Run tests in parallel by default - #22939
Open
NickSdot wants to merge 8 commits into
Open
Conversation
Member
|
Not an expert in conflicts file. Should cc @bukka in this. |
LamentXU123
removed their request for review
July 30, 2026 12:36
Contributor
Author
FWIW, the doc change is only a clarification because after this tests run in parallel by default. This PR has no changes to |
NickSdot
marked this pull request as draft
July 30, 2026 13:24
arnaud-lb
approved these changes
Jul 30, 2026
arnaud-lb
left a comment
arnaud-lb
left a comment
Member
There was a problem hiding this comment.
Looks good to me otherwise, but I will wait for other reviews
arnaud-lb
reviewed
Jul 30, 2026
NickSdot
force-pushed
the
perf/parallel-by-default
branch
from
July 30, 2026 15:09
06569f4 to
9fb7077
Compare
NickSdot
force-pushed
the
perf/parallel-by-default
branch
from
July 30, 2026 21:23
0374c74 to
472acd1
Compare
NickSdot
commented
Jul 31, 2026
NickSdot
marked this pull request as ready for review
July 31, 2026 06:34
arnaud-lb
approved these changes
Jul 31, 2026
arnaud-lb
left a comment
arnaud-lb
left a comment
Member
There was a problem hiding this comment.
Looks good to me otherwise!
I will wait a few days and merge if there are no objections.
Open
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Extracted from #22917.
Runs the test suite in parallel by default; automatically selects up to 10 workers. Explicit
-j1remains the opt-out to run tests serial. Smaller batches improve balancing.Intended to merge after #22957 so eligible Windows test subprocesses no longer use the shell wrapper when parallel execution becomes the default.
Result
Values in seconds; measured on macOS.
(none)Reproduction:
Ref: 9b36b91 (review comments)
cc @arnaud-lb