Fix JMH benchmark and update JMH version

pom.xml

@@ -61,7 +61,7 @@
     <stack.version>3.5.0-SNAPSHOT</stack.version>
     <jetty.alpnAgent.version>2.0.6</jetty.alpnAgent.version>
     <jetty.alpnAgent.path>${settings.localRepository}/org/mortbay/jetty/alpn/jetty-alpn-agent/${jetty.alpnAgent.version}/jetty-alpn-agent-${jetty.alpnAgent.version}.jar</jetty.alpnAgent.path>
-    <jmh.version>1.17.3</jmh.version>
+    <jmh.version>1.19</jmh.version>
 
   </properties>
 

src/test/benchmarks/io/vertx/benchmarks/BenchmarkBase.java

@@ -32,7 +32,7 @@
 @Measurement(iterations = 10, time = 2, timeUnit = TimeUnit.SECONDS)
 @Threads(1)
 @BenchmarkMode(Mode.Throughput)
-@Fork(value = 1, jvmArgsAppend = {
+@Fork(value = 1, jvmArgs = {
     "-XX:+UseBiasedLocking",
     "-XX:BiasedLockingStartupDelay=0",
     "-XX:+AggressiveOpts",

src/test/benchmarks/io/vertx/benchmarks/HttpServerBenchmark.java

@@ -65,10 +65,13 @@
 @Threads(16)
 public class HttpServerBenchmark extends BenchmarkBase {
 
+  private static final ByteBuf GET = Unpooled.unreleasableBuffer(Unpooled.copiedBuffer((
+    "GET / HTTP/1.1\r\n" +
+      "\r\n").getBytes()));
+
   VertxInternal vertx;
   EmbeddedChannel vertxChannel;
   EmbeddedChannel nettyChannel;
-  ByteBuf GET;
 
   private static final CharSequence RESPONSE_TYPE_PLAIN = io.vertx.core.http.HttpHeaders.createOptimized("text/plain");
 
@@ -111,9 +114,6 @@ public void setup() {
     HandlerHolder<HttpHandlers> holder = new HandlerHolder<>(context, new HttpHandlers(app, null, null));
     ServerHandler handler = new ServerHandler(null, new HttpServerOptions(), "localhost", holder, null);
     vertxChannel.pipeline().addLast("handler", handler);
-    GET = Unpooled.unreleasableBuffer(Unpooled.copiedBuffer((
-        "GET / HTTP/1.1\r\n" +
-            "\r\n").getBytes()));
 
     nettyChannel = new EmbeddedChannel(new HttpRequestDecoder(
         options.getMaxInitialLineLength(),
@@ -164,31 +164,26 @@ private void writeResponse(ChannelHandlerContext ctx, HttpRequest request, ByteB
   @Benchmark
   public void vertx(Blackhole blackhole) {
     vertxChannel.writeInbound(GET);
-    Object result = vertxChannel.outboundMessages().poll();
+    ByteBuf result = (ByteBuf) vertxChannel.outboundMessages().poll();
     blackhole.consume(result);
   }
 
   @Fork(value = 1, jvmArgsAppend = {
-      "-XX:+UseBiasedLocking",
-      "-XX:BiasedLockingStartupDelay=0",
       "-Dvertx.threadChecks=false",
       "-Dvertx.disableContextTimings=true",
       "-Dvertx.disableTCCL=true ",
-      "-XX:+AggressiveOpts",
-      "-Djmh.executor=CUSTOM",
-      "-Djmh.executor.class=io.vertx.core.impl.VertxExecutorService"
   })
   @Benchmark
   public void vertxOpt(Blackhole blackhole) {
     vertxChannel.writeInbound(GET);
-    Object result = vertxChannel.outboundMessages().poll();
+    ByteBuf result = (ByteBuf) vertxChannel.outboundMessages().poll();
     blackhole.consume(result);
   }
 
   @Benchmark
   public void netty(Blackhole blackhole) {
     nettyChannel.writeInbound(GET);
-    Object result = nettyChannel.outboundMessages().poll();
+    ByteBuf result = (ByteBuf) nettyChannel.outboundMessages().poll();
     blackhole.consume(result);
   }
 }