Add JavaInteropSpeedBench.

[zapster]

JMH micro benchmark derived from JavaInteropSpeedTest (cf #112).

Run this from graal-core:

mx microbench -- com.oracle.truffle.api.interop.java.bench.JavaInteropSpeedBench

Note that this is the truffle alternative to graalvm/graal-core#126. I'm fine with versions.

/cc @woess

[zapster]

Wow, both alternatives (#126 and graalvm/graal-core#126) have the same PR number.

[woess]

I'm ok with both alternatives. Leaving the decision to @jtulach.

[chumer]

I'd prefer having it in Truffle instead of Graal. I also want to add some DSL interpreter benchmarks.

[zapster]

@chumer Note that currently the mx microbench command is part of graal-core. We would need to move it if you want to use it in truffle without graal.

[woess]

I guess we can remove JavaInteropSpeedTest now, too.

[zapster]

Closing as graalvm/graal-core#126 has been merged.

[jtulach]

I've merged graalvm/graal-core#126 as it is smaller change - the jmh infrastructure is already there. On the other hand, I would still like to have jmh in Truffle. We need benchmarks and having them in two repositories isn't comfortable - which is the most likely reason why we had just the one "speed" test.