Remove the remaining usages of new {Name,Cmd}
in favor of {Name,Cmd}.get
#7171
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Using
new {Name,Cmd}
should be avoided, since it creates a new object on every call, whereas{Name,Cmd}.get
uses caches to only create one object regardless of how many times they are called.Most of these are found in the unit-tests, where increased memory usage probably doesn't matter very much. But it still seems good to get rid of those cases, since no part of the codebase ought to advertise that usage.
Given the small size of the patch, I'm also tweaking a few comments and class names.