Foreign + Vectors - benchmarks for copying and swapping

[Radosław Smogura]

Hi all,

I could not stop my self, from this simple experiment of glueing together foreign with vectors, at least via byte buffers for now.

Results are not the best, but still could be interesting, as there was some interest with this.

Below please find results, and the link to benchmark:

Benchmark                                 Mode  Cnt   Score   Error  Units
VectorCopySegments.copyWithNative         avgt   10  20.987 ? 1.819  ns/op
VectorCopySegments.copyWithNativeShared   avgt   10  12.528 ? 0.183  ns/op
VectorCopySegments.copyWithNativeToArray  avgt   10  19.800 ? 3.985  ns/op
VectorCopySegments.copyWithVector         avgt   10  31.151 ? 1.929  ns/op
VectorCopySegments.copyWithVectorShared   avgt   10  56.752 ? 1.754  ns/op
VectorCopySegments.copyWithVectorShuffle  avgt   10  52.409 ? 0.390  ns/op
VectorCopySegments.copyWithVectorToArray  avgt   10  29.573 ? 0.485  ns/op

https://github.com/rsmogura/panama-foreign/blob/foreign_and_vectors/test/micro/org/openjdk/bench/jdk/incubator/foreign/VectorCopySegments.java

Feedback is welcome.

Kind regards,
Rado