Technology1 min read

OpenIDEA: The IDE you know, rebuilt in Rust

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In short

The application incorporates an editor, code insight, debugging tools, Git integration, a terminal, and database and HTTP clients for over 60 languages. In multi-run benchmarks on a 32-core Windows 11 machine using the freqtrade project, it used just 169 MB of RAM compared to over 2 GB in IntelliJ IDEA. However, this comparison reflects different computational workloads, as IntelliJ executes a deeper Python analysis before settling. Development prerequisites for the platform require Rust 1.96, Node 22, pnpm, and Tauri.

Key points

  • The software provides substantial reductions in resource overhead while preserving the to…: The software provides substantial reductions in resource overhead while preserving the tool windows and keymaps familiar to IntelliJ users.
  • Performance discrepancies exist partly because traditional IntelliJ builds perform signif…: Performance discrepancies exist partly because traditional IntelliJ builds perform significantly deeper language analysis prior to settling.
  • Contributors building the project locally must set up environments utilizing Rust 1.96, N…: Contributors building the project locally must set up environments utilizing Rust 1.96, Node 22, pnpm, and Tauri.

Sources checked by our analysis pipeline: 1

The IDE you know, rebuilt in Rust.

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openidea-promo.mp4

OpenIDEA brings the IntelliJ IDEA way of working — its keymap, its tool windows, its search-everything habits — to a native app with a Rust core.

Editor, code insight, debugger, Git, terminal, database and HTTP clients, for 60+ languages. Builds for macOS, Windows and Linux.

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 |

A release build of OpenIDEA from main

and IDEA with default settings and plugins, on

Windows 11, 32-core AMD, 62 GB RAM.

IDEA analyses Python more deeply, so "ready" doesn't mean the same work…

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