Add Uuid vector benchmarks

Author: jhrotko

performance/src/main/java/org/apache/arrow/vector/UuidVectorBenchmarks.java

@@ -0,0 +1,163 @@
+/*
+ * 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.arrow.vector;
+
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+import org.apache.arrow.memory.BufferAllocator;
+import org.apache.arrow.memory.RootAllocator;
+import org.apache.arrow.vector.complex.impl.UuidWriterImpl;
+import org.apache.arrow.vector.holders.NullableUuidHolder;
+import org.apache.arrow.vector.holders.UuidHolder;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+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.profile.GCProfiler;
+import org.openjdk.jmh.runner.Runner;
+import org.openjdk.jmh.runner.RunnerException;
+import org.openjdk.jmh.runner.options.Options;
+import org.openjdk.jmh.runner.options.OptionsBuilder;
+
+/** Benchmarks for {@link UuidVector}. */
+@State(Scope.Benchmark)
+public class UuidVectorBenchmarks {
+  // checkstyle:off: MissingJavadocMethod
+
+  private static final int VECTOR_LENGTH = 10_000;
+
+  private static final int ALLOCATOR_CAPACITY = 1024 * 1024;
+
+  private BufferAllocator allocator;
+
+  private UuidVector vector;
+
+  private UUID[] testUuids;
+
+  @Setup
+  public void prepare() {
+    allocator = new RootAllocator(ALLOCATOR_CAPACITY);
+    vector = new UuidVector("vector", allocator);
+    vector.allocateNew(VECTOR_LENGTH);
+    vector.setValueCount(VECTOR_LENGTH);
+
+    // Pre-generate UUIDs for consistent benchmarking
+    testUuids = new UUID[VECTOR_LENGTH];
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      testUuids[i] = new UUID(i, i * 2L);
+    }
+  }
+
+  @TearDown
+  public void tearDown() {
+    vector.close();
+    allocator.close();
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setWithUuidHolder() {
+    UuidHolder holder = new UuidHolder();
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      // Old version: get the holder populated with buffer reference, then set it back
+      vector.get(i, holder);
+      vector.setSafe(i, holder);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setWithNullableUuidHolder() {
+    NullableUuidHolder holder = new NullableUuidHolder();
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      // Old version: get the holder populated with buffer reference, then set it back
+      holder.isSet = i % 3 == 0 ? 0 : 1;
+      if (holder.isSet == 1) {
+        vector.get(i, holder);
+      }
+      vector.setSafe(i, holder);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setUuidDirectly() {
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      vector.setSafe(i, testUuids[i]);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void setWithWriter() {
+    UuidWriterImpl writer = new UuidWriterImpl(vector);
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      if (i % 3 != 0) {
+        writer.writeExtension(testUuids[i]);
+      }
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void getWithUuidHolder() {
+    UuidHolder holder = new UuidHolder();
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      vector.get(i, holder);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void getWithNullableUuidHolder() {
+    NullableUuidHolder holder = new NullableUuidHolder();
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      vector.get(i, holder);
+    }
+  }
+
+  @Benchmark
+  @BenchmarkMode(Mode.AverageTime)
+  @OutputTimeUnit(TimeUnit.MICROSECONDS)
+  public void getUuidDirectly() {
+    for (int i = 0; i < VECTOR_LENGTH; i++) {
+      UUID uuid = vector.getObject(i);
+    }
+  }
+
+  public static void main(String[] args) throws RunnerException {
+    Options opt =
+      new OptionsBuilder()
+        .include(UuidVectorBenchmarks.class.getSimpleName())
+        .forks(1)
+        .addProfiler(GCProfiler.class)
+        .build();
+
+    new Runner(opt).run();
+  }
+  // checkstyle:on: MissingJavadocMethod
+}