Simple Java Stream Benchmark
This application is a small benchmark of the Java stream API.
Download or clone the repository and navigate into the
$ git clone https://github.com/graalvm/graalvm-demos $ cd graalvm-demos/java-simple-stream-benchmark
Build the benchmark. You can manually execute
mvn package, but there is also
build.sh script included for your convenience.
Now you are all set to execute the benchmark and compare the results between different JVMs.
Export the GraalVM home directory as the
$GRAALVM_HOME and add
to the path, using a command-line shell for Linux:
$ export GRAALVM_HOME=/path/to/graalvm
and for macOS:
$ export GRAALVM_HOME=/path/to/graalvm/Contents/Home
Running the Benchmark #
To run the benchmark, you need to execute the
You can run it with the following command:
$ $GRAALVM_HOME/bin/java -jar target/benchmarks.jar
If you would like to run the benchmark on a different JVM, you can run it with
java you have. However, if you just want to run it on the same JVM,
but without the GraalVM compiler, you may add the
into the same command.
$ $GRAALVM_HOME/bin/java -XX:-UseJVMCICompiler -jar target/benchmarks.jar
This way, the GraalVM compiler will not be used as the JVMCI compiler and the JVM will use its default one.
Note about Results #
The benchmark mode is
AverageTime in nanoseconds per operation,
which means lower numbers are better.
Note that the results you see can be influenced by the hardware you are running this benchmark on, the CPU load, and other factors. Interpret them responsibly.