Switch the pre22 warning to use CopyOnWriteArraySet.#23976
Merged
Conversation
This data structure is better for cases where writes are rare and reads common. When this warning path is it, the writes only occur exactly once per CVE-affected type, and reads occur once per every parse of those types. Broadly people sensitive by this performance concern should really regen their gencode, but this should help take the edge off of people who first upgrade to 4.x and then look to incrementally regen any ancient gencode. Fixes #23963 PiperOrigin-RevId: 819238880
esrauchg
approved these changes
Oct 14, 2025
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
3 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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
This data structure is better for cases where writes are rare and reads common. When this warning path is it, the writes only occur exactly once per CVE-affected type, and reads occur once per every parse of those types.
Broadly people sensitive by this performance concern should really regen their gencode, but this should help take the edge off of people who first upgrade to 4.x and then look to incrementally regen any ancient gencode.
Fixes #23963
PiperOrigin-RevId: 819238880
Cherry-pick of c131253