From 21c8c6e6dbea518165b4caf96b8826f610916afd Mon Sep 17 00:00:00 2001
From: Nathan Baltzell <baltzell@jlab.org>
Date: Mon, 4 May 2026 16:38:28 -0400
Subject: [PATCH 1/2] reduce number of doca calculations

---
 .../src/main/java/org/jlab/clas/swimtools/Swim.java      | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java b/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java
index 66897dc346..2ee324a70e 100644
--- a/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java
+++ b/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java
@@ -1365,12 +1365,13 @@ public boolean stopIntegration(double t, double[] y) {
             Point3D dcaCand = new Point3D(y[0],y[1],y[2]); 
             double maxDoca = Double.POSITIVE_INFINITY;
             
-            for(Line3D l : polylines) { 
-                if(l.distance(dcaCand).length()<maxDoca) {
-                    maxDoca=l.distance(dcaCand).length();
+            for(Line3D l : polylines) {
+                double doca = l.distance(dcaCand).length();
+                if (doca < maxDoca) {
+                    maxDoca = doca;
                 } 
             }
-            if(maxDoca<_doca) {
+            if (maxDoca < _doca) {
                 _doca = maxDoca; 
                 return false;
             }

From 927223b09d6387e711c5d612cfef12968f54e420 Mon Sep 17 00:00:00 2001
From: Nathan Baltzell <baltzell@jlab.org>
Date: Mon, 4 May 2026 17:08:25 -0400
Subject: [PATCH 2/2] avoid iterator

---
 .../src/main/java/org/jlab/clas/swimtools/Swim.java       | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java b/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java
index 2ee324a70e..e83c49fd66 100644
--- a/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java
+++ b/common-tools/swim-tools/src/main/java/org/jlab/clas/swimtools/Swim.java
@@ -1361,12 +1361,11 @@ public DCASwimStopper(SwimTrajectory swimTraj) {
         
         @Override
         public boolean stopIntegration(double t, double[] y) {
-           
             Point3D dcaCand = new Point3D(y[0],y[1],y[2]); 
             double maxDoca = Double.POSITIVE_INFINITY;
-            
-            for(Line3D l : polylines) {
-                double doca = l.distance(dcaCand).length();
+            int nlines = polylines.size();
+            for(int i=0; i<nlines; i++) {
+                double doca = polylines.get(i).distance(dcaCand).length();
                 if (doca < maxDoca) {
                     maxDoca = doca;
                 } 
@@ -1376,7 +1375,6 @@ public boolean stopIntegration(double t, double[] y) {
                 return false;
             }
             return true;
-            
         }
 
         /**