slow startup under tmux

[zozowell]

Hey experts,

just a quick check, does Ftxui have any known slow startup issue, especially when running under a tmux session, which has a long history. I'm a fresh newbie of ftxui, I experienced this slow startup issue when running just a very simple starter sample code under tmux, only a few input components wrapped by a window. It was blazing fast at the beginning, but after a few rounds of code changes, compiles and testing, the startup got very slow, it takes a few seconds to show the tui screen. I'm pretty sure it's not the compute resource limitation.

Before I start to do further debugging, may I have a quick check, is there possible a known issue like this? thanks!

[ArthurSonzogni]

Hello @zozowell

There are no know tmux issues sont far.
Please let us know what you will find!

[ArthurSonzogni]

I tried tmux on the "component/ftxui_example_homescreen" on linux and startup instantaneous.
Are you using a specific example and/or specific OS and/or terminal?

test-2025-06-05_14.42.09.mp4

[zozowell]

Thanks @ArthurSonzogni ! I started a new session, and latency issue is not obvious now, but it's definitely not as instantaneous as showed in your test. I'm on MacOS M4 though. Let me observe for another while and debug / report back if I encounter it again.

[zozowell]

I did not reproduce this problem anymore in the past days... close this question, sorry for the false positive.