Slight performance improvment for MutableHandlerRegistryImpl

benchmarks/src/jmh/java/io/grpc/benchmarks/netty/HandlerRegistryBenchmark.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright 2015, Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *    * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ *    * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package io.grpc.benchmarks.netty;
+
+import io.grpc.MutableHandlerRegistryImpl;
+import io.grpc.ServerMethodDefinition;
+import io.grpc.ServerServiceDefinition;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Level;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.Setup;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.infra.Blackhole;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+/**
+ * Benchmark for {@link io.grpc.MutableHandlerRegistryImpl}.
+ */
+@State(Scope.Benchmark)
+@Fork(1)
+public class HandlerRegistryBenchmark {
+
+  private static final String VALID_CHARACTERS =
+          "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.";
+
+  @Param({"50"})
+  public int nameLength;
+
+  @Param({"100"})
+  public int serviceCount;
+
+  @Param({"100"})
+  public int methodCountPerService;
+
+  private MutableHandlerRegistryImpl registry;
+  private List<String> fullMethodNames;
+
+  /**
+   * Set up the registry.
+   */
+  @Setup(Level.Trial)
+  public void setup() throws Exception {
+    registry = new MutableHandlerRegistryImpl();
+    fullMethodNames = new ArrayList<String>(serviceCount * methodCountPerService);
+    for (int serviceIndex = 0; serviceIndex < serviceCount; ++serviceIndex) {
+      String serviceName = randomString();
+      ServerServiceDefinition.Builder serviceBuilder = ServerServiceDefinition.builder(serviceName);
+      for (int methodIndex = 0; methodIndex < methodCountPerService; ++methodIndex) {
+        String methodName = randomString();
+        serviceBuilder.addMethod(ServerMethodDefinition.create(methodName, null, null, null));
+        fullMethodNames.add("/" + serviceName + "/" + methodName);
+      }
+      registry.addService(serviceBuilder.build());
+    }
+  }
+
+  /**
+   * Benchmark the {@link io.grpc.HandlerRegistry#lookupMethod(String)} throughput.
+   */
+  @Benchmark
+  public void lookupMethod(Blackhole bh) {
+    for (String fullMethodName : fullMethodNames) {
+      bh.consume(registry.lookupMethod(fullMethodName));
+    }
+  }
+
+  private String randomString() {
+    Random r = new Random();
+    char[] bytes = new char[nameLength];
+    for (int ix = 0; ix < nameLength; ++ix) {
+      int charIx = r.nextInt(VALID_CHARACTERS.length());
+      bytes[ix] = VALID_CHARACTERS.charAt(charIx);
+    }
+    return new String(bytes);
+  }
+}

core/src/main/java/io/grpc/MutableHandlerRegistryImpl.java

@@ -62,15 +62,14 @@ public final class MutableHandlerRegistryImpl extends MutableHandlerRegistry {
   @Override
   @Nullable
   public Method lookupMethod(String methodName) {
-    if (!methodName.startsWith("/")) {
-      return null;
-    }
-    methodName = methodName.substring(1);
     int index = methodName.lastIndexOf("/");
-    if (index == -1) {
+    if (index < 2 || methodName.charAt(0) != '/') {
+      // Since the string is expected to be in the form /<serviceName>/<methodName>, the index
+      // position of the last "/" must be >= 2 in order to make room for the initial "/" and at
+      // least 1 character for the service name.
       return null;
     }
-    ServerServiceDefinition service = services.get(methodName.substring(0, index));
+    ServerServiceDefinition service = services.get(methodName.substring(1, index));
     if (service == null) {
       return null;
     }

gradle/wrapper/gradle-wrapper.properties

@@ -1,4 +1,4 @@
-#Thu Apr 09 18:06:16 PDT 2015
+#Tue May 12 09:49:30 PDT 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME