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The changes (including the one in sysmodule.c that we decided to postpone) were all made when I was investigating the performance regression. They may not contribute significantly to the final result, but that is the direct trigger we made the change. I think linking that issue might give the people looking at the change an idea about why this change was made at the time.

Also, even though it might not be significant or even observable, this strictly improves the performance by removing an unnecessary comparison, so the gh issue is not that irrelevant :)

Considering the simplicity of this PR, maybe we can merge it? Not sure if @markshannon is busy recently.