Mryange opened a new pull request, #66688:
URL: https://github.com/apache/doris/pull/66688
### What problem does this PR solve?
Nullable comparison predicates used short-circuit `&&` to combine the null
map and comparison result. With `ColumnElementView`, Clang generated a scalar
loop instead of SIMD instructions.
This PR uses bitwise `&` for the two boolean operands, preserving the result
while allowing vectorization. It also adds a focused comparison predicate
benchmark.
Assembly changes from scalar `cmp/test` operations per row to vectorized
`vpcmpgtd` and `vpand` operations over multiple rows.
| Isolated second predicate | Before | After | Improvement |
|---|---:|---:|---:|
| 4096 rows, 4.5% null | 1.188 ns/row | 0.393 ns/row | 3.02x |
| 8192 rows, 4.5% null | 0.857 ns/row | 0.393 ns/row | 2.18x |
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR should
merge into -->
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