Actually only one way is a scarf cut, the other is a joint.

I cut scarfs on my radial arm saw. I made an angle jig that holds the strip at a slight angle and I can stack up about 7 strips at once and cut a 7 to 1 scarf on the ends at once. You can do the same with a table saw or even a chop saw. So, basically cutting scarfs takes seconds once you make a simple angle jig.

Basically, on a table saw you would just adjust your angle guide to around a 7 to 1 cut. I would attach a piece of scrap wood to it to give it some length. Then press around 5 - 7 strips against it and use a spring clamp to hold them to the angle guide and push them through.