Ask geographicalId() directly from TransientTrackingRecHit.

CPU performance improvement, results stayed the same.
Require triplets to share two hits before inserting them to list of triplet pairs.

CPU performance improvement, results stay the same.
Use k-d tree for search of compatible triplets.

CPU performance improvement, results stay the same.
Identify the (non-)shared hits of triplets already when requiring two hits being shared.

CPU performance improvement, results stay the same.
Removed one repeated std::vector allocation+copy in mySort().

CPU performance improvement, results stay the same.
Removed the rest of relevant TransientTrackingRecHit::hit() calls.

CPU performance improvement, results stay the same.
Change pow(x, 2.) to x*x

pow() is supposedly (much) slower, although in the big picture the
effect on timing is very small. Physics results should stay the same.
Thread safe changes
TDC changes on top of CMSSW_7_0_X
removed gexp function
fixed regression in simParameters for the HO
Update hcalSimParameters_cfi.py

fixed typo
speed up eta phi
cache eta/phi spans
printout of towerArea
avoid recomputations of overlap
remove printout. no regression observed
compiles, removed multiple computation of indexing and new/delete, more to be done
move to float/constexpr
remove debug