From 26f45b62a5aed774e5a71eace94a30bc39c88b80 Mon Sep 17 00:00:00 2001
From: Arturo Bernal <arturobernalg@gmail.com>
Date: Tue, 13 Apr 2021 06:54:59 +0200
Subject: [PATCH] MATH-1571 - Collections Performance

---
 .../java/org/apache/commons/math4/ml/neuralnet/Network.java    | 3 +--
 .../org/apache/commons/math4/optim/linear/SimplexTableau.java  | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/main/java/org/apache/commons/math4/ml/neuralnet/Network.java b/src/main/java/org/apache/commons/math4/ml/neuralnet/Network.java
index 040963b98f..f5dfbd274d 100644
--- a/src/main/java/org/apache/commons/math4/ml/neuralnet/Network.java
+++ b/src/main/java/org/apache/commons/math4/ml/neuralnet/Network.java
@@ -179,8 +179,7 @@ public Iterator<Neuron> iterator() {
      * @see NeuronIdentifierComparator
      */
     public Collection<Neuron> getNeurons(Comparator<Neuron> comparator) {
-        final List<Neuron> neurons = new ArrayList<>();
-        neurons.addAll(neuronMap.values());
+        final List<Neuron> neurons = new ArrayList<>(neuronMap.values());
 
         Collections.sort(neurons, comparator);
 
diff --git a/src/main/java/org/apache/commons/math4/optim/linear/SimplexTableau.java b/src/main/java/org/apache/commons/math4/optim/linear/SimplexTableau.java
index e7576791d9..c306cfcc82 100644
--- a/src/main/java/org/apache/commons/math4/optim/linear/SimplexTableau.java
+++ b/src/main/java/org/apache/commons/math4/optim/linear/SimplexTableau.java
@@ -603,7 +603,7 @@ protected void dropPhase1Objective() {
         }
 
         // remove the columns in reverse order so the indices are correct
-        Integer[] drop = columnsToDrop.toArray(new Integer[columnsToDrop.size()]);
+        Integer[] drop = columnsToDrop.toArray(new Integer[0]);
         for (int i = drop.length - 1; i >= 0; i--) {
             columnLabels.remove((int) drop[i]);
         }