Improve memory consumption by cleaning up garbage references to pending promise without canceller#34
Merged
WyriHaximus merged 1 commit intoreactphp:masterfrom Jun 13, 2018
Merged
Conversation
clue
changed the title
Member
Author
|
Updated and removed WIP marker now that https://github.com/reactphp/promise/releases/tag/v2.7.0 has been released, this is now ready |
jsor
approved these changes
Jun 13, 2018
WyriHaximus
approved these changes
Jun 13, 2018
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
The previous changes in #33 improved memory consumption for settled promises somewhat. Similarly, this PR addresses memory consumption for pending promises that are no longer referenced.
Calling
timeout()on a promise which has no canceller function does successfully reject the promise. However, due to internal references, it keeps a cyclic reference to the input promise and as such shows some unexpected memory consumption and memory would not immediately be freed as expected. Let's not call this a "memory leak", because memory was eventually freed, but this clearly caused some unexpected and significant memory growth.I'm marking this PR as WIP because this includes a test for reactphp/promise#124 which is yet to be released as part of react/promise v2.7.0. Once this release is out, I'll update the version reference and this should be ready to be shipped.
Builds on top of #33