This small piece of metadata is intended to expose record counts to
developers as an information radiator: from time to time, SilverStripe
tables can get very large, and this exposes this information without
the developer seeking it out.
It’s reasonable to expect that count(*) calls aren’t too time consuming,
even on large tables.
On a small test run, dev/build execution went from 3.85s to 3.98s (a 3%
or 130ms increase). Given the small relative impact it should be okay.
Where this is inappropriate, it can be disabled with a config setting.
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