When comparing Tilda vs Alacritty, the Slant community recommends Alacritty for most people. In the question“What are the best terminal emulators for UNIX-like systems?” Alacritty is ranked 7th while Tilda is ranked 16th. The most important reason people chose Alacritty is:
Written in Rust with a philosophy focusing on speed and simplicity, Alacritty is one of the fastest terminal emulators out there.
Specs
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Pros
Pro Easily accessible drop-down
The drop-down function in Tilda does not get in the way and can be accessed at any time with a keyboard shortcut.
Pro Highly customizable
There are tons of customizations you can make: from adding colors to text, turning backgrounds transparent, setting the size to be "maximized", toggling scrollbar on and off, adjusting orientation/borders/animation, etc.
Pro Few dependencies
Tilda is a very minimal and lean terminal emulator. It requires very few dependencies and the amount of resources needed is small.
Pro Supports transparency
You can monitor information displayed by applications under Tilda.
Pro Tabs support
Tilda supports tabs. By default: to open a new tab press Ctrl + Shift + t. To move through them: Ctrl + PgUp/PgDn.
Pro Blazing fast rendering with GPU-accelerated
Written in Rust with a philosophy focusing on speed and simplicity, Alacritty is one of the fastest terminal emulators out there.
Pro Looks good
Alacritty looks very slick on Linux, especially with GNOME or i3.
Pro Simple configuration
The configuration file is very well made and easy to use. You can fine tune your preferences to perfection in a matter of minutes.
Pro Comprehensive font options
Alacritty can be configured to adjust line spacing (height), letter spacing (width), and individual character horizontal/vertical positions.
Pro Has support for image previews in w3m and ranger
Pro Has text ref-low when window is resized
Pro Fast and simple but with true color support
It's simple and fast like xterm or urxvt but with truecolor support which is a big plus if you use a terminal based code editor. Basically Alacritty has all the features you need and nothing you don't (if you're using tmux for multiplexing).
Cons
Con Contains some annoying bugs
Tilda can be buggy at times. For example, if you don't close it before shutdown, it may prompt you to reconfigure it all over again on the next boot.
Con Cannot into ligatures
Alacritty does not support ligatures in Fira Code, Iosevka etc.
Con Unreliable Font Rendering
Like a box of chocolate you never know what you're going to get.
Con Sacrifices basic features for raw performance
The Suzuki GSXR of terminals. Or your ditzy, blonde high school cheerleader; fast and pretty but not a lot going on under the hood.
Eschews a negative developmental philosophy towards including said functionality, with the official reason cited in project documentation as "Not within the realm of a terminal emulator" and ostensibly, "best left up to other tools such as terminal multiplexers" [such as screen or tmux]. Which is unfortunate when you factor in speed against terminal with the functionality built in vs their reliance on 3rd party tools:
tmux on alacritty: 'find /usr' time: 3.234s, cpu: 72%
tmux on konsole: find /usr' time: 1.777s, cpu: 96%
See issue here.