Avoid animations during startup #15204
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lhecker
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Before After Side effect: Scrollbars are more responsive now w7rsxTfcrsAhEKgU.mp4 |
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DHowett
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Apr 19, 2023
| @@ -961,11 +961,11 @@ namespace winrt::Microsoft::Terminal::Control::implementation | |||
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| auto bufferHeight = _core.BufferHeight(); | |||
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| ScrollBar().Maximum(bufferHeight - bufferHeight); | |||
| ScrollBar().Maximum(0); | |||
| ScrollBar().Minimum(0); | ||
| ScrollBar().Value(0); | ||
| ScrollBar().ViewportSize(bufferHeight); | ||
| ScrollBar().LargeChange(std::max(bufferHeight - 1, 0)); // scroll one "screenful" at a time when the scroll bar is clicked | ||
| ScrollBar().LargeChange(bufferHeight); // scroll one "screenful" at a time when the scroll bar is clicked |
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there must have been a reason it was bufferHeight-1, right?
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I think it could be because the original author compared the behavior against less, where PgUp/Down moves by 29 lines in a 30 line viewport. But that's because the 30th line is the ":" command prompt. Setting this to bufferHeight does do what you'd think it does (= page by 30 rows / the viewport height) and is the more correct behavior IMO.
zadjii-msft
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Apr 20, 2023
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This fixes 3 sources for animations: * `TabView`'s `EntranceThemeTransition` causes tabs to slowly slide in from the bottom. Removing the transition requires you to override the entire list of transitions obviously, which is a global change. Nice. Am I glad I don't need to deal with the complexity of CSS. /s * `TabBase`, `SettingsTab` and `TerminalTab` were using a lot of coroutines with `resume_foreground` even though almost none of the functions are called from background tabs in the first place. This caused us to miss the initial XAML drawing pass, which resulted in animations when the tab icons would asynchronously pop into existence. It also appears as if `resume_foreground`, etc. have a very high CPU cost attached, which surprises me absolutely not at all given WinRT. The improvement is difficult to quantify because the run to run variation is very high. But it seems like this shaves about 10% off of the ~500ms startup delay on my PC depending on how you measure it. Part of #5907 * It starts when it should ✅ * It doesn't "exit" when it shouldn't ✅ (Scrolling, Settings reload, Bell `\a`, Progress `\e]9;4;2;80\e\\`) (cherry picked from commit 35b9e75) Service-Card-Id: 89001994 Service-Version: 1.17
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This fixes 3 sources for animations:
TabView'sEntranceThemeTransitioncauses tabs to slowly slide infrom the bottom. Removing the transition requires you to override the
entire list of transitions obviously, which is a global change. Nice.
Am I glad I don't need to deal with the complexity of CSS. /s
TabBase,SettingsTabandTerminalTabwhere using a lot ofcoroutines with
resume_foregroundeven though almost none of thefunctions are called from background tabs in the first place. This
caused us to miss the initial XAML drawing pass, which resulted in
animations when the tab icons would asynchronously pop into existence.
It also appears as if
resume_foreground, etc. have a very high CPUcost attached, which surprises me absolutely not at all given WinRT.
The improvement is difficult to quantify because the run to run
variation is very high. But it seems like this shaves about 10% off
of the ~500ms startup delay on my PC depending on how you measure it.
Part of #5907
PR Checklist
(Scrolling, Settings reload, Bell
\a, Progress\e]9;4;2;80\e\\)