Forward-merge branch-23.08 to branch-23.10 #13760
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
For list types the ORC reader needs to generate offsets from the sizes of nested lists. This process was previously being parallelized over columns. In practice even with wide tables we have enough rows that parallelizing over rows always makes more sense, so this PR swaps the parallelization strategy. I also removed what appears to be an unnecessary stream synchronization. That likely won't affect performance in any microbenchmarks but is worthwhile in case it helps improve asynchronous execution overall. There are still noticeable bottlenecks for deeply nested lists, but those are in the decode kernels so optimizing them is a separate task for future work. Resolves #13674 Authors: - Vyas Ramasubramani (https://github.com/vyasr) Approvers: - Nghia Truong (https://github.com/ttnghia) - Vukasin Milovanovic (https://github.com/vuule) URL: #13708
|
SUCCESS - forward-merge complete. |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Forward-merge triggered by push to
branch-23.08that creates a PR to keepbranch-23.10up-to-date. If this PR is unable to be immediately merged due to conflicts, it will remain open for the team to manually merge.