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[improvement](bitmap) Use shared_ptr in BitmapValue to avoid deep cop…
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…ying (#19101) (#21271)

Currently bitmapvalue type is copied between columns, it cost a lot of memory. Use a shared ptr in bitmap value to avoid copy data.
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@mrhhsg @morningman
mrhhsg authored and morningman committed Jul 19, 2023
1 parent c700b7c commit 23b9644
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