Why Your Emacs Terminal is Slow and How to Fix It (vterm, eat, ghostel, term, and ansi-term)

Emacs terminal buffers like eat, vterm, ghostel, term, and ansi-term can become slow when processing large volumes of standard output. Watching Emacs freeze while a build script dumps thousands of lines is frustrating, but terminal latency is not an unavoidable cost of living inside Emacs. Applying a few targeted configuration changes will eliminate scroll lag and restore immediate responsiveness. This article provides a configuration that speed up terminal buffers. Before we begin, please consider sharing this article on your website, blog, Mastodon, Reddit, X, LinkedIn, Hacker News, or other social media platforms. Sharing it will help other Emacs users discover … Continue reading