OpenIDEA: A Fast Native IDE Rebuilt in Rust for IntelliJ Users

OpenIDEA brings IntelliJ keymaps and a native Rust core to 60+ languages, opening large repos in under a second.

Repository snapshot

Repository: l0ng-ai/openidea
Language: TypeScript
License: Apache-2.0
Stars: 7 315
Forks: 611

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What it is

OpenIDEA is a cross-platform integrated development environment that recreates the familiar IntelliJ IDEA experience inside a native desktop application. Built with a Rust core and Tauri, it integrates an editor, code insight engine, debugger, Git client, terminal, and database and HTTP clients for more than sixty languages. Instead of running on a heavy virtual machine, it is designed to deliver immediate startup and low memory footprints while preserving the keymaps and tool window layouts that heavy IDE users rely on.

Why it matters

Traditional full-featured IDEs often demand massive amounts of system memory and lengthy initialization sequences, turning routine project switches into frustrating bottlenecks. OpenIDEA addresses this resource disparity by leveraging Rust, keeping memory usage drastically lower and reducing project opening times to less than a second on modern hardware. This allows developers to retain comprehensive database and code intelligence tools without sacrificing system performance.

Key features

Open repositories like freqtrade in under a second with warm caches.
Maintain an average USS memory footprint of around 169 MB during standard tasks.
Run extensions safely inside sandboxed WebAssembly runtimes.
Utilize built-in database tools and HTTP clients alongside standard code editing windows.
Create custom plugins quickly using the provided CLI scaffolding commands.

Quick start

To clone and build OpenIDEA from source, use the following command:

git clone https://github.com/l0ng-ai/openidea

Who should try it

This project fits developers who are heavily accustomed to JetBrains workflows and keybindings but find traditional IDEs too resource-heavy. It is particularly suited for those working across multiple repositories who need instant window switching and minimal idle CPU overhead.

Verdict

OpenIDEA offers a compelling performance-focused alternative for developers tired of sluggish IDE startups. While its plugin ecosystem and deep analysis features are still evolving, its native speed and modest memory consumption make it well worth testing for daily workflows.

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Curated from the repository README and metadata. No hands-on test is claimed; evaluate it in a sandbox before production use.