|Long and Short Course|
Clearly swimmers do a lot more turns if swimming in a shorter pool. Swimmers actually turn faster than they swim! That is because of the push off the wall and the underwater strokes. So the same swimmer will generally swim the same event (stroke and distance) faster in a 25m pool than a 50m pool. How much faster will depend on the stroke.
When entering a gala, you will be asked to provide either a short course or long course entry time - i.e. based on a 25m pool or 50m pool - depending on where the event is being held. Throughout our website we provide both - we primarily show 25m pool times and convert times from longer pools to be 'as if in a 25m pool' - using externally provided conversion tables from British Swimming. So you should easily be able to pick out the relevant time to submit, and to compare to any event qualification times.
This also all explains why it's so important to practise dives/starts and turns - almost half of an event in a 25m pool can be starts and turns and they often decide who wins!!