Input - output lag on macOS Sequoia 15.1 arm64

[ondrejvaroscak]

Bug description

I am using WebSSH since year, so I know it is and always has been a good performer. However since few days it began to lag on SSH connection to all my Ubuntu 24.04 servers. I can't tell about other hosts, since I only use Ubuntu 24.04.

The lag is on both input and output, sometime rendering writing configs in nano or going through logs with cat less unusable.

I have isolated the problem by using hosts on different hosting platform and network locations. I have also alternatively used macOS built-in terminal, and other terminal solutions as well as ssh connections between those hosts. WebSSH is only one that is introducing the input / output lag.

The lag is present on both my macOS machines, both M1 arm64 running latest Sequoia.

WebSSH Version 28.0.1436 Pro

Reinstalling the app brought nothing.

Video showing performance difference between WebSSH and macOS terminal: https://share.icloud.com/photos/03arQ6RwIoWyXJjIvGURN4dHw

[github-actions]

Thank you for your feedback! 🙏 Arnaud (@isontheline) will respond within a few hours. In the meantime, please feel free to add any additional information that may help us resolve or improve WebSSH.

[isontheline]

Hello @ondrejvaroscak 👋

WebSSH isn't a native app so will be slower than macOS terminal.

I have upgraded xterm.js library inside WebSSH on the latest beta release :
https://testflight.apple.com/join/QSrBK59z

Could you give it a try?

[ondrejvaroscak]

i understand, but this lag is new, it has not been there. it is something I experienced in last days.

The version in TestFlight you sent me is somehow faster, but the lag is still considerately bigger than other terminals (omitting the native macOS teminal).

[isontheline]

I will try to improve WebSSH over upcoming releases, can't promise anything as WebSSH has always been the slowest terminal app of the App Store when dealing with realtime flows

[isontheline]

Could you try the latest beta release please?

https://testflight.apple.com/join/QSrBK59z