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Improve conhost CPU usage during text selection #11634

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Oct 28, 2021
Merged

Improve conhost CPU usage during text selection #11634

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8 changes: 8 additions & 0 deletions src/host/selection.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -255,6 +255,14 @@ void Selection::ExtendSelection(_In_ COORD coordBufferPos)
srNewSelection.Top = _coordSelectionAnchor.Y;
}

// This function is called on WM_MOUSEMOVE.
// Prevent triggering an invalidation just because the mouse moved
// in the same cell without changing the actual (visible) selection.
if (_srSelectionRect == srNewSelection)
{
return;
}

// call special update method to modify the displayed selection in-place
// NOTE: Using HideSelection, editing the rectangle, then ShowSelection will cause flicker.
//_PaintUpdateSelection(&srNewSelection);
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