metesynnada commented on issue #7113:
URL:
https://github.com/apache/arrow-datafusion/issues/7113#issuecomment-1658340249
I am checking the performance of
```rust
for (row, hash_value) in hash_values.iter().enumerate().rev() {
// Get the hash and find it in the build index
// For every item on the build and probe we check if it matches
// This possibly contains rows with hash collisions,
// So we have to check here whether rows are equal or not
if let Some((_, index)) = build_hashmap
.map
.get(*hash_value, |(hash, _)| *hash_value == *hash)
{
let mut i = *index - 1;
loop {
build_indices.append(i);
probe_indices.append(row as u32);
// Follow the chain to get the next index value
let next = build_hashmap.next[i as usize];
if next == 0 {
// end of list
break;
}
i = next - 1;
}
}
}
build_indices.as_slice_mut().reverse();
probe_indices.as_slice_mut().reverse();
```
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