I’ve been using a double Davey knot for years and years. Earlier in the winter when I was trying to do some research on tippet, I found a video of this guy doing a really in depth knot testing. I can’t find the video at the moment, but I’ll try looking again later.
I don’t remember exactly how they initially narrowed down the knots they would test, but I believe it was on popularity or commonality of use. Anyhow, to make as long story short, I was surprised to learn that the Davey was one of the weakest knots they tested. Their winner was the trilene knot. I’m going to give it a try this year and see how it works. Granted, I think it looks like a variation on the improved clinch knot, but it did have the highest break strength - in their test.