https://github.com/telegramdesktop/tdesktop/issues/8833 复现了这个奇怪的 bug，输入法的延迟会变很高，然后 cpu 占用也会上升。据说是 Qt 的问题？
GitHub
100% CPU usage and slow input response when Windows spellchecking is enabled · Issue #8833 · telegramdesktop/tdesktop
Steps to reproduce Open settings and enable system spellchecking Open any chat tab Write a lot of symbols in chat textbox like: ........................................................................