The index walker used the ignore crate, which drops ignored files before we see them, and the watcher dropped their events too, so git-ignored files such as .env were missing from the index and Go to File, the Files tab and @ mentions could not reach them in any scope. As in IDEA, ignored folders stay out of the project but ignored files stay in it: each walked folder is also listed and the files the walker skipped are indexed by name only (no read, hash or symbols), the ignored flag is stored (index schema 3) so a file whose rules flip is re-parsed or dropped on the next scan, and the watcher reports ignored files in a separate list that only the index and open editors use (Local History, deployment, LSP and fsChanged see the same events as before). Watcher updates classify files by listing their folder with the scan's walker, so nested, global and info/exclude rules apply the same way. Co-authored-by: jaw52 <53564781+jaw52@users.noreply.github.com>
The IDE you know, rebuilt in Rust.
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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.
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 |
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 on
both sides. Both are measured from the outside, the same way: see
perf/compare to run it on your machine and projects.
Plugins
Plugins add actions, completion, quick fixes, tool windows, custom editors, themes, file icons and languages. They run as sandboxed WebAssembly components; themes, icon themes and languages need no code at all.
Install them from Settings › Plugins, or start your own with
openidea-plugin new — see Writing OpenIDEA plugins and
the official plugins. The plugin API is still a preview.
License
Apache 2.0. Bundled third-party assets are listed in THIRD_PARTY_LICENSES.md.
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