Performance comparison of a multitude of thread/fiber implementations for JVM.
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This project bundles a set of benchmarks that aims to measure the performance of a multitude of threading implementations in the Java Virtual Machine.


As of now, there is just a single benchmark (ring) adopted from the Performance Measurements of Threads in Java and Processes in Erlang article. I plan to introduce new benchmarks as time allows. That being said, contributions are welcome.


Project employs 3 threading libraries to implement fibers in the benchmarks.

  1. Standard Java Threads
  2. Akka Actors
  3. Quasar Fibers and Actors


You first need to build the JMH Uber JAR using Maven.

$ mvn clean install

Next, you can either use the provided script

$ ./ --help
Available parameters (with defaults):
    workerCount (503)
    ringSize    (1000000)
    cpuList     (0-1)

# You can run with default parameters.
$ ./

# Alternatively, you can configure parameters through environment variables.
$ ringSize=500 workerCount=30 cpuList=0-7 ./

or call JMH manually:

$ java \
> -jar target/fiber-test.jar \
> -jvmArgsAppend "-DworkerCount=503 -DringSize=1000000 -javaagent:/path/to/quasar-core-<version>.jar" \
> -wi 5 -i 10 -bm avgt -tu ms -f 5 \
> ".*RingBenchmark.*"

Instead of using JMH, you can additionally use assembly:single goal to create an all-in-one JAR and run benchmarks individually.

$ mvn assembly:single
$ java \
> -server -XX:+TieredCompilation -XX:+AggressiveOpts \
> -DworkerCount=503 -DringSize=10000000 \
> -javaagent:/path/to/quasar-core-<version>.jar \
> -cp target/fiber-test-<version>-jar-with-dependencies.jar \
> com.github.vy.fibertest.QuasarFiberRingBenchmark


For Oracle Java 1.8.0_60-b27 running on Intel(R) Core(TM) i7-4702MQ CPU @ 2.20GHz on Linux 3.13.0-63-generic x86_64 kernel:

JavaThreadRingBenchmark.ringBenchmark      avgt   50  7741,274 ± 476,113  ms/op
QuasarActorRingBenchmark.ringBenchmark     avgt   50  1702,764 ±  65,940  ms/op
QuasarDataflowRingBenchmark.ringBenchmark  avgt   50  1512,901 ±  55,922  ms/op
QuasarChannelRingBenchmark.ringBenchmark   avgt   50  1417,803 ±  49,837  ms/op
AkkaActorRingBenchmark.ringBenchmark       avgt   50   892,533 ±  50,865  ms/op
QuasarFiberRingBenchmark.ringBenchmark     avgt   50   832,529 ±  47,586  ms/op


The fiber-test by Volkan Yazıcı is licensed under the Creative Commons Attribution 4.0 International License.

Creative Commons Attribution 4.0 International License