Here are benchmarking results for «Map Performance: Java vs Scala» 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.
avg - average, min - minimal, p50 - percentile 50 (median), p95 - percentile 95, p99 - percentile 99, max - maximum
Benchmarks for java.util.HashMap vs Map.asJava vs immutable.Map vs mutable.Map.
Comparing performance of Map between scala 2.12 and 2.13, using openjdk-17.
Comparing performance of Map for different versions of JDK: openjdk-8 vs openjdk-11 vs openjdk-17. Use switcher above to change scala version.
Same benchmark but for Set. Notice that HashSet internally uses HashMap, so the performance, supposedly, should be the same.
Comparing performance of Set between scala 2.12 and 2.13, using openjdk-17.
Comparing performance of Set for different versions of JDK: openjdk-8 vs openjdk-11 vs openjdk-17. Use switcher above to change scala version.
Full JMH logs:openjdk-8 (scala 2.12), openjdk-11 (scala 2.12), openjdk-17 (scala 2.12), openjdk-8 (scala 2.13), openjdk-11 (scala 2.13), openjdk-17 (scala 2.13).