[PR #9175/756fae80 backport][3.11] Speed up finding the reason if its unset #9213
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This is a backport of PR #9175 as merged into master (756fae8).
What do these changes do?
Previously a new enum object had to be created and the reason phase looked up. Since there are a limited number of codes, we can pre-build a dict with all the phases which makes the runtime code much simpler
Are there changes in behavior for the user?
no
Is it a substantial burden for the maintainers to support this?
no
related issue #2779
init request
before
after