A GPU-accelerated terminal emulator written in Rust on GPUI and Alacritty Terminal. Pixel-perfect typography, seamless TUI rendering, command palette, and sub-1% idle CPU.
The installer scripts detect your OS and architecture, pull the matching release, and drop the binary where it belongs. No daemon. No background service. No telemetry phone-home.
curl -fsSL https://raw.githubusercontent.com/diegoleteliers10/fasty/main/instalar.sh | bashApple Silicon & Intel · installs to /Applications · CLI symlink to /usr/local/bin/fastty
curl -fsSL https://raw.githubusercontent.com/diegoleteliers10/fasty/main/instalar.sh | bashWayland & X11 · installs to ~/.local/bin/fastty · honors $FASTTY_USER_INSTALL=1
irm https://raw.githubusercontent.com/diegoleteliers10/fasty/main/instalar.ps1 | iexWindows 10+ · PowerShell 5+ · auto-registers Start Menu shortcut on first launch
git clone https://github.com/diegoleteliers10/fasty && cd fasty && cargo build --releaseRust 1.78+ · 38 crates · ~90s on M-series · LTO + strip enabled in release profile
Manual builds and per-arch archives on thereleases page. First-run config lives at ~/.config/fastty/config.toml.
Fastty ships with five tuned palettes and reads custom JSON themes from ~/.config/fastty/themes/. Drop a file in, name it after the theme, switch from the command palette. Theme changes re-render every surface live: scrollback, topbar, tabs, settings, context menu.
Custom themes are JSON files. All 18 ANSI fields are optional exceptbackground andforeground; missing colors fall back to the foreground.
Fastty is small on purpose. No plugin runtime, no daemon, no telemetry. The whole binary is one Rust crate plus the bits you can see insrc/. Every feature earned its keep.
Direct GPU hardware quad rendering with per-cell advance control. Box-drawing characters and block elements are synthesized at exact pixel boundaries with zero hairline gaps for seamless TUI banners and logos.
The event loop rests when inactive. DEC mode 2026 synchronized output guarantees zero tearing or flicker during intensive CLI and TUI rendering.
Split any tab horizontally or vertically (⌘D / ⌘⇧D). Drag tabs to tear out standalone windows. Launch targeted sessions from scripts and AI agents via CLI options.
multi-window tear-out · CLI automation · spawn: 0.8 ms
Live status bar with Git, Kubernetes, AWS, and custom command widgets. Jump between prompts (⌘⇧↑ / ⌘⇧↓), and click auto-detected URLs, file paths, and hex colors.
Type gst, press Tab, get git status. Bundled defaults cover git, docker, rust, filesystem, search, system. VSCode-style placeholders, live reload. TUI apps take precedence and Tab passes through to vim, fzf, htop.
# snippets.toml
[snippet]
"gst" = "git status"
"gcm" = "git commit -m \"${1:message}\""
"cb" = "cargo build"
"dps" = "docker ps"
"ll" = "ls -lah"
"ports" = "ss -tlnp"Measurements on a MacBook Air M5 with Apple Silicon and 16 GB of Unified Memory, running macOS. Single tab, idle shell prompt, JetBrains Mono 14pt.
Compiling fastty 0.7.1 (38 crates)
Finished `release` profile [optimized] in 1.46s
Running benches/parser_bench
parser_plain_text time: [23.82 µs 23.92 µs 24.05 µs]
parser_sgr_ansi time: [40.87 µs 40.95 µs 41.05 µs]
parser_complex time: [23.41 µs 23.48 µs 23.59 µs]
Found 3 benchmarks; finish in 1.46sStartup = sh -c true round-trip · Plain text = cat 100k lines · ANSI/SGR = cat 50k lines of styled output · Fastty compiled with cargo build --release.