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README.md
Alacritty
Alacritty is the fastest terminal emulator in existence. Using the GPU for rendering enables optimizations that simply aren't possible in other emulators. Alacritty currently supports macOS and Linux, and Windows support is planned before the 1.0 release.
About
Alacritty is focused on simplicity and performance. The performance goal means
it should be faster than any other terminal emulator available. The simplicity
goal means that it doesn't have many features like tabs or scroll back as in
other terminals. Instead, it is expected that users of Alacritty make use of a
terminal multiplexer such as tmux.
This initial release should be considered to be pre-alpha software--it will have issues. Once Alacritty reaches an alpha level of readiness, precompiled binaries will be provided for supported operating systems.
Further information
- Announcing Alacritty, a GPU-Accelerated Terminal Emulator January 6, 2017
- A short talk about Alacritty at the Rust Meetup January 2017 (starts at 57:00)
Package Installation
The only supported installation method at this time is from source. Proper installers will be added prior to the 1.0 release of Alacritty.
Arch Linux
git clone https://aur.archlinux.org/alacritty-git.git
cd alacritty-git
makepkg -isr
Manual Installation
Prerequisites
-
Install
rustup.rs -
Clone the source code:
git clone https://github.com/jwilm/alacritty.git cd alacritty -
Make sure you have the right Rust compiler installed. Alacritty requires at least 1.15. Run
rustup override set stable rustup update stable
Ubuntu
On Ubuntu, you need a few extra libraries to build Alacritty. Here's an apt
command that should install all of them. If something is still found to be
missing, please open an issue.
apt-get install cmake libfreetype6-dev libfontconfig1-dev xclip
Arch Linux
On Arch Linux, you need a few extra libraries to build Alacritty. Here's a
pacman command that should install all of them. If something is still found
to be missing, please open an issue.
pacman -S cmake freetype2 fontconfig pkg-config make xclip
Fedora
On Fedora, you need a few extra libraries to build Alacritty. Here's a dnf
command that should install all of them. If something is still found to be
missing, please open an issue.
dnf install cmake freetype-devel fontconfig-devel xclip
openSUSE
On openSUSE, you need a few extra libraries to build Alacritty. Here's
a zypper command that should install all of them. If something is
still found to be missing, please open an issue.
zypper install cmake freetype-devel fontconfig-devel xclip
Slackware
Compiles out of the box for 14.2 For copy & paste support (middle mouse button) you need to install xclip https://slackbuilds.org/repository/14.2/misc/xclip/?search=xclip
Void Linux
On Void Linux, install following packages before compiling Alacritty:
xbps-install cmake freetype-devel freetype expat-devel fontconfig xclip
FreeBSD
On FreeBSD, you need a few extra libraries to build Alacritty. Here's a pkg
command that should install all of them. If something is still found to be
missing, please open an issue.
pkg install cmake freetype2 fontconfig xclip
Other
If you build Alacritty on another distribution, we would love some help filling in this section of the README.
Building
Once all the prerequisites are installed, compiling Alacritty should be easy:
cargo build --release
If all goes well, this should place a binary at target/release/alacritty.
BEFORE YOU RUN IT: Install the config file as described below; otherwise,
many things (such as arrow keys) will not work. If you're on macOS, you'll need
to change the monospace font family to something like Menlo.
Desktop Entry
Many linux distributions support desktop entries for adding applications to system menus. To install the desktop entry for Alacritty, run
sudo cp target/release/alacritty /usr/local/bin # or anywhere else in $PATH
cp Alacritty.desktop ~/.local/share/applications
Configuration
Although it's possible the default configuration would work on your system,
you'll probably end up wanting to customize it anyhow. There is a default
alacritty.yml at the git repository root. Alacritty looks for the configuration
file as the following paths:
$XDG_CONFIG_HOME/alacritty/alacritty.yml$XDG_CONFIG_HOME/alacritty.yml$HOME/.config/alacritty/alacritty.yml$HOME/.alacritty.yml
If neither of these paths are found then $XDG_CONFIG_HOME/alacritty/alacritty.yml
is created once alacritty is first run. On most systems this often defaults
to $HOME/.config/alacritty/alacritty.yml.
Many configuration options will take effect immediately upon saving changes to
the config file. The only exception is the font, dimensions and dpi sections
which requires Alacritty to be restarted. For further explanation of the config
file, please consult the comments in the default config 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. Keep in mind that Alacritty is very
much not looking to be a feature-rich terminal emulator with all sorts of bells
and widgets. It's primarily a cross-platform, blazing fast tmux renderer that
Just Works.
FAQ
- Is it really the fastest terminal emulator? In the terminals I've benchmarked against, alacritty is either faster, WAY faster, or at least neutral. There are no benchmarks in which I've found Alacritty to be slower.
- It's not fast! Why? There's a known bug affecting some versions of Mesa/libxcb where calls to glClear take an insanely long time. If it's not that, there's probably another bug. I'd be happy to look at the issue if you can provide some profiling information (wall time and otherwise).
- 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
iTerm2andTerminal.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. - Is wayland supported? Not yet. Alacritty is currently on a fork of glutin
that needs some updates to work with Wayland. To stop glutin from detecting
Wayland (e.g. for use on XWayland) launch Alacritty like this:
env WAYLAND_DISPLAY= alacritty - When will Windows support be available? When someone has time to work on it. Contributors would be welcomed :).
- My arrow keys don't work. It sounds like you deleted some key bindings from your config file. Please reference the default config file to restore them.
IRC
Alacritty discussion can be found in #alacritty on freenode.
License
Alacritty is released under the Apache License, Version 2.0.