add JMH

Add benchmark for a comparison of the custom made removeAll
method vs an implementation that uses removeIf

primitiveCollections/src/jmh/java/org/lucares/collections/BenchmarkRemoveAll.java

@@ -0,0 +1,59 @@
+package org.lucares.collections;
+
+import java.util.concurrent.TimeUnit;
+import java.util.stream.IntStream;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.TearDown;
+import org.openjdk.jmh.annotations.Warmup;
+
+@State(Scope.Benchmark)
+@BenchmarkMode(Mode.Throughput)
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Fork(1)
+public class BenchmarkRemoveAll {
+
+	private IntList base = null;
+	private IntList remove = null;
+
+	@Setup
+	public void setup() throws Exception {
+
+		final int values = 100_000;
+		base = IntList.of();
+		IntStream.range(0, values).forEachOrdered(i -> base.add(i));
+		base.sort();
+
+		remove = IntList.of();
+		IntStream.range(0, 50).forEachOrdered(i -> remove.add(i));
+		remove.sort();
+	}
+
+	@TearDown
+	public void tearDown() {
+		base = null;
+		remove = null;
+	}
+
+	@Benchmark
+	public void testRemoveAll() throws Exception {
+
+		final IntList tmp = base.clone();
+		tmp.removeAll(remove);
+	}
+
+	@Benchmark
+	public void testRemoveAll_withRemoveIf() throws Exception {
+
+		final IntList tmp = base.clone();
+		tmp.removeIf((val, index) -> remove.indexOf(val) >= 0);
+	}
+}