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README.md

Alacritty

<img width="200" alt="Alacritty Logo" src="extra/logo/compat/alacritty-term+scanlines.png">

Alacritty is the fastest terminal emulator in existence. Using the GPU for rendering enables optimizations that simply aren't possible without it. Alacritty currently supports macOS, Linux, BSD, and Windows.

Alacritty running vim inside tmux

About

Alacritty is a terminal emulator with a strong focus on simplicity and performance. With such a strong focus on performance, included features are carefully considered and you can always expect Alacritty to be blazingly fast. By making sane choices for defaults, Alacritty requires no additional setup. However, it does allow configuration of many aspects of the terminal.

The software is considered to be at a beta level of readiness -- there are a few missing features and bugs to be fixed, but it is already used by many as a daily driver.

Precompiled binaries are available from the GitHub releases page.

Features

You can find an overview over the features available in Alacritty here.

Further information

Installation

Alacritty can be installed by using various package managers on Linux, BSD, macOS and Windows.

Prebuilt binaries for macOS and Windows can also be downloaded from the GitHub releases page.

On Windows, Alacritty requires winpty to emulate UNIX's PTY API for versions older than Windows 10 (October 2018 Update) and Microsoft's VC++ redistributable. The winpty agent (winpty-agent.exe) must be in the same directory as the Alacritty executable and is available through the GitHub releases page.

For everyone else, the detailed instructions to install Alacritty can be found here.

Configuration

You can find the default configuration file with documentation for all available fields on the GitHub releases page for each release.

Alacritty doesn't create the config file for you, but it looks for one in the following locations:

  1. $XDG_CONFIG_HOME/alacritty/alacritty.yml
  2. $XDG_CONFIG_HOME/alacritty.yml
  3. $HOME/.config/alacritty/alacritty.yml
  4. $HOME/.alacritty.yml

Windows

On Windows, the config file should be located at:

%APPDATA%\alacritty\alacritty.yml

Contributing

A full guideline about contributing to Alacritty can be found in the CONTRIBUTING.md file.

Issues (known, unknown, feature requests, etc.)

If you run into a problem with Alacritty, please file an issue. If you've got a feature request, feel free to ask about it. Please just keep in mind Alacritty is focused on simplicity and performance, and not all features are in line with that goal.

Before opening a new issue, please check if it has already been reported. There's a chance someone else has already reported it, and you can subscribe to that issue to keep up on the latest developments.

FAQ

Is it really the fastest terminal emulator?

In the terminals we've benchmarked, Alacritty is either faster or way faster than the others. If you've found a case where this isn't true, please report a bug.

Why isn't feature X implemented?

Alacritty has many great features, but not every feature from every other terminal. This could be for a number of reasons, but sometimes it's just not a good fit for Alacritty. This means you won't find things like tabs or splits (which are best left to a window manager or terminal multiplexer) nor niceties like a GUI config editor.

macOS + tmux + vim is slow! I thought this was supposed to be fast!

This appears to be an issue outside of terminal emulators; either macOS has an IPC performance issue, or either tmux or vim (or both) have a bug. This same issue can be seen in iTerm2 and Terminal.app. I've found that if tmux is running on another machine which is connected to Alacritty via SSH, this issue disappears. Actual throughput and rendering performance are still better in Alacritty.

IRC

Alacritty discussion can be found in #alacritty on freenode.

Wayland

Wayland is used by default on systems that support it. Using XWayland may circumvent Wayland specific issues and can be enabled through:

env WINIT_UNIX_BACKEND=x11 alacritty

License

Alacritty is released under the Apache License, Version 2.0.