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Diffstat (limited to 'test/benchmarks/src/main/scala/scala/collection/immutable/SetBenchmark.scala')
-rw-r--r-- | test/benchmarks/src/main/scala/scala/collection/immutable/SetBenchmark.scala | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/benchmarks/src/main/scala/scala/collection/immutable/SetBenchmark.scala b/test/benchmarks/src/main/scala/scala/collection/immutable/SetBenchmark.scala new file mode 100644 index 0000000000..9330626691 --- /dev/null +++ b/test/benchmarks/src/main/scala/scala/collection/immutable/SetBenchmark.scala @@ -0,0 +1,29 @@ +package scala.collection.immutable + +import java.util.concurrent.TimeUnit + +import org.openjdk.jmh.annotations._ +import org.openjdk.jmh.infra._ + +@BenchmarkMode(Array(Mode.AverageTime)) +@Fork(2) +@Threads(1) +@Warmup(iterations = 10) +@Measurement(iterations = 10) +@OutputTimeUnit(TimeUnit.NANOSECONDS) +@State(Scope.Benchmark) +class SetBenchmark { + + var base: Set[String] = _ + + + @Setup(Level.Trial) def initKeys(): Unit = { + base = Set("a", "b", "c", "d") + } + + // immutable map is implemented as EmptySet -> Set1 -> Set2 -> Set3 -> Set4 -> HashSet + // add an extra entry to Set4 causes a lot of work, benchmark the transition + @Benchmark def set4AddElement(bh: Blackhole): Unit = { + bh.consume(base + "e") + } +} |