Copilot TUI hogs CPU

Describe the bug

When I open copilot TUI, it hogs one CPU (~6-7% on a 16 core machine).

After I run a prompt, that number multiplies to e.g. 2, 3 or 4 CPUs hogged while the TUI sits idle.

Affected version

GitHub Copilot CLI 1.0.83.

Steps to reproduce the behavior

1. start copilot TUI, observe CPU usage (sometimes i need to type a bit in the prompt box for the issue to appear)
2. run a prompt or two, observe CPU usage

Expected behavior

copilot TUI CPU usage is negligible while the program sits idle.

Additional context

Ubuntu 24.04, x86_64, GitHub Copilot CLI 1.0.83..

Logs below. I opened a session, typed in the prompt box (already 1 CPU hogged at that point), then gave a plan command. after the plan.md was written and the TUI was idle, it used 3-4 CPUs.

process-1788769402724-57168.tar.gz

在 Ubuntu 24.04 上使用 GitHub Copilot CLI 1.0.83 重现该报告，先观察空闲的 TUI，然后运行一个或两个 prompt。检查提供的 process-1788769402724-57168.tar.gz 日志，并比较 prompt 前后的 CPU 使用率。当打开并使用 prompt 后，空闲 TUI 的 CPU 使用率可以忽略不计时，即表示完成。