f70eb13f75
`kill_tree` and `kill_tree_of` run `taskkill /T /F /PID` on Windows even when the child has no descendants, which is the common case for a program a plugin started, read from and closed. `taskkill` is a process spawn — ~0.7 s here, measured on this machine — and it runs inside host calls that are inside a plugin call's budget: dropping eight process handles at once overran a 5 s budget, so the plugin was trapped for something the host did. When `descendants(pid)` is empty the child itself is all there is to kill, and both callers already do that (`kill_tree` follows with `child.kill()` + `child.wait()`, `kill_tree_of` leaves the child to its owner), so the spawn buys nothing. Skip it. Verified: - `cargo test -p ide-core` → 77 passed. - `cargo test -p ide-host --test plugins` → 95 passed, including `a_plugin_keeps_a_process_running_behind_a_handle`, which fails on unmodified `main` on Windows (`plugin "misbehave" timed out after 5s` at its `childdrop` step, which drops eight handles) and now passes in 9.7 s instead of 20 s. - clippy `--all-targets -D warnings` and `cargo fmt --check` clean; no component or WIT change, so nothing to rebuild. Co-authored-by: chao <[email protected]> Co-authored-by: l0ng-ai <[email protected]>
The IDE you know, rebuilt in Rust.
Download · Benchmark · Plugins · Community
https://github.com/user-attachments/assets/234dd54c-1255-4b3a-b35c-533d78d737c0
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. On Windows, if you'd
rather skip the installer, each release also ships a portable zip — unpack it
and run openidea.exe.
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.
Community
-
Discord — questions, feedback and release news.
-
WeChat group — scan to join:
Contributors
License
Apache 2.0. Bundled third-party assets are listed in THIRD_PARTY_LICENSES.md.
Not affiliated with JetBrains. IntelliJ IDEA is a trademark of JetBrains s.r.o.