🍒[cxx-interop] Faster std::string initialization from String
#73413
+3
−1
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
Instead of appending characters one-by-one, which resizes the resulting string multiple times, let's reserve the required number of bytes beforehand. rdar://127423949 (cherry picked from commit 4513ca2)
|
@swift-ci please test |
egorzhdan
changed the title
std::string initialization from Stringstd::string initialization from String
DougGregor
approved these changes
May 7, 2024
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Outdated suggestions cannot be applied.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.
Explanation: Instead of appending characters one-by-one, which resizes the resulting string multiple times, let's reserve the required number of bytes beforehand.
Scope: This changes
std.string(_: Swift.String)convenience initializer in the overlay forCxxStdlib.Risk: Low, only affects the overlay for the C++ stdlib.
Testing: Already covered by existing compiler tests. There is an improvement in performance tests results.
Issue: rdar://127423949
Reviewer: @stephentyrone
Original PR: #72268