fix: Block terminal summary for xdist workers. #978
Merged
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Outdated suggestions cannot be applied.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.
Description
This PR prevents pytest_terminal_summary from executing in pytest-xdist worker processes.
I have seen this cause workers to use very high CPU (100% of a core or close) and cause a significant delay at the end of test runs (about 5 seconds).
I cannot see any reason why xdist worker should need to run the terminal summary, so simply preventing execution seems to be a sensible solution. Of course I may be wrong about this.
All tests appear to still pass. It is not obvious to me how to add a test for this change, but I do not think it is really necessary.
Related Issues
None.
Checklist
Additional Comments
No additional comments.