Comment by wild_egg

Terminals already solved how to do this decades ago: pagers.

Write the full content to a file and have less display it. That's a single "render" you do once and write to a file.

Your TUI code spawns `less <file>` and waits. Zero rendering loop overhead, zero tearing, zero stutter. `less` is a 40-year-old tool that exists precisely to solve this problem efficiently.

If you need to stream new content in as the session progresses, write it to the file in the background and the user can use `less +F` (follow mode, like tail -f) to watch updates.