Index: ta4j-core/src/test/java/eu/damir/AnotherMockTimeSeries.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- ta4j-core/src/test/java/eu/damir/AnotherMockTimeSeries.java	(revision )
+++ ta4j-core/src/test/java/eu/damir/AnotherMockTimeSeries.java	(revision )
@@ -0,0 +1,95 @@
+/**
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2017 Marc de Verdelhan & respective authors (see AUTHORS)
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+package eu.damir;
+
+import org.ta4j.core.BaseTimeSeries;
+import org.ta4j.core.Tick;
+import org.ta4j.core.mocks.MockTick;
+
+import java.time.ZonedDateTime;
+import java.time.temporal.ChronoField;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A time series with sample data.
+ */
+public class AnotherMockTimeSeries extends BaseTimeSeries {
+
+    public AnotherMockTimeSeries(double... data) {
+        super(doublesToTicks(data));
+    }
+
+    public AnotherMockTimeSeries(List<Tick> ticks) {
+        super(ticks);
+    }
+
+    public AnotherMockTimeSeries(double[] data, ZonedDateTime[] times) {
+        super(doublesAndTimesToTicks(data, times));
+    }
+
+    public AnotherMockTimeSeries(ZonedDateTime... dates) {
+        super(timesToTicks(dates));
+    }
+
+    public AnotherMockTimeSeries() {
+        super(arbitraryTicks());
+    }
+
+    private static List<Tick> doublesToTicks(double... data) {
+        ArrayList<Tick> ticks = new ArrayList<>();
+        for (int i = 0; i < data.length; i++) {
+            ticks.add(new MockTick(data[i]));
+            //ticks.add(new MockTick(ZonedDateTime.now().with(ChronoField.MILLI_OF_SECOND, i), data[i]));
+        }
+        return ticks;
+    }
+
+    private static List<Tick> doublesAndTimesToTicks(double[] data, ZonedDateTime[] times) {
+        if (data.length != times.length) {
+            throw new IllegalArgumentException();
+        }
+        ArrayList<Tick> ticks = new ArrayList<>();
+        for (int i = 0; i < data.length; i++) {
+            ticks.add(new MockTick(times[i], data[i]));
+        }
+        return ticks;
+    }
+
+    private static List<Tick> timesToTicks(ZonedDateTime... dates) {
+        ArrayList<Tick> ticks = new ArrayList<>();
+        int i = 1;
+        for (ZonedDateTime date : dates) {
+            ticks.add(new MockTick(date, i++));
+        }
+        return ticks;
+    }
+
+    private static List<Tick> arbitraryTicks() {
+        ArrayList<Tick> ticks = new ArrayList<>();
+        for (double i = 0d; i < 5000; i++) {
+            ticks.add(new MockTick(ZonedDateTime.now(), i, i + 1, i + 2, i + 3, i + 4, i + 5, (int) (i + 6)));
+        }
+        return ticks;
+    }
+}
Index: ta4j-core/src/test/java/eu/damir/SMAPerformanceTest.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- ta4j-core/src/test/java/eu/damir/SMAPerformanceTest.java	(revision )
+++ ta4j-core/src/test/java/eu/damir/SMAPerformanceTest.java	(revision )
@@ -0,0 +1,77 @@
+package eu.damir;
+
+import org.junit.Test;
+import org.ta4j.core.Decimal;
+import org.ta4j.core.TimeSeries;
+import org.ta4j.core.indicators.SMAIndicator;
+import org.ta4j.core.indicators.helpers.ClosePriceIndicator;
+
+public class SMAPerformanceTest {
+
+
+    //on mmy macbook pro mid 2014:
+    //average = 5
+    //Time elapsed: 22072
+    @Test
+    public void testIfQuickEnoughOneIteration() {
+        long start = System.currentTimeMillis();
+        int initialCapacity = 54 * 5 * 24 * 60 * 3;
+
+        double[] input = new double[initialCapacity];
+        for (int i = 0; i < input.length; i++) {
+            input[i] = 5d;
+        }
+
+        // just adding close price instead timestamp with close price:
+        //   AnotherMockTimeSeries: ticks.add(new MockTick(data[i]));
+        //MockTimeSeries: ticks.add(new MockTick(ZonedDateTime.now().with(ChronoField.MILLI_OF_SECOND, i), data[i]));
+
+        TimeSeries timeSeries = new AnotherMockTimeSeries(input);
+
+        Decimal average = null;
+        for (int h = 2; h < 3; h++) {
+            SMAIndicator quoteSMA = new SMAIndicator(new ClosePriceIndicator(timeSeries), h);
+            for (int i = 0; i < timeSeries.getTickCount(); i++) {
+                average = quoteSMA.getValue(i);
+            }
+        }
+        long end = System.currentTimeMillis();
+        System.out.println("average = " + average);
+
+        System.out.println("Time elapsed: " + (end - start));
+    }
+
+
+    //on mmy macbook pro mid 2014:
+    //average = ...
+    //Time elapsed: infinity... ~50 min
+    @Test
+    public void testIfQuickEnoughFullIteration() {
+        long start = System.currentTimeMillis();
+        int initialCapacity = 54 * 5 * 24 * 60 * 3;
+
+        double[] input = new double[initialCapacity];
+        for (int i = 0; i < input.length; i++) {
+            input[i] = 5d;
+        }
+
+        // just adding close price instead timestamp with close price:
+        //   AnotherMockTimeSeries: ticks.add(new MockTick(data[i]));
+        //MockTimeSeries: ticks.add(new MockTick(ZonedDateTime.now().with(ChronoField.MILLI_OF_SECOND, i), data[i]));
+
+
+        TimeSeries timeSeries = new AnotherMockTimeSeries(input);
+
+        Decimal average = null;
+        for (int h = 2; h < 201; h++) {
+            SMAIndicator quoteSMA = new SMAIndicator(new ClosePriceIndicator(timeSeries), h);
+            for (int i = 0; i < timeSeries.getTickCount(); i++) {
+                average = quoteSMA.getValue(i);
+            }
+        }
+        long end = System.currentTimeMillis();
+        System.out.println("average = " + average);
+
+        System.out.println("Time elapsed: " + (end - start));
+    }
+}
Index: ta4j-core/pom.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- ta4j-core/pom.xml	(revision 121468ca1db0124017b1669c528709eea2a69234)
+++ ta4j-core/pom.xml	(revision )
@@ -18,6 +18,11 @@
             <artifactId>slf4j-api</artifactId>
             <version>1.7.25</version>
         </dependency>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-log4j12</artifactId>
+            <version>1.7.25</version>
+        </dependency>
 
         <!-- Test dependencies -->
         <dependency>
@@ -32,5 +37,6 @@
             <version>3.6.1</version>
             <scope>test</scope>
         </dependency>
+
     </dependencies>
 </project>