Use JMH for benchmarks

[vlsi]

I would be great to use https://github.com/openjdk/jmh for benchmarks for better reproducibility of the results.

[vlsi]

Looks like JMH-based benchmarks locate in a different repository: https://github.com/coderodde/IndexedLinkedListBenchmark
WDYT of merging the benchmarks to the current repo?