diff --git a/quickfixj-perf-test/src/main/java/org/quickfixj/FIXMessageCodecPerfTest.java b/quickfixj-perf-test/src/main/java/org/quickfixj/FIXMessageCodecPerfTest.java
new file mode 100644
index 0000000000..0593a09c93
--- /dev/null
+++ b/quickfixj-perf-test/src/main/java/org/quickfixj/FIXMessageCodecPerfTest.java
@@ -0,0 +1,143 @@
+package org.quickfixj;
+
+import org.apache.mina.core.buffer.IoBuffer;
+import org.apache.mina.core.filterchain.IoFilter;
+import org.apache.mina.core.session.IoSession;
+import org.apache.mina.filter.codec.ProtocolCodecException;
+import org.apache.mina.filter.codec.ProtocolDecoderOutput;
+import org.apache.mina.filter.codec.ProtocolEncoderOutput;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.Setup;
+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;
+import quickfix.field.AllocAccount;
+import quickfix.field.AllocQty;
+import quickfix.field.ClOrdID;
+import quickfix.field.HandlInst;
+import quickfix.field.OrdType;
+import quickfix.field.OrderQty;
+import quickfix.field.Price;
+import quickfix.field.Side;
+import quickfix.field.Symbol;
+import quickfix.field.TransactTime;
+import quickfix.fix44.NewOrderSingle;
+import quickfix.mina.message.FIXMessageDecoder;
+import quickfix.mina.message.FIXMessageEncoder;
+
+import java.nio.charset.StandardCharsets;
+import java.time.LocalDateTime;
+
+/**
+ * JMH benchmark measuring encoding and decoding performance of
+ * {@link FIXMessageEncoder} and {@link FIXMessageDecoder} for a FIX 4.4
+ * NewOrderSingle message, with and without a repeating group.
+ */
+public class FIXMessageCodecPerfTest extends AbstractPerfTest {
+
+    private FIXMessageEncoder encoder;
+    private FIXMessageDecoder decoder;
+
+    private NewOrderSingle newOrderSingle;
+    private NewOrderSingle newOrderSingleWithGroup;
+
+    private IoBuffer bufferWithoutGroup;
+    private IoBuffer bufferWithGroup;
+
+    private final ProtocolEncoderOutput encoderOutput = new ProtocolEncoderOutput() {
+        @Override
+        public void write(Object message) {
+            // discard – we only measure encoding time
+        }
+    };
+
+    private final ProtocolDecoderOutput decoderOutput = new ProtocolDecoderOutput() {
+        @Override
+        public void write(Object message) {
+            // discard – we only measure decoding time
+        }
+
+        @Override
+        public void flush(IoFilter.NextFilter nextFilter, IoSession session) {
+        }
+    };
+
+    @Setup
+    public void prepare() throws Exception {
+        encoder = new FIXMessageEncoder();
+        decoder = new FIXMessageDecoder();
+
+        newOrderSingle = buildNewOrderSingle();
+        newOrderSingleWithGroup = buildNewOrderSingleWithGroup();
+
+        bufferWithoutGroup = toIoBuffer(newOrderSingle.toString());
+        bufferWithGroup = toIoBuffer(newOrderSingleWithGroup.toString());
+    }
+
+    private static NewOrderSingle buildNewOrderSingle() {
+        NewOrderSingle order = new NewOrderSingle(
+                new ClOrdID("ORDER-001"),
+                new Side(Side.BUY),
+                new TransactTime(LocalDateTime.of(2006, 3, 24, 1, 5, 58)),
+                new OrdType(OrdType.LIMIT));
+        order.set(new Symbol("AAPL"));
+        order.set(new OrderQty(100));
+        order.set(new Price(150.00));
+        order.set(new HandlInst(HandlInst.AUTOMATED_EXECUTION_NO_INTERVENTION));
+        return order;
+    }
+
+    private static NewOrderSingle buildNewOrderSingleWithGroup() {
+        NewOrderSingle order = buildNewOrderSingle();
+
+        NewOrderSingle.NoAllocs alloc1 = new NewOrderSingle.NoAllocs();
+        alloc1.set(new AllocAccount("ACC1"));
+        alloc1.set(new AllocQty(50));
+        order.addGroup(alloc1);
+
+        NewOrderSingle.NoAllocs alloc2 = new NewOrderSingle.NoAllocs();
+        alloc2.set(new AllocAccount("ACC2"));
+        alloc2.set(new AllocQty(50));
+        order.addGroup(alloc2);
+
+        return order;
+    }
+
+    private static IoBuffer toIoBuffer(String message) {
+        byte[] bytes = message.getBytes(StandardCharsets.ISO_8859_1);
+        IoBuffer buffer = IoBuffer.allocate(bytes.length);
+        buffer.put(bytes);
+        buffer.flip();
+        return buffer;
+    }
+
+    @Benchmark
+    public void encodeWithoutGroup() throws ProtocolCodecException {
+        encoder.encode(null, newOrderSingle, encoderOutput);
+    }
+
+    @Benchmark
+    public void encodeWithGroup() throws ProtocolCodecException {
+        encoder.encode(null, newOrderSingleWithGroup, encoderOutput);
+    }
+
+    @Benchmark
+    public void decodeWithoutGroup() throws ProtocolCodecException {
+        bufferWithoutGroup.rewind();
+        decoder.decode(null, bufferWithoutGroup, decoderOutput);
+    }
+
+    @Benchmark
+    public void decodeWithGroup() throws ProtocolCodecException {
+        bufferWithGroup.rewind();
+        decoder.decode(null, bufferWithGroup, decoderOutput);
+    }
+
+    public static void main(String[] args) throws RunnerException {
+        Options opt = new OptionsBuilder()
+                .include(".*" + FIXMessageCodecPerfTest.class.getSimpleName() + ".*")
+                .build();
+        new Runner(opt).run();
+    }
+}