Micro-optimization in admin-footer.php

[TobiasBg]

After some work (related to the admin bar) on admin-footer.php in wp-admin a while ago ([18888], the latest change in the file), the file does some unnecessary stuff, like an implode() on a one-item array, that's constant and unchangable.

It's just minor, but still done on every page load in the Dashboard, so let's just micro-optimize it away.

The attached patch removes that unnecessary implode() and two local variables.

[TobiasBg]

Patch to remove unnecessary implode() call and two local variables

[nacin]

There used to be other members of the array here.

I don't really like "micro-optimization" arguments, but this can be argued for much simpler reasons: It improves code readability.

(And, often, code readability goes against what could be considered a "micro-optimization" — in those cases, readability should take precedence. In this case, they are on the same side.)

[nacin]

In [21366]:

Improve code readability and execution in admin-footer by removing a now-unnecessary implode(). props TobiasBg, fixes #21422.