lot of warnings.”
“Sometimes, they're packages that I'm extremely grateful to have updates for immediately (like rust-analyzer)”
“Rust's LSP server is pretty snappy”
“I would really appreciate if rust analyzer was faster, actually.”
“Rust-Analyzer taking up so much of my system's resources”
“rust-analyzer is a very lightweight solution”
“It's not really a bad thing.”
“rust analyzer fails 13 lines into my main.rs file because I use something rust analyzer just doesn't work with that well”
“their amazing rust analyzer in rustrover”
“It's not perfect because you only get syntax highlighting, but it works.”
“I've found that I need to completely restart rust-analyzer far more often than I'd like”
“Let rust-analyzer tell you if there are errors before you even try compiling.”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.