Core: Add portable Roaring bitmap for row positions

LICENSE

@@ -298,6 +298,7 @@ License: https://www.apache.org/licenses/LICENSE-2.0
 This product includes code from Delta Lake.
 
 * AssignmentAlignmentSupport is an independent development but UpdateExpressionsSupport in Delta was used as a reference.
+* RoaringPositionBitmap is a Java implementation of RoaringBitmapArray in Delta.
 
 Copyright: 2020 The Delta Lake Project Authors.
 Home page: https://delta.io/

core/src/jmh/java/org/apache/iceberg/deletes/RoaringPositionBitmapBenchmark.java

@@ -0,0 +1,164 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.iceberg.deletes;
+
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+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.Threads;
+import org.openjdk.jmh.annotations.Timeout;
+import org.openjdk.jmh.annotations.Warmup;
+import org.openjdk.jmh.infra.Blackhole;
+import org.roaringbitmap.longlong.Roaring64Bitmap;
+
+/**
+ * A benchmark that evaluates the performance of {@link RoaringPositionBitmap}.
+ *
+ * <p>To run this benchmark: <code>
+ *   ./gradlew :iceberg-core:jmh
+ *       -PjmhIncludeRegex=RoaringPositionBitmapBenchmark
+ *       -PjmhOutputPath=benchmark/roaring-position-bitmap-benchmark.txt
+ * </code>
+ */
+@Fork(1)
+@State(Scope.Benchmark)
+@Warmup(iterations = 3)
+@Measurement(iterations = 5)
+@BenchmarkMode(Mode.SingleShotTime)
+@Timeout(time = 5, timeUnit = TimeUnit.MINUTES)
+public class RoaringPositionBitmapBenchmark {
+
+  private static final Random RANDOM = new Random();
+  private static final int TOTAL_POSITIONS = 5_000_000;
+  private static final long STEP = 5L;
+
+  private long[] orderedPositions;
+  private long[] shuffledPositions;
+
+  @Setup
+  public void setupBenchmark() {
+    this.orderedPositions = generateOrderedPositions();
+    this.shuffledPositions = generateShuffledPositions();
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void addOrderedPositionsIcebergBitmap(Blackhole blackhole) {
+    RoaringPositionBitmap bitmap = new RoaringPositionBitmap();
+    for (long position : orderedPositions) {
+      bitmap.add(position);
+    }
+    blackhole.consume(bitmap);
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void addOrderedPositionsLibraryBitmap(Blackhole blackhole) {
+    Roaring64Bitmap bitmap = new Roaring64Bitmap();
+    for (long position : orderedPositions) {
+      bitmap.add(position);
+    }
+    blackhole.consume(bitmap);
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void addShuffledPositionsIcebergBitmap(Blackhole blackhole) {
+    RoaringPositionBitmap bitmap = new RoaringPositionBitmap();
+    for (long position : shuffledPositions) {
+      bitmap.add(position);
+    }
+    blackhole.consume(bitmap);
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void addShuffledPositionsLibraryBitmap(Blackhole blackhole) {
+    Roaring64Bitmap bitmap = new Roaring64Bitmap();
+    for (long position : shuffledPositions) {
+      bitmap.add(position);
+    }
+    blackhole.consume(bitmap);
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void addAndCheckPositionsIcebergBitmap(Blackhole blackhole) {
+    RoaringPositionBitmap bitmap = new RoaringPositionBitmap();
+
+    for (long position : shuffledPositions) {
+      bitmap.add(position);
+    }
+
+    for (long position = 0; position <= TOTAL_POSITIONS * STEP; position++) {
+      bitmap.contains(position);
+    }
+
+    blackhole.consume(bitmap);
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void addAndCheckPositionsLibraryBitmap(Blackhole blackhole) {
+    Roaring64Bitmap bitmap = new Roaring64Bitmap();
+
+    for (long position : shuffledPositions) {
+      bitmap.add(position);
+    }
+
+    for (long position = 0; position <= TOTAL_POSITIONS * STEP; position++) {
+      bitmap.contains(position);
+    }
+
+    blackhole.consume(bitmap);
+  }
+
+  private static long[] generateOrderedPositions() {
+    long[] positions = new long[TOTAL_POSITIONS];
+
+    for (int index = 0; index < TOTAL_POSITIONS; index++) {
+      positions[index] = index * STEP;
+    }
+
+    return positions;
+  }
+
+  private static long[] generateShuffledPositions() {
+    long[] positions = generateOrderedPositions();
+    shuffle(positions);
+    return positions;
+  }
+
+  private static void shuffle(long[] array) {
+    for (int index = array.length - 1; index > 0; index--) {
+      // swap with an element at a random index between 0 and index
+      int thatIndex = RANDOM.nextInt(index + 1);
+      long temp = array[index];
+      array[index] = array[thatIndex];
+      array[thatIndex] = temp;
+    }
+  }
+}