McParticleTools: Speed up for HepMC3.
Try to speed up the sort operation in TruthParticleCnvTool::convert by reducing the number of times we retrieve particle barcodes. See ATLASRECTS-7054.
Try to speed up the sort operation in TruthParticleCnvTool::convert by reducing the number of times we retrieve particle barcodes. See ATLASRECTS-7054.