Dandandan commented on code in PR #5941:
URL: https://github.com/apache/arrow-datafusion/pull/5941#discussion_r1161804695
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datafusion/core/src/physical_plan/joins/hash_join.rs:
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@@ -543,7 +542,7 @@ async fn collect_left_input(
)
})? / 7)
.next_power_of_two();
- // 32 bytes per `(u64, SmallVec<[u64; 1]>)`
+ // 32 bytes per `(u64, Vec<[u64; 1]>)`
Review Comment:
This probably is a trade-off, joins with unique keys will probably get
slower.
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