I'm working on a TUI framework for Python, which does tend to push the terminal more than a typical app.

On certain apps, after a few seconds of updates the terminal starts glitching heavily. The more animation, the quicker this seems to happen.

It's probably best to show in a video:

This doesn't occur on other terminals. And I'm fairly sure (although not 100%) that this is not an error in Textual itself.

The video above is with an embedded xterm.js, but this issue also occurs in VSCode.

I haven't addressed flow control yet. But from experimentation, it only takes a a few hundred K before this issue occurs.

Details

• Browser and browser version: Chrome. Version 112.0.5615.49 (Official Build) (arm64)
• OS version: MacOS 13.3.1 (22E261)
• xterm.js version: 5.1.0"

Steps to reproduce

Install Textual:

pip install textual[dev]

Then in VS code integrated terminal:

textual easing