[6.0] Improve RangeSet union performance #74996
Merged
Conversation
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
The existing implementation of `RangeSet.formUnion` performs a naive insertion of each range of one range set into the other. This requires shuffling the array of ranges down with each insertion, which can have quadratic performance. This change uses the known invariants of the ranges array to instead perform the merge in linear time. Each range in the resulting array is determined by finding the next lowest bound between the two range sets, and then searching for the first upper bound that isn't included in the merged range set contents. rdar://129296438
|
@swift-ci Please smoke test |
stephentyrone
approved these changes
Jul 5, 2024
|
@swift-ci Please test |
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Outdated suggestions cannot be applied.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.
Cherry pick of #74963 for Swift 6.0.