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Avoid filling a vector just to count the bits #15440

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Avoid filling a vector just to count the bits #15440

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4 changes: 1 addition & 3 deletions DataFormats/Detectors/CTP/src/CTPRateFetcher.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -233,9 +233,7 @@ double CTPRateFetcher::pileUpCorrection(double triggerRate)
if (mLHCIFdata.getFillNumber() == 0) {
LOG(fatal) << "No filling" << std::endl;
}
auto bfilling = mLHCIFdata.getBunchFilling();
std::vector<int> bcs = bfilling.getFilledBCs();
double nbc = bcs.size();
double nbc = mLHCIFdata.getBunchFilling().getPattern().count();
double nTriggersPerFilledBC = triggerRate / nbc / constants::lhc::LHCRevFreq;
double mu = -std::log(1 - nTriggersPerFilledBC);
return mu * nbc * constants::lhc::LHCRevFreq;
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