Racing with a dodger
We had a dodger on my C&C as well as a nice Edson cockpit table I refinished myself when I first bought the boat. We took them both off after one practice session. Once you get the hang of taking it on and off it goes pretty quickly, about a five minute job. In my case it was two screws, two pins, and a bunch of snaps.
On the C&C 37, with the traveller and main sheet controls and winches on top of the companionway it was simply impossible to move quickly and apply enough force without contorting yourself into odd positions or beating youself senseless.
So, in seconds per mile it was impossible to quantify. But in crew aggravation and lost time on tacks and trimming, the doger was a nightmare.
Also people bruised their butts on the table while trying to grind the winches and change sides during tacks.
Note that we did not get so over the top that we actually took all of the hardware off of the boat, we just tucked it down below.