Avoid is possible a expensive function call (src/backend/utils/adt/varlena.c) - Mailing list pgsql-hackers

Hi,

The function var_strcmp is a critical function.

Inside the function, there is a shortcut condition,

which allows for a quick exit.

Unfortunately, the current code calls a very expensive function beforehand, which if the test was true, all the call time is wasted.
So, IMO, it's better to postpone the function call until when it is actually necessary.

best regards,

Ranier Vilela