For DP overhead, it was discussed in JLP's Kangaroo thread.
His program tries to give a user the best DP to use, that will create the least amount of overhead.
The issue comes when you have multiple machines, like if you are using the server, it does not account for this, but I am pretty sure, it was discussed on how to come up with a more "optimal" DP, to decrease DP overhead, based on how many kangaroos are expected to be used.
Imagine a 10-band highway, and you have 1000 cars, and they all need to go from point A to point B before moving from point B to point C.
Yeah, I don't understand this. But it's ok, I don't need to. I don't understand how the speed is tied to this...the same would be true for the fastest of fastest kangaroos, using the fastest of fastest CPUs.
I know that more but slower kangaroos, will solve faster than less, but faster kangaroos, when dealing with higher bit ranges. Speed versus "efficiency / optimization" (DP overhead) are two different things in my opinion.
I solved #120, #125 and #130 for now
I still do not believe you solved these, or was the first to solve 120. You could easily sign a message for 125 and 130 to prove this. Maybe you did and I missed it? Or are you still waiting for your merit points to be "bumped" up before doing so?