I have a very short hybrid knot-splice on my web site. It is the splice part of the but there is no reason you cannot use it by itself. The bury is about 20 diameters so in 5/32 line about 3 inches. If that is too long, use an Ester hitch. I coined the name for a knot developed by Evans Starzinger as we were collaborating on making knots that would not slip in Amsteel. Here is the knot
http://www.bethandevans.com/pdf/estar.pdf
Here is my hybrid knot-splice
http://l-36.com/HybridHalyard.php
One of the advantages of my knot-splice is that it is short but also does not have an end sticking out like a knot. I then applied this hybrid idea to soft shackles but my button capsized. Brion then came up with a button that did not and thus was born his stronger soft shackle.