vector: improve Apply performance on homogenous Dynamics - #7340
Merged
Merged
Conversation
On some workloads, Apply encounters many Dynamics whose slots all come from the same vector (i.e., all elements of Dynamic.Tags are identical). "Unwrap" these Dynamics with the goal of avoiding rip and stitch. This significantly improves performance on queries against records with nullable fields that are rarely null.
mattnibs
approved these changes
Sep 21, 2026
This file contains hidden or 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
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
On some workloads, Apply encounters many Dynamics whose slots all come from the same vector (i.e., all elements of Dynamic.Tags are identical). "Unwrap" these Dynamics with the goal of avoiding rip and stitch. This significantly improves performance on queries against records with nullable fields that are rarely null.
Fixes #7190. (Mostly. This claws back much but not all of the performance lost with #6633 but additional, smaller improvements are possible.)