mrhhsg opened a new pull request, #12704:
URL: https://github.com/apache/doris/pull/12704
# Proposed changes
Issue Number: close #xxx
## Problem Summary
Following the iteration order of the hash table will result in out-of-order
access to aggregate states, which is very inefficient.
Traversing aggregate states in memory write order can significantly improve
memory read efficiency.
### Test
> hash table items count: 3.35M
1. Before this optimization: insert keys into column takes 500ms
2. With this optimization only takes 80ms
## Checklist(Required)
1. Does it affect the original behavior:
- [ ] Yes
- [x] No
- [ ] I don't know
2. Has unit tests been added:
- [ ] Yes
- [x] No
- [ ] No Need
3. Has document been added or modified:
- [ ] Yes
- [x] No
- [ ] No Need
4. Does it need to update dependencies:
- [ ] Yes
- [x] No
5. Are there any changes that cannot be rolled back:
- [ ] Yes (If Yes, please explain WHY)
- [x] No
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
