jfrtofp

JFR to Firefox Profiler converter for JDK 11+.

This is in alpha state, it does not work with really large JFR files and might still have bugs.

It works best with this custom Firefox Profiler fork which includes many of our own PRs which are not yet upstream (and might be less stable).

Basic Usage

We recommend using the jfrtofp-server which includes a custom Firefox Profiler distribution with the converter and a webserver which serves both.

If you really want to use it directly, download the latest jfrtofp-all.jar release and simply pass the JFR file as its first argument:

  java -jar jfrtofp-all.jar samples/small_profile.jfr

This will produce a samples/small_profile.json.gz file, you can customize the output file by passing the --output <file> option.

There is the possibility to produce Speedscope files as well, by passing the "--mode speedscope" option:

  java -jar jfrtofp-all.jar samples/small_profile.jfr --mode speedscope

This will produce a samples/small_profile.json.gz file. But this is considered experimental and not the main focus of this project.

Run from Source

  git clone https://github.com/parttimenerd/jfrtofp.git
  cd jfrtofp
  ./gradlew run --args="samples/small_profile.jfr"

Usage as a Library

dependencies {
    implementation 'com.github.parttimenerd:jfrtofp:0.0.4-SNAPSHOT'
}

repositories {
    maven {
        url = "https://s01.oss.sonatype.org/content/repositories/snapshots/"
    }
}

License

MIT, Copyright 2023 SAP SE or an SAP affiliate company, Johannes Bechberger and jfrtofp contributors

This project is a prototype of the SapMachine team at SAP SE