sunchao commented on a change in pull request #1248:
URL: https://github.com/apache/arrow-rs/pull/1248#discussion_r800227877
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File path: arrow/src/compute/kernels/filter.rs
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@@ -119,17 +155,83 @@ impl<'a> Iterator for SlicesIterator<'a> {
}
}
+/// An iterator of `usize` whose index in [`BooleanArray`] is true
+///
+/// This provides the best performance on all but the least selective
predicates (which keep most
+/// / all rows), where the benefits of copying large runs instead favours
[`SlicesIterator`]
Review comment:
Oh sorry never mind. I see what it means now :)
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