Normal
An adapter should not affect the performance, if it is designed and constructed properly. And you just cannot tell from the outside. So, one cannot be 100% sure until one actually uses the adapter.Personally, I would prefer to use a cable that already has an right-angled end rather than to use an right-angled adapter connected to another straight cable. One fewer component and one fewer connection mean smaller chance to go wrong. Simplicity is beautiful.
An adapter should not affect the performance, if it is designed and constructed properly. And you just cannot tell from the outside. So, one cannot be 100% sure until one actually uses the adapter.
Personally, I would prefer to use a cable that already has an right-angled end rather than to use an right-angled adapter connected to another straight cable. One fewer component and one fewer connection mean smaller chance to go wrong. Simplicity is beautiful.