✅ Adding tests.

crossoverJie · crossoverJie · commit 4875950a5c28 · 2019-07-04T00:38:53.000+08:00
diff --git a/pom.xml b/pom.xml
@@ -131,6 +131,20 @@
             </exclusions>
         </dependency>
 
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>1.9.3</version>
+        </dependency>
+
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>1.9.3</version>
+        </dependency>
+
+
+
 
     </dependencies>
 
diff --git a/src/main/java/com/crossoverjie/basic/CollectionsTest.java b/src/main/java/com/crossoverjie/basic/CollectionsTest.java
@@ -0,0 +1,74 @@
+package com.crossoverjie.basic;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.ArrayList;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Function:
+ *
+ * @author crossoverJie
+ * Date: 2019-06-27 00:11
+ * @since JDK 1.8
+ */
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+public class CollectionsTest {
+
+    private static final int TEN_MILLION = 10000000;
+
+    @Benchmark
+    @BenchmarkMode(Mode.AverageTime)
+    @OutputTimeUnit(TimeUnit.MICROSECONDS)
+    public void arrayList() {
+
+        List<String> array = new ArrayList<>();
+
+        for (int i = 0; i < TEN_MILLION; i++) {
+            array.add("123");
+        }
+
+    }
+
+    @Benchmark
+    @BenchmarkMode(Mode.AverageTime)
+    @OutputTimeUnit(TimeUnit.MICROSECONDS)
+    public void arrayListSize() {
+        List<String> array = new ArrayList<>(TEN_MILLION);
+
+        for (int i = 0; i < TEN_MILLION; i++) {
+            array.add("123");
+        }
+
+    }
+
+    @Benchmark
+    @BenchmarkMode(Mode.AverageTime)
+    @OutputTimeUnit(TimeUnit.MICROSECONDS)
+    public void linkedList() {
+        List<String> array = new LinkedList<>();
+
+        for (int i = 0; i < TEN_MILLION; i++) {
+            array.add("123");
+        }
+
+    }
+
+
+    public static void main(String[] args) throws RunnerException {
+        Options opt = new OptionsBuilder()
+                .include(CollectionsTest.class.getSimpleName())
+                .forks(1)
+                .build();
+
+
+        new Runner(opt).run();
+    }
+}
