Performance optimisations

[andresailer]

Running Z->UDS sample in CLIC Detector no significant changes in the reconstructed tracks, except the track parameters errors change in the last digit.
e.g.:

480c480
<  errors:   +5.132359e-03 | -2.099785e-05, +1.122613e-07 | -2.453261e-08, +1.115386e-10, +2.402474e-13 | +2.830744e-04, -1.436741e-06, -4.184194e-10, +3.926882e-01 | +2.395653e-07, -1.408824e-09, -6.237775e-12, -8.192144e-04, +1.860208e-06 |
---
>  errors:   +5.132359e-03 | -2.099785e-05, +1.122613e-07 | -2.453261e-08, +1.115386e-10, +2.402474e-13 | +2.830744e-04, -1.436741e-06, -4.184195e-10, +3.926882e-01 | +2.395653e-07, -1.408824e-09, -6.237775e-12, -8.192144e-04, +1.860208e-06 |
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BEGINRELEASENOTES

• Performance optimisation from running profiler (Intel VTune Amplifier)
  ENDRELEASENOTES