"Guy" wrote...

With my GPS, when I do this, I don't notice any drop in speed, but I must
turn off the win a little.

Anybody have any aurgument against boom parallel with the boat on a beat?

It depends on the specific boat, rig, and sails. My SeaPearl sailed best with
the boom no closer than the lee rail. I've sailed dinghies that sailed well
with the boom pulled in tight...

When you use your GPS, check the track made good as well as the speed. While
you may sense a bit of change in heading when you ease the traveler, the boat
may slip less to leeward, resulting in the same or better course made good.

Experiment in steady wind conditions, and see how your boat responds.