50-60% perf gain..

desiredChunks switch from a map to a vector..

it seems midway i changed what i was doing at one point, didn't change
the container..we're using :-D

i still have a lot of optimizations to do....though. But now we're down
from 12-15ms to 4-7ms..huge improvement..
print active and desired chunk count..so we get an idea of how many
qmap instead of std::map, no perf gains, that's a shame
fix issue after deleting activechunks and not moving the iterator properly