MichaHoffmann commented on code in PR #11714:
URL: https://github.com/apache/arrow-rs/pull/11714#discussion_r4345569179
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arrow/benches/interleave_kernels.rs:
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@@ -222,5 +222,86 @@ fn add_benchmark(c: &mut Criterion) {
}
}
-criterion_group!(benches, add_benchmark);
+// Alternating sources prevent parent-row coalescing, while each selected list
+// still supplies a contiguous child range. Include singleton and skewed lists,
+// plus primitive children as a control for the existing bulk-copy path.
+fn bench_list_ranges(c: &mut Criterion) {
+ const ROWS: usize = 4096;
+ const SOURCES: usize = 6;
+ let indices: Vec<_> = (0..ROWS).map(|i| (i % SOURCES, i /
SOURCES)).collect();
+ for (shape, lengths) in [
+ ("1", &[1][..]),
+ ("15", &[15][..]),
+ ("90", &[90][..]),
+ ("mixed", &[0, 1, 15, 90, 0, 1, 1, 256][..]),
+ ] {
Review Comment:
I simplified it to 4 benchmarks!
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