AdoptOpenJDK/jitwatch

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.

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Step 1. Add the JitPack repository to your build file

Add it in your root settings.gradle at the end of repositories:

	dependencyResolutionManagement {
		repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
		repositories {
			mavenCentral()
			maven { url 'https://jitpack.io' }
		}
	}

Add it in your settings.gradle.kts at the end of repositories:

	dependencyResolutionManagement {
		repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
		repositories {
			mavenCentral()
			maven { url = uri("https://jitpack.io") }
		}
	}

Add to pom.xml

	<repositories>
		<repository>
		    <id>jitpack.io</id>
		    <url>https://jitpack.io</url>
		</repository>
	</repositories>

Add it in your build.sbt at the end of resolvers:

 
    resolvers += "jitpack" at "https://jitpack.io"

Add it in your project.clj at the end of repositories:

 
    :repositories [["jitpack" "https://jitpack.io"]]

Step 2. Add the dependency

	dependencies {
		implementation 'com.github.AdoptOpenJDK:jitwatch:1.5.0'
	}

	dependencies {
		implementation("com.github.AdoptOpenJDK:jitwatch:1.5.0")
	}

	<dependency>
	    <groupId>com.github.AdoptOpenJDK</groupId>
	    <artifactId>jitwatch</artifactId>
	    <version>1.5.0</version>
	</dependency>


                            
    libraryDependencies += "com.github.AdoptOpenJDK" % "jitwatch" % "1.5.0"


                            
    :dependencies [[com.github.AdoptOpenJDK/jitwatch "1.5.0"]]

Readme

JITWatch

Log analyser and visualiser for the HotSpot JIT compiler.

Video introduction to JITWatch video
Slides from my LJC lightning talk on JITWatch slides

<h3>For instructions and screenshots see the wiki</h3> <h3>https://github.com/AdoptOpenJDK/jitwatch/wiki</h3>

The JITWatch user interface is built using JavaFX which is downloaded as a maven dependency for JDK11+.

For pre-JDK11 you will need to use a Java runtime that includes JavaFX.

<h2>maven</h2> <pre>mvn clean package && java -jar ui/target/jitwatch-ui-shaded.jar</pre> <h2>Build an example HotSpot log</h2> <pre># Build the code and then run cd scripts && ./makeDemoLogFile.sh</pre>