Tweak post query text on about page to make it more understandable for regular people

[simonwheatley]

When you read the about page, one of the cool new technical enhancements, the post query changes, is cloaked in technical language: "Post query optimized to avoid table scans". I think we should explain the benefits in such a way that a regular user skimming the point will think "cool!"

I suggest: "Post query optimized to avoid table scans, increasing performance for all sites, particularly those with large databases."

Yes, I realise we're in string freeze. ;P

See: #20766, #20423

String tweak to promote coolness

I think a change here makes a lot of sense. I almost did this in [20947].

Because we split the query, we should be telegraphing as much as possible the benefits of two queries, A) so people realize how great of a change this is, and B) so people who watch obsessively query counts don't go nuts over this.

westi proposed: "Post queries have been optimized to improve performance, especially for sites with large databases."

We're not avoiding table scans; rather, we're reducing the size of temporary tables that end up getting scanned.

If we wanted to include the technical details, it should be something like this: "Post queries have been optimized to improve performance, especially for sites with large databases, by reducing the size of temporary tables."

I think leaving off the last phrase is fine.

In [20959]:

Better description for 'Faster WP_Query'. Props simonwheatley. fixes #20789