Cleaned up memory dance in ipc::send and ipc::to.#421
Merged
jdm merged 1 commit intoservo:mainfrom Oct 17, 2025
Merged
Conversation
Signed-off-by: Narfinger <Narfinger@users.noreply.github.com>
jdm
approved these changes
Oct 17, 2025
Member
jdm
left a comment
jdm
left a comment
There was a problem hiding this comment.
This is definitely easier to follow now!
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
After this discussion (https://servo.zulipchat.com/#narrow/channel/263398-general/topic/IPC-Channel.20question/with/545510321)
and my own understanding the memory dance done does not seem to be necessary.
Additionally, we can replace the uses of std::mem with methods on the RefCell which makes the code cleaner and easier to understand. I also added some comments that future people are not confused why we handle memory in a thing that should serialize.
This might increase performance by a bit as my tests show 1-24% increase in the bench with most in the single digit. I noticed regressions
that seem to be just outliers as the surrounding benchmarks are fine.
On constraint devices this might be more of an increase in performance (15-42%) but these devices are very noisy.
Testing:
The included tests still work and a whole run of servospeedometer with this version of ipc-channel still worked. All of these tests were only done on Linux but it should be independent.
Signed-off-by: Narfinger Narfinger@users.noreply.github.com