From 1ac7e203216efaf31147ae4820f086145836470f Mon Sep 17 00:00:00 2001
From: Nguyen Nam Thai <namthainguyen@gmail.com>
Date: Sat, 18 Jul 2020 21:56:20 +0700
Subject: [PATCH 1/2] BAEL-4113 Measure exception performance

---
 .../java/com/baeldung/ExceptionBenchmark.java | 69 +++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 jmh/src/main/java/com/baeldung/ExceptionBenchmark.java

diff --git a/jmh/src/main/java/com/baeldung/ExceptionBenchmark.java b/jmh/src/main/java/com/baeldung/ExceptionBenchmark.java
new file mode 100644
index 0000000000..9a166fe2ce
--- /dev/null
+++ b/jmh/src/main/java/com/baeldung/ExceptionBenchmark.java
@@ -0,0 +1,69 @@
+package com.baeldung;
+
+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());
+            }
+        }
+    }
+}

From 76b1717953685a4dfb72153084b4f5645527a015 Mon Sep 17 00:00:00 2001
From: Nguyen Nam Thai <namthainguyen@gmail.com>
Date: Sun, 19 Jul 2020 22:07:57 +0700
Subject: [PATCH 2/2] BAEL-4113 Relocate the ExceptionBenchmark class

---
 performance-tests/pom.xml                           | 13 +++++++++++++
 .../exception}/ExceptionBenchmark.java              |  2 +-
 2 files changed, 14 insertions(+), 1 deletion(-)
 rename {jmh/src/main/java/com/baeldung => performance-tests/src/main/java/com/baeldung/performancetests/exception}/ExceptionBenchmark.java (97%)

diff --git a/performance-tests/pom.xml b/performance-tests/pom.xml
index 0dc38e56a4..c790dbbb16 100644
--- a/performance-tests/pom.xml
+++ b/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.
diff --git a/jmh/src/main/java/com/baeldung/ExceptionBenchmark.java b/performance-tests/src/main/java/com/baeldung/performancetests/exception/ExceptionBenchmark.java
similarity index 97%
rename from jmh/src/main/java/com/baeldung/ExceptionBenchmark.java
rename to performance-tests/src/main/java/com/baeldung/performancetests/exception/ExceptionBenchmark.java
index 9a166fe2ce..09965e9130 100644
--- a/jmh/src/main/java/com/baeldung/ExceptionBenchmark.java
+++ b/performance-tests/src/main/java/com/baeldung/performancetests/exception/ExceptionBenchmark.java
@@ -1,4 +1,4 @@
-package com.baeldung;
+package com.baeldung.performancetests.exception;
 
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;