--- src/components/org/apache/jmeter/visualizers/Spline3.java	(revision 1044207)
+++ src/components/org/apache/jmeter/visualizers/Spline3.java	(working copy)
@@ -224,10 +224,8 @@ 
         }
         // main iteration
         while ((this.precision(oldX, newX) > this._minPrecision) && (iterations < this._maxIterations)) {
+            System.arraycopy(oldX, 0, newX, 0, _n);
             for (i = 0; i < _n; i++) {
-                oldX[i] = newX[i];
-            }
-            for (i = 0; i < _n; i++) {
                 newX[i] = _B[i];
                 for (j = 0; j < i; j++) {
                     newX[i] = newX[i] - (_A[i][j] * oldX[j]);
@@ -254,9 +252,7 @@ 
                 log.debug(", divergence is possible");
             }
         }
-        for (i = 0; i < _n; i++) {
-            _rS[i + 1] = newX[i];
-        }
+        System.arraycopy(newX, 0, _rs, 1, _n);
     }
 
     /**