Lux v1.5.5
GitHub Download
v1.5.5 Universal macOS disk image and Linux packages on the tag →

The ultra-fast, zero-bloat
native code editor in Rust.

Sublime Text speed and muscle memory. Modern Rust safety and intelligence. Hardware-accelerated with WGPU, sub-8ms typing latency, Tree-sitter incremental syntax, and zero cloud bloat.

Latest GitHub Release tag release, login required
v1.5.5 macOS disk image
~62 ms Cold Startup Time
2–4 ms Key-to-Pixel Latency
28 MB Base Memory Footprint
0.0% CPU Idle / Zero Telemetry
Lux window editing docs/screenshots/example.rs
example.rs, captured from the renderer at scale factor 2.
Lux command palette open over example.rs
Command palette over monokai.rs, query sel, captured from the renderer at scale factor 2.
Lux Settings page with font size stepper, ligatures toggle, and indent style menu
Settings page between the tab bar and the status bar, captured from the renderer at scale factor 2.
Engineered for Purists

Speed you can feel. Cleanliness you can trust.

No Electron. No Chromium runtime. No forced telemetry or invasive AI bots. Just raw Rust performance tuned to human reaction limits.

⚙

Settings Page

New in v1.5.5: Settings is an opaque page between the tab bar and the status bar. Toggles, steppers, and menus change the real settings. The wheel scrolls the page.

⚡

Sublime Text Muscle Memory

Complete fidelity with classic keymaps: Cmd+D multi-cursor selection, Cmd+K, Cmd+D skip occurrence, column/rectangular editing (Option+Drag), and parallel multi-caret clipboards.

📐

Real Multi-Pane Architecture

New in v1.1.0: Independent PaneView pipelines supporting 2-4 columns, rows, 2x2 grids, interactive 60/120Hz draggable dividers with 50/50 reset, and live cloned buffer views.

🚀

Hardware-Accelerated WGPU

Direct GPU vertex-cached glyph rendering using modern WGPU primitives. Native 120Hz ProMotion support on Apple Silicon with 2–4ms key-to-pixel latency.

🌲

Incremental Tree-sitter

Zero UI freezes during typing. Non-blocking background parsing coupled with an instant $O(K)$ token shifting algorithm guarantees 120 FPS frame stability on massive files.

🛠️

In-Process Git & Terminal

Integrated gix Git engine with zero shell-out lag. Gutter diff markers, floating 3-way merge resolution, and a built-in pseudo-terminal (PTY) with ANSI 24-bit truecolor.

🛡️

Absolute Privacy & Zero Bloat

Strictly zero telemetry, zero analytics, zero external network calls, and zero integrated LLM bloat. Plugins execute inside sandboxed WebAssembly Component Model containers.

New in Release v1.1.0

The Real Multi-Pane Split Editor.

The picture is the live window after the two-column layout command. Lux keeps an independent viewport in each pane:

  • ✓
    Independent Viewports & Cursors: Each pane preserves its own scroll offsets, multicursors, code folding trees, and syntax cache.
  • ✓
    Cloned Views of the Same File: Open the same source buffer in two panes side-by-side with instantaneous real-time editing synchronization and decoupled scrolling.
  • ✓
    Fluid Draggable Dividers: Smooth proportional split resizing at 60/120 Hz with safety clamping and instant double-click 50/50 balance.
  • ✓
    Seamless Navigation: Switch focus with Ctrl+1..4, move documents across groups with Ctrl+Shift+1..4, or divide layout with Cmd+Option+1..5.
Lux with two columns of example.rs
Two-column layout of the same file, captured from the live window.
Tested & Verified

Measurable, uncompromised speed.

Benchmarked on Apple Silicon (M-Series) under real workloads against standard desktop editors.

Benchmark Metric Lux (Rust) Sublime Text 4 VS Code (Electron)
Cold Startup Time ~62 ms ~120 ms ~1,850 ms
Key-to-Pixel Latency 2–4 ms 5–8 ms 35–65 ms
Memory Footprint (Idle RSS) ~28 MB ~45 MB ~350 MB+
Memory on 100 MB File ~1.6× file size ~2.1× file size ~9–14× (or crash)
Rendering Engine Native WGPU (120Hz) Skia / OpenGL Chromium DOM (HTML/CSS)
Binary Distribution Size 12.7 MB ~45 MB ~380 MB
Background Telemetry & Cloud 0.0% (Strictly None) Update checks only Continuous Telemetry
Ergonomics

Essential Keyboard Shortcuts

Your fingers already know how to use Lux.

Get Started Today

Download Lux v1.5.5

macOS is the focus. The v1.5.5 GitHub Release includes the universal disk image lux-macos-universal.dmg, plus lux-linux-x86_64 and lux-linux-amd64.deb. Pull-request CI builds the same image as an artifact and does not publish it. Windows .msi stays outside CI.

Latest GitHub Release Linux packages on the tag
v1.5.5 macOS disk image Universal .dmg
Or build directly from source using Rust: 
git clone https://github.com/lcajigasm/lux.git
cd lux && cargo build --release