openidea

OpenIDEA: The IDE you know, rebuilt in Rust (4.2k stars) What it does All text below is quoted directly from the project README. >The IDE you know, rebuilt in Rust. IntelliJ IDEA-style keymap, tool windows and search-everywhere in a fast native app: editor, code insight, debugger, Git, terminal, database and HTTP clients for 60+ languages Benchmark: Opening freqtrade (Python, ~770 files) with warm caches, median of 5 runs: |OpenIDEA|IntelliJ IDEA 2026.2.3| |:-|:-| |Window with the project|0.9 s|3.1 s| |Ready (CPU settled)|1.1 s|13.2 s| |Memory (USS, all processes)|169 MB|2011 MB| |CPU time until ready|2.4 s|47.9 s| |Idle CPU|4 % of a core|7 % of a core| |Quit|0.3 s|5.9 s| >Editor, code insight, debugger, Git, terminal, database and HTTP clients, for 60+ languages. Builds for macOS, Windows and Linux. Repository l0ng-ai/openidea Repository stats |Metric|Value| |:-|:-| |Stars|4,247| |Forks|346| |Last release|v0.1.33 (2026-11-01)| |Languages|TypeScript 59.9%, Rust 36.4%, CSS 2.6%| |Contributors|34| |AI contributor accounts (Claude / Codex / Cursor / Copilot)|@claude (6 commits), @cursoragent (1 commit)| |AI co-authored commits|Claude: 6, Cursor: 1| Main contributor |Field|Value| |:-|:-| |GitHub|@l0ng-ai| |Commits to this repo|388 (top contributor)| |Followers|108| ────────────────────────────── 📌 If you want to browse more repos like this, we've organized them by category and rankings here: bestgithubrepositories.com 🗂️ We're also archiving repos where possible, so useful projects don't disappear when they're removed from GitHub.

#fsharp Has anyone looked at l0ng-ai/openidea ? I have downloaded this and so far it's been working fine with #fsharp and #flutter

嗯？？？ idea 也没逃过重写吗 不过这技术栈多少有点拧巴……tauri 加上一点 jvm 😨😨😨 jdtls 还是太权威了，能想象出开发者为了 java language server 捏着鼻子使用 jdtls 的场景了 l0ng-ai/openidea

Intellij IDEA, porém reconstruido em Rust: 0.9s para abrir um projeto e somente 169MB de RAM, além de outras features. l0ng-ai/openidea

Correction: Rust is more than just Tauri glue code (openidea#568). But considering that in an IDE the two performance critical parts are code processing (LSP) and frontend, I wonder how much benefit can you really get by making everything except of them in Rust. Overall I actually agree that VSCode has proven that making responsive web based frontends is absolutely viable for the IDE, if you accept startup latency, size and memory use of CEF / Electron. And on Windows and macOS, system WebView may be sufficiently compatible (not on Linux anytime soon!), and they significantly amortize all of those downsides.

This ticket tries to explain it: openidea#568 Building consistent frontends for all platforms isn’t easy in rust, so they use web standards for that.

OpenIDEA: The IDE you know, rebuilt in Rust l0ng-ai/openidea (news.ycombinator.com)

why do we even need the rebuilt? idea is already opensource[0]. In the benchmark[1] the cpu, memory and quit time (!) are compared, but does it makes any sense without feature parity? [0]: jetbrains/intellij-community [1]: l0ng-ai/openidea

OpenIDEA: The IDE you know, rebuilt in Rust | Discussion

Interesting project. It seems it uses CodeMirror [1] in the Tauri frontend (60% of total code is typescript), but uses rust in the backend (30%). Surprising to see that Tauri is apparently good enough for the three platforms it needs to support (or it uses a lot of hacks, I don't know). The advertised memory reduction is remarkable as I expected a full web view to be a bit memory heavy. Not sure how this IDE keeps up with large documents or a lot of opened views though. ___ 1. The editor implementation is here: <github.com/l0ng-ai/openidea/blob/main/src/editor/…>