MCTruthClassifier: HepMC3 speedups.

Speed up particleTruthClassifier(ConstgenParticlePtr) by avoiding fetching the barcode of each particle. Introduce particleTruthClassifier(const HepMcParticleLink&), which can take advantage of xAODTruthParticleLinkVector::find().

See ATLASRECTS-7054.

WARNING: big files (>100K) are found in the changeset

112K in file PhysicsAnalysis/MCTruthClassifier/Root/MCTruthClassifierGen.cxx

This merge request affects 1 package:

• PhysicsAnalysis/MCTruthClassifier

This merge request affects 3 files:

• PhysicsAnalysis/MCTruthClassifier/MCTruthClassifier/IMCTruthClassifier.h
• PhysicsAnalysis/MCTruthClassifier/MCTruthClassifier/MCTruthClassifier.h
• PhysicsAnalysis/MCTruthClassifier/Root/MCTruthClassifierGen.cxx

Adding @zmarshal as watcher

added Analysis analysis-review-required master review-pending-level-1 labels

The system determined that CI tests (with names matching "^CITest_SimulationRun(2|3)AF3.*$") are not needed for this code change. They are not run. This is not an indicator to restart the job.

CI Result SUCCESS (hash 296acdb0)

	Athena	AthSimulation	AthGeneration	AnalysisBase	AthAnalysis	DetCommon
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AnalysisBase: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
DetCommon: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 58677]

Approved
Albert (L1)

added review-approved label and removed review-pending-level-1 label

added analysis-review-approved label and removed analysis-review-required label

merged

mentioned in commit 6b407992

added sweep:ignore label