From bb02fad3e3663062e563c29302375279fcd0cb45 Mon Sep 17 00:00:00 2001
From: Gilles Sadowski <gilleseran@gmail.com>
Date: Wed, 28 Oct 2020 03:21:33 +0100
Subject: [PATCH] Avoid redundant computations.

---
 src/main/java/org/apache/commons/math4/util/MathArrays.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/org/apache/commons/math4/util/MathArrays.java b/src/main/java/org/apache/commons/math4/util/MathArrays.java
index a7488e239..864dbcf4f 100644
--- a/src/main/java/org/apache/commons/math4/util/MathArrays.java
+++ b/src/main/java/org/apache/commons/math4/util/MathArrays.java
@@ -912,11 +912,12 @@ public class MathArrays {
         if (sum == 0) {
             throw new MathArithmeticException(LocalizedFormats.ARRAY_SUMS_TO_ZERO);
         }
+        final double scale = normalizedSum / sum;
         for (int i = 0; i < len; i++) {
             if (Double.isNaN(values[i])) {
                 out[i] = Double.NaN;
             } else {
-                out[i] = values[i] * normalizedSum / sum;
+                out[i] = values[i] * scale;
             }
         }
         return out;