3c61e075fe
This PR combines a couple of optimizations to drastically reduce the time it takes to gather everything necessary for rendering Alacritty's terminal grid. To help with the iteration over the grid, the `DisplayIter` which made heavy use of dynamic dispatch has been replaced with a simple addition to the `GridIterator` which also had the benefit of making the code a little easier to understand. The hints/search check for each cell was always performing an array lookup before figuring out that the cell is not part of a hint or search. Since the general case is that the cell is neither part of hints or search, they've been wrapped in an `Option` to make verifying their activity a simple `is_some()` check. For some reason the compiler was also struggling with the `cursor` method of the `RenderableContent`. Since the iterator is explicitly drained, the performance took a hit of multiple milliseconds for a single branch. Our implementation does never reach the case where draining the iterator would be necessary, so this sanity check has just been replaced with a `debug_assert`. Overall this has managed to reduce the time it takes to collect all renderable content from ~7-8ms in my large grid test to just ~3-4ms. |
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| .builds | ||
| .github | ||
| alacritty | ||
| alacritty_config_derive | ||
| alacritty_terminal | ||
| docs | ||
| extra | ||
| scripts | ||
| .agignore | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| CHANGELOG.md | ||
| CONTRIBUTING.md | ||
| Cargo.lock | ||
| Cargo.toml | ||
| INSTALL.md | ||
| LICENSE-APACHE | ||
| Makefile | ||
| README.md | ||
| alacritty.yml | ||
| rustfmt.toml | ||
README.md
Alacritty - A fast, cross-platform, OpenGL terminal emulator
About
Alacritty is a modern terminal emulator that comes with sensible defaults, but allows for extensive configuration. By integrating with other applications, rather than reimplementing their functionality, it manages to provide a flexible set of features with high performance. The supported platforms currently consist of BSD, Linux, macOS and Windows.
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
- Announcing Alacritty, a GPU-Accelerated Terminal Emulator January 6, 2017
- A talk about Alacritty at the Rust Meetup January 2017 January 19, 2017
- Alacritty Lands Scrollback, Publishes Benchmarks September 17, 2018
- Version 0.3.0 Release Announcement April 07, 2019
- Version 0.5.0 Release Announcement July 31, 2020
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.
For everyone else, the detailed instructions to install Alacritty can be found here.
Requirements
- OpenGL 3.3 or higher
- [Windows] ConPTY support (Windows 10 version 1809 or higher)
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:
$XDG_CONFIG_HOME/alacritty/alacritty.yml$XDG_CONFIG_HOME/alacritty.yml$HOME/.config/alacritty/alacritty.yml$HOME/.alacritty.yml
Windows
On Windows, the config file should be located at:
%APPDATA%\alacritty\alacritty.yml
Contributing
A guideline about contributing to Alacritty can be found in the
CONTRIBUTING.md file.
FAQ
Is it really the fastest terminal emulator?
Benchmarking terminal emulators is complicated. Alacritty uses vtebench to quantify terminal emulator throughput and manages to consistently score better than the competition using it. If you have found an example where this is not the case, please report a bug.
Other aspects like latency or framerate and frame consistency are more difficult to quantify. Some terminal emulators also intentionally slow down to save resources, which might be preferred by some users.
If you have doubts about Alacritty's performance or usability, the best way to quantify terminal emulators is always to test them with your specific usecases.
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.
IRC
Alacritty discussions can be found in #alacritty on freenode.
License
Alacritty is released under the Apache License, Version 2.0.