-
Notifications
You must be signed in to change notification settings - Fork 113
Prevent compression from converging into low-quality compressions #3092
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
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
Contributor
Contributor
Benchmarks: TPC-H on NVMETable of Results
|
Contributor
Benchmarks: TPC-H on S3Table of Results
|
Contributor
Benchmarks: compressTable of Results
|
Contributor
Benchmarks: Clickbench on NVMETable of Results
|
Contributor
Author
|
This PR also makes a huge change in the cold runs benchmark. |
lwwmanning
approved these changes
Apr 23, 2025
CodSpeed Performance ReportMerging #3092 will improve performances by 14.6%Comparing Summary
Benchmarks breakdown
|
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Outdated suggestions cannot be applied.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.
File size before this change is about 21.18GB, after this change its 19.23GB.
The issue we found is that for large files, we tend to converge into not-compressing, or settling for mediocre compressions. With this change we don't keep if the encoding is canonical or otherwise non satisfactory, we don't keep that state and try again on the next chunk.