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Better SciFi efficiencies

Daniel Campora Perez requested to merge dcampora_fpisani_better_scifi_efficiencies into master

Improved significantly efficiencies of Forward tracking algorithm:

  • Initial window has been tweaked and reworked.
  • Extrapolation to UV and X has been tuned and depends on single parameters (simplified).
  constexpr float chi2_mean_extrapolation_to_x_layers_single = 4.f;
  constexpr float chi2_stddev_extrapolation_to_x_layers_single = 8.f;
  constexpr float chi2_mean_extrapolation_to_uv_layers_single = 10.f;
  • X layers are revisited in algorithm lf_extend_missing_x_t after quality_filter_x to recover missing X hits, increasing hit efficiency by about 8% in all categories.
  • As a consequence of adding lf_extend_missing_x_t, computing performance drops by about 5%.

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