feat: 性能测试

Author: BestBurning

java-11/.java-version

@@ -0,0 +1 @@
+11.0

java-11/pom.xml

@@ -23,4 +23,4 @@
             </plugin>
         </plugins>
     </build>
-</project>
+</project>

java-17/.java-version

@@ -0,0 +1 @@
+17.0

java-17/pom.xml

@@ -13,6 +13,8 @@
         <maven.compiler.target>17</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
+
+
     <build>
         <plugins>
             <plugin>

java-18/.java-version

@@ -0,0 +1 @@
+18.0

java-19/.java-version

@@ -0,0 +1 @@
+19.0

java-19/pom.xml

@@ -17,35 +17,17 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
-    <dependencies>
-        <!-- https://mvnrepository.com/artifact/org.openjdk.jmh/jmh-core -->
-        <dependency>
-            <groupId>org.openjdk.jmh</groupId>
-            <artifactId>jmh-core</artifactId>
-            <version>1.36</version>
-        </dependency>
-        <dependency>
-            <groupId>org.openjdk.jmh</groupId>
-            <artifactId>jmh-generator-annprocess</artifactId>
-            <version>1.36</version>
-            <scope>provided</scope>
-        </dependency>
-    </dependencies>
 
 
     <build>
         <plugins>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.10.1</version>
                 <configuration>
                     <source>19</source>
                     <target>19</target>
-                    <compilerArgs>
-                        <arg>--enable-preview</arg>
-                        <!--                        <arg>&#45;&#45;add-exports=java.base/jdk.incubator.concurrent=ALL-UNNAMED</arg>-->
-                    </compilerArgs>
+                    <compilerArgs>--enable-preview</compilerArgs>
                 </configuration>
             </plugin>
         </plugins>

java-19/src/main/java/com/di1shuai/java19/performance/Performance19.java

@@ -0,0 +1 @@
+1.8

java-8/.java-version

@@ -17,6 +17,17 @@
             <version>1.18.10</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-core</artifactId>
+            <version>1.36</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjdk.jmh</groupId>
+            <artifactId>jmh-generator-annprocess</artifactId>
+            <version>1.36</version>
+            <scope>provided</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -34,4 +45,4 @@
     </build>
 
 
-</project>
+</project>

java-8/pom.xml

@@ -0,0 +1,34 @@
+package com.diyishuai.java8.performance;
+
+import org.openjdk.jmh.annotations.*;
+import org.openjdk.jmh.results.format.ResultFormatType;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * @author shea
+ * @since 2022/11/24
+ */
+@BenchmarkMode(Mode.Throughput)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@State(Scope.Thread)
+@Warmup(iterations = 10, time = 1, timeUnit = TimeUnit.MILLISECONDS)
+@Measurement(iterations = 10, time = 1, timeUnit = TimeUnit.MILLISECONDS)
+@Fork(2)
+@Threads(2)
+public class Performance {
+
+    @Benchmark
+    public long div() {
+        long t = 455565655225562L;
+        long a = 0;
+        for (int i = 0; i < 1000; i++) {
+            a = t / 1024 / 1024 / 1024;
+        }
+        return a;
+    }
+
+}