Here are benchmarking results for «Replacing HashMap with Off-Heap HashMap in Java?» blog post.
The performance tests are performed via JMH. The configuration of a hardware is Intel® Core™ i7-1165G7 @ 2.80GHz × 8 (4 core + 4 HT) with 16 GB RAM. Scala version: 2.13.6.
avg - average, p0 - percentile 0 (min), p50 - percentile 50 (median), p95 - percentile 95, p99 - percentile 99, p100 - percentile 100 (max)
Performance of the successful lookup (hit) for all JDKs:
Performance of the failed lookup (miss) for all JDKs: