lschuetze / dynvoke-jmh-benchmark

:coffee: Invokedynamic and friends benchmarks

JVM dynamic invocation benchmark

This is a work-in-progress set of tests to compare the runtime overhead of different dynamic invocation and lookup primitives on the JVM, such as:

• Class.getMethod()
• Lookup.findStatic() and Lookup.findVirtual()(java.lang.invoke)
• Method.invoke() (java.lang.reflect)
• MethodHandle.invoke() (java.lang.invoke)
• invokedynamic

This benchmark wouldn't be possible without two great tools:

• The Java Microbenchmarking Harness is used in order to get reliable results and to avoid some common benchmarking pitfalls on the HotSpot JVM.
• JiteScript is used to dynamically generate code leveraging the invokedynamic instruction (which would otherwise not be possible with pure Java).

Other sources of inspiration include:

• https://github.com/golo-lang/golo-jmh-benchmarks
• https://github.com/shipilev/article-method-dispatch

Results

See the results of benchmark runs on my machine.

Build

./mvnw clean package

Run

./run_benchmarks.sh ...

or

java -jar target/benchmarks.jar ...