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Avoid std::map in EventSelectionModule #16396

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Avoid std::map in EventSelectionModule #16396

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12 changes: 8 additions & 4 deletions Common/Tools/EventSelectionModule.h
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Original file line number Diff line number Diff line change
Expand Up @@ -453,10 +453,11 @@ class BcSelectionModule
return; // don't do anything in case configuration reported not ok

int run = bcs.iteratorAt(0).runNumber();
// map from GlobalBC to BcId needed to find triggerBc
std::map<uint64_t, int32_t> mapGlobalBCtoBcId;
// sorted vector from GlobalBC to BcId needed to find triggerBc
std::vector<std::pair<uint64_t, int32_t>> vecGlobalBCtoBcId;
vecGlobalBCtoBcId.reserve(bcs.size());
for (const auto& bc : bcs) {
mapGlobalBCtoBcId[bc.globalBC()] = bc.globalIndex();
vecGlobalBCtoBcId.emplace_back(bc.globalBC(), bc.globalIndex());
}

int triggerBcShift = bcselOpts.confTriggerBcShift;
Expand All @@ -482,7 +483,10 @@ class BcSelectionModule

uint32_t alias{0};
// workaround for pp2022 (trigger info is shifted by -294 bcs)
int32_t triggerBcId = mapGlobalBCtoBcId[bc.globalBC() + triggerBcShift];
uint64_t triggerBC = bc.globalBC() + triggerBcShift;
auto it = std::lower_bound(vecGlobalBCtoBcId.begin(), vecGlobalBCtoBcId.end(), triggerBC,
[](const std::pair<uint64_t, int32_t>& p, uint64_t val) { return p.first < val; });
int32_t triggerBcId = (it != vecGlobalBCtoBcId.end() && it->first == triggerBC) ? it->second : 0;
if (triggerBcId && aliases) {
auto triggerBc = bcs.iteratorAt(triggerBcId);
uint64_t triggerMask = triggerBc.triggerMask();
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