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rJava package and built-in Java interoperability in FastR

This benchmark demonstrates the difference between the performance of rJava on GNU-R, rJava on FastR and builtin Java interoperability in FastR.

Note FastR provides custom patched version of rJava where the C code that handles the communication with JVM is replaced by R code that uses the builtin Java interoperability to achieve the same.

Setup

Follow the instructions from the top level README to install and setup GraalVM. Install the patched version of rJava using:

git clone https://github.com/oracle/fastr.git /tmp/fastr-repo
$GRAALVM_DIR/bin/R CMD INSTALL /tmp/fastr-repo/com.oracle.truffle.r.pkgs/rJava

Note: the example invokes Java compiler using system2 builtin. For this to work you need to export variable JAVA_HOME pointing to Java installation. This is done automatically on GraalVM, but not if run these examples on GNU-R.

Run

Execute either r_java_bench.R or fastr_interop_bench.R using Rscript, for example:

$GRAALVM_DIR/bin/Rscript --jvm r_java_bench.R