Lightning Fast Java

Performance Tests to show Mechanical Sympathy principles in Java

To run the IO tests, run the main in TestSequentialIoPerformance.java. All other tests use the JMH framework.

To build the JMH tests:

1. Make sure you have Java and Maven installed.
2. Clone the repo
3. cd into the directory
4. Run mvn clean install

JMH Benchmarks

JMH runs benchmarks over and over again to get good statistical sample. If you are in a hurry, you may lower the number of Forks to 1. The different options for running JMH benchmarks can be found here. Otherwise, I recommend running them over night.

To run the Array Vs LinkedList benchmark run:

java -jar target/benchmarks.jar net.askren.mechanicalsympathy.jmh.ArrayVsLinkedList

To run the Memory Access Patterns test:

java -jar target/benchmarks.jar net.askren.mechanicalsympathy.jmh.TestMemoryAccessPatterns

Non JMH Benchmarks

To run the SequentialIOPerformance Benchmark run:

Run java -cp target/java-performance-0.0.1-SNAPSHOT.jar net.askren.mechanicalsympathy.TestSequentialIoPerformance