fix: EDM4hepReader sets number of hits on particles

[paulgessinger]

Also includes a drive-by fix to the size of the vectors being reserved.

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Summary by CodeRabbit

• New Features

  • Enhanced particle tracking functionality
  • Improved hit counting for generated and simulated particles

• Bug Fixes

  • Refined vector space reservation for particle collections
  • Added more precise tracking of generator particles

[coderabbitai]

Walkthrough

Hmm, changes to the EDM4hepReader, there are! A new variable nGeneratorParticles, introduced it is. Count generator particles not created in simulation, this variable shall. Modify logic for reserving vector space, the code does. Enhance hit counting for particles, the modifications aim to. Differentiate between generated and simulated particles, now possible it is.

Changes

File	Change Summary
Examples/Io/EDM4hep/src/EDM4hepReader.cpp	- Added nGeneratorParticles variable - Modified vector reservation logic - Implemented enhanced hit counting mechanism

Possibly related PRs

• fix: Optimize EDM4hep particle reading #3978: Modifications to EDM4hepReader.cpp involving particle collection and simulated hit management

Suggested labels

Component - Examples, automerge, Changes Performance

Suggested reviewers

• andiwand

Poem

Particles dance, quantum and bright
Generator, simulated - take flight!
Code weaves magic, hit counts grow
In EDM4hep's cosmic flow 🚀
Wisdom of bits, knowledge unfurled

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[coderabbitai]

Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI
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Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e61fa2d and 4e6d0ac.

📒 Files selected for processing (1)

• Examples/Io/EDM4hep/src/EDM4hepReader.cpp (4 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (2)

• GitHub Check: merge-sentinel
• GitHub Check: macos

🔇 Additional comments (2)

Examples/Io/EDM4hep/src/EDM4hepReader.cpp (2)

201-202: Wise addition of generator particles counter, this is!

Track particles not created in simulation, it does. Initialized before use, the counter is. Increment it correctly when needed, we do.

Also applies to: 221-223

---

253-256: Efficient memory allocation, achieved we have!

Reserve exact space for generator and simulated particles, we do. Prevent unnecessary reallocations, this will. Memory fragmentation, reduced it shall be.

[github-actions]

📊: Physics performance monitoring for 5680a72

Full contents

physmon summary

• ✅ Particles fatras
• ✅ Particles geant4
• ✅ Particles ttbar
• ✅ Vertices ttbar
• ✅ Truth tracking (KF)
• ✅ Truth tracking (GSF)
• ✅ Truth tracking (GX2F)
• ✅ Truth tracking (KF refit)
• ✅ Truth tracking (GSF refit)
• ✅ CKF finding performance | trackfinding | single muon | truth smeared seeding
• ✅ CKF fitting performance | trackfinding | single muon | truth smeared seeding
• ✅ CKF track summary | trackfinding | single muon | truth smeared seeding
• ✅ Seeding trackfinding | single muon | truth estimated seeding
• ✅ CKF finding performance | trackfinding | single muon | truth estimated seeding
• ✅ CKF fitting performance | trackfinding | single muon | truth estimated seeding
• ✅ CKF track summary | trackfinding | single muon | truth estimated seeding
• ✅ Seeding trackfinding | single muon | default seeding
• ✅ CKF finding performance | trackfinding | single muon | default seeding
• ✅ CKF fitting performance | trackfinding | single muon | default seeding
• ✅ CKF track summary | trackfinding | single muon | default seeding
• ✅ Seeding trackfinding | single muon | orthogonal seeding
• ✅ CKF finding performance | trackfinding | single muon | orthogonal seeding
• ✅ CKF fitting performance | trackfinding | single muon | orthogonal seeding
• ✅ CKF track summary | trackfinding | single muon | orthogonal seeding
• ✅ Seeding trackfinding | 4 muon x 50 vertices | default seeding
• ✅ CKF finding performance | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ CKF fitting performance | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ CKF track summary | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ Ambisolver finding performance | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ IVF notime | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ AMVF gauss notime | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ AMVF grid time | trackfinding | 4 muon x 50 vertices | default seeding
• ✅ Seeding trackfinding | ttbar with 200 pileup | default seeding
• ✅ CKF finding performance | trackfinding | ttbar with 200 pileup | default seeding
• ✅ CKF fitting performance | trackfinding | ttbar with 200 pileup | default seeding
• ✅ CKF track summary | trackfinding | ttbar with 200 pileup | default seeding
• ✅ Ambisolver finding performance | trackfinding | ttbar with 200 pileup | default seeding
• ✅ ML Ambisolver | trackfinding | ttbar with 200 pileup | default seeding
• ✅ AMVF gauss notime | trackfinding | ttbar with 200 pileup | default seeding
• ✅ AMVF grid time | trackfinding | ttbar with 200 pileup | default seeding

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[acts-project-service]

🔴 Athena integration test results [19e22e8]

Build job with this PR failed!

Please investigate the build job for the pipeline!