Merge pull request #9724 from nguyennamthai/BAEL-4113

BAEL-4113 Measure exception performance

performance-tests/pom.xml

@@ -120,6 +120,18 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>${maven-jar-plugin.version}</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>com.baeldung.performancetests.MappingFrameworksPerformance</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
         </plugins>
         <pluginManagement>
             <plugins>
@@ -178,6 +190,7 @@
         <jmh-core.version>1.21</jmh-core.version>
         <jmh-generator.version>1.21</jmh-generator.version>
         <maven-compiler-plugin.version>3.7.0</maven-compiler-plugin.version>
+        <maven-jar-plugin.version>3.2.0</maven-jar-plugin.version>
 
         <!--
             Java source/target to use for compilation.

performance-tests/src/main/java/com/baeldung/performancetests/exception/ExceptionBenchmark.java

@@ -0,0 +1,69 @@
+package com.baeldung.performancetests.exception;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.concurrent.TimeUnit;
+
+@Fork(1)
+@Warmup(iterations = 2)
+@Measurement(iterations = 10)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+public class ExceptionBenchmark {
+    private static final int LIMIT = 10_000;
+
+    @Benchmark
+    public void doNotThrowException(Blackhole blackhole) {
+        for (int i = 0; i < LIMIT; i++) {
+            blackhole.consume(new Object());
+        }
+    }
+
+    @Benchmark
+    public void throwAndCatchException(Blackhole blackhole) {
+        for (int i = 0; i < LIMIT; i++) {
+            try {
+                throw new Exception();
+            } catch (Exception e) {
+                blackhole.consume(e);
+            }
+        }
+    }
+
+    @Benchmark
+    public void createExceptionWithoutThrowingIt(Blackhole blackhole) {
+        for (int i = 0; i < LIMIT; i++) {
+            blackhole.consume(new Exception());
+        }
+    }
+
+    @Benchmark
+    @Fork(value = 1, jvmArgs = "-XX:-StackTraceInThrowable")
+    public void throwExceptionWithoutAddingStackTrace(Blackhole blackhole) {
+        for (int i = 0; i < LIMIT; i++) {
+            try {
+                throw new Exception();
+            } catch (Exception e) {
+                blackhole.consume(e);
+            }
+        }
+    }
+
+    @Benchmark
+    public void throwExceptionAndUnwindStackTrace(Blackhole blackhole) {
+        for (int i = 0; i < LIMIT; i++) {
+            try {
+                throw new Exception();
+            } catch (Exception e) {
+                blackhole.consume(e.getStackTrace());
+            }
+        }
+    }
+}