What is the best way to do a mitered half lap.

I have tried them on the router table using a jig (45 degree sled?) and a
guide bushing on the base plate. I got the idea from Hylton's Wood Working
with the Router only he used a pattern bit and a plunge router). The
process this way seems very SLOW.

My next attempt is going to be on the TS with a dado blade (cheapo, not
always flat bottom cuts: clean up with chisel?).

For those of you that do a lot of these and have tried both methods. What
works best?

Thanks