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MM: particles 2 tracks alternate process test #5397

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Merged
ddobrigk merged 2 commits into from
Mar 27, 2024
Merged

MM: particles 2 tracks alternate process test #5397

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MM: particles 2 tracks alternate process test
ddobrigk Mar 27, 2024
6375c00
Please consider the following formatting changes (#271)
alibuild Mar 27, 2024
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16 changes: 15 additions & 1 deletion PWGMM/Mult/TableProducer/particles2tracks.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -40,14 +40,28 @@ struct ParticlesToTracks {

void process(aod::McParticles const& particles)
{
if (doprocessIndexingCentral) {
if (doprocessIndexingCentral || doprocessIndexingCentralFast) {
p2t.reserve(particles.size());
}
if (doprocessIndexingFwd) {
p2tmft.reserve(particles.size());
}
}

void processIndexingCentralFast(aod::McParticles const& mcParticles, LabeledTracks const& tracks)
{
// faster version, but will use more memory due to pre-allocation
std::vector<std::vector<int>> part2track(mcParticles.size());
for (auto& track : tracks) {
if (track.has_mcParticle())
part2track[track.mcParticleId()].push_back(track.globalIndex());
}
for (auto& mcParticle : mcParticles) {
p2t(part2track[mcParticle.globalIndex()]);
}
}
PROCESS_SWITCH(ParticlesToTracks, processIndexingCentralFast, "Create reverse index from particles to tracks: more memory use but potentially faster", false);

void processIndexingCentral(aod::McParticle const&, soa::SmallGroups<LabeledTracks> const& tracks)
{
trackIds.clear();
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