pub const DEFAULT_REBUILD_DENSITY_THRESHOLD: f32 = 0.1;Expand description
Density threshold to decide whether to rebuild a sparse ListViewArray.
A ListViewArray can accumulate unreferenced bytes in its elements buffer after
metadata-only operations like take and filter. When density (referenced fraction of elements)
falls below this threshold, the benefits of a rebuild may outweigh its cost.
This is a somewhat arbitrary rule-of-thumb and may be suboptimal depending on different use cases and list element dtypes.