move to stream
update test
make also TrackSelector thread safe
let's start with 4 thread
speedup TrackSelector
faster, still View is infinetely slower than a vector
faster, much faster
remove double loops
revert changes in SimTrack
Merged MT_MTV from repository VinInn
remove unused collections
fix dr
seedup dr computation also for sim-tracks
Merge pull request #4669 from VinInn/MT_MTV

MT MTV (and speedup)