Core: Add ManifestWrite benchmark

core/src/jmh/java/org/apache/iceberg/ManifestReadBenchmark.java

@@ -69,10 +69,9 @@ public void before() {
     manifestListFile = String.format("%s/%s.avro", baseDir, UUID.randomUUID());
 
     Random random = new Random(System.currentTimeMillis());
-    ManifestListWriter listWriter =
-        ManifestLists.write(1, org.apache.iceberg.Files.localOutput(manifestListFile), 0, 1L, 0);
 
-    try {
+    try (ManifestListWriter listWriter =
+        ManifestLists.write(1, org.apache.iceberg.Files.localOutput(manifestListFile), 0, 1L, 0)) {
       for (int i = 0; i < NUM_FILES; i++) {
         OutputFile manifestFile =
             org.apache.iceberg.Files.localOutput(
@@ -98,8 +97,6 @@ public void before() {
 
         listWriter.add(writer.toManifestFile());
       }
-
-      listWriter.close();
     } catch (IOException e) {
       throw new UncheckedIOException(e);
     }

core/src/jmh/java/org/apache/iceberg/ManifestWriteBenchmark.java

@@ -0,0 +1,153 @@
+/*
+ * 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;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
+import java.util.Map;
+import java.util.Random;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+import org.apache.commons.io.FileUtils;
+import org.apache.iceberg.io.OutputFile;
+import org.apache.iceberg.relocated.com.google.common.collect.Maps;
+import org.apache.iceberg.relocated.com.google.common.io.Files;
+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.Threads;
+import org.openjdk.jmh.annotations.Timeout;
+
+/**
+ * A benchmark that evaluates the performance of writing manifest files
+ *
+ * <p>To run this benchmark: <code>
+ *   ./gradlew :iceberg-core:jmh -PjmhIncludeRegex=ManifestWriteBenchmark
+ * </code>
+ */
+@Fork(1)
+@State(Scope.Benchmark)
+@Measurement(iterations = 5)
+@BenchmarkMode(Mode.SingleShotTime)
+@Timeout(time = 1000, timeUnit = TimeUnit.HOURS)
+public class ManifestWriteBenchmark {
+
+  private static final int NUM_FILES = 10;
+  private static final int NUM_ROWS = 100000;
+  private static final int NUM_COLS = 100;
+
+  private String baseDir;
+  private String manifestListFile;
+
+  private Metrics metrics;
+
+  @Setup
+  public void before() {
+    Random random = new Random(System.currentTimeMillis());
+    // Pre-create the metrics to avoid doing this in the benchmark itself
+    metrics = randomMetrics(random);
+  }
+
+  @TearDown
+  public void after() {
+    if (baseDir != null) {
+      FileUtils.deleteQuietly(new File(baseDir));
+      baseDir = null;
+    }
+
+    manifestListFile = null;
+  }
+
+  @Benchmark
+  @Threads(1)
+  public void writeManifestFile() throws IOException {
+    baseDir = Files.createTempDir().getAbsolutePath();
+    manifestListFile = String.format("%s/%s.avro", baseDir, UUID.randomUUID());
+
+    try (ManifestListWriter listWriter =
+        ManifestLists.write(1, org.apache.iceberg.Files.localOutput(manifestListFile), 0, 1L, 0)) {
+      for (int i = 0; i < NUM_FILES; i++) {
+        OutputFile manifestFile =
+            org.apache.iceberg.Files.localOutput(
+                String.format("%s/%s.avro", baseDir, UUID.randomUUID()));
+
+        ManifestWriter<DataFile> writer =
+            ManifestFiles.write(1, PartitionSpec.unpartitioned(), manifestFile, 1L);
+        try (ManifestWriter<DataFile> finalWriter = writer) {
+          for (int j = 0; j < NUM_ROWS; j++) {
+            DataFile dataFile =
+                DataFiles.builder(PartitionSpec.unpartitioned())
+                    .withFormat(FileFormat.PARQUET)
+                    .withPath(String.format("/path/to/data-%s-%s.parquet", i, j))
+                    .withFileSizeInBytes(j)
+                    .withRecordCount(j)
+                    .withMetrics(metrics)
+                    .build();
+            finalWriter.add(dataFile);
+          }
+        } catch (IOException e) {
+          throw new UncheckedIOException(e);
+        }
+
+        listWriter.add(writer.toManifestFile());
+      }
+    } catch (IOException e) {
+      throw new UncheckedIOException(e);
+    }
+  }
+
+  private Metrics randomMetrics(Random random) {
+    long rowCount = 100000L + random.nextInt(1000);
+    Map<Integer, Long> columnSizes = Maps.newHashMap();
+    Map<Integer, Long> valueCounts = Maps.newHashMap();
+    Map<Integer, Long> nullValueCounts = Maps.newHashMap();
+    Map<Integer, Long> nanValueCounts = Maps.newHashMap();
+    Map<Integer, ByteBuffer> lowerBounds = Maps.newHashMap();
+    Map<Integer, ByteBuffer> upperBounds = Maps.newHashMap();
+    for (int i = 0; i < NUM_COLS; i++) {
+      columnSizes.put(i, 1000000L + random.nextInt(100000));
+      valueCounts.put(i, 100000L + random.nextInt(100));
+      nullValueCounts.put(i, (long) random.nextInt(5));
+      nanValueCounts.put(i, (long) random.nextInt(5));
+      byte[] lower = new byte[8];
+      random.nextBytes(lower);
+      lowerBounds.put(i, ByteBuffer.wrap(lower));
+      byte[] upper = new byte[8];
+      random.nextBytes(upper);
+      upperBounds.put(i, ByteBuffer.wrap(upper));
+    }
+
+    return new Metrics(
+        rowCount,
+        columnSizes,
+        valueCounts,
+        nullValueCounts,
+        nanValueCounts,
+        lowerBounds,
+        upperBounds);
+  }
+}