Avoid computing the pVector of bachelor1 in the inner loop.

Author: ktf

PWGHF/TableProducer/trackIndexSkimCreator.cxx

@@ -4131,6 +4131,12 @@ struct HfTrackIndexSkimCreatorLfCascades {
               continue;
             }
 
+            // bachelor1 momentum is invariant across the inner (bachelor2) loop;
+            // pVector() is a dynamic column with no caching (it recomputes
+            // sin/cos on every call), so evaluate it once here instead of on
+            // every bachelor2 iteration.
+            const std::array<float, 3> pVecCharmBachelor1 = trackCharmBachelor1.pVector();
+
             // second loop over tracks
             for (auto trackIdCharmBachelor2 = trackIdCharmBachelor1 + 1; trackIdCharmBachelor2 != groupedBachTrackIndices.end(); ++trackIdCharmBachelor2) {
 
@@ -4154,7 +4160,7 @@ struct HfTrackIndexSkimCreatorLfCascades {
                 continue;
               }
 
-              if (!isPreselectedCandidateXic(pVecCasc, trackCharmBachelor1.pVector(), trackCharmBachelor2.pVector())) {
+              if (!isPreselectedCandidateXic(pVecCasc, pVecCharmBachelor1, trackCharmBachelor2.pVector())) {
                 continue;
               }