diff --git a/rocketmq-common/src/main/java/com/alibaba/rocketmq/common/protocol/header/SendMessageRequestHeaderV2.java b/rocketmq-common/src/main/java/com/alibaba/rocketmq/common/protocol/header/SendMessageRequestHeaderV2.java
index dadf4bf0656f660db13ed1d85b5bf835bb5b3a85..6ce4cd5159abb4959697c09b5996963a51467d64 100644
--- a/rocketmq-common/src/main/java/com/alibaba/rocketmq/common/protocol/header/SendMessageRequestHeaderV2.java
+++ b/rocketmq-common/src/main/java/com/alibaba/rocketmq/common/protocol/header/SendMessageRequestHeaderV2.java
@@ -24,65 +24,66 @@ import com.alibaba.rocketmq.remoting.exception.RemotingCommandException;
 
 
 /**
+ * Use short variable name to speed up FastJson deserialization process.
  * @author shijia.wxr
  */
 public class SendMessageRequestHeaderV2 implements CommandCustomHeader {
     @CFNotNull
-    private String producerGroup;
+    private String a; // producerGroup;
     @CFNotNull
-    private String topic;
+    private String b; // topic;
     @CFNotNull
-    private String defaultTopic;
+    private String c; // defaultTopic;
     @CFNotNull
-    private Integer defaultTopicQueueNums;
+    private Integer d; // defaultTopicQueueNums;
     @CFNotNull
-    private Integer queueId;
+    private Integer e; // queueId;
     @CFNotNull
-    private Integer sysFlag;
+    private Integer f; // sysFlag;
     @CFNotNull
-    private Long bornTimestamp;
+    private Long g; // bornTimestamp;
     @CFNotNull
-    private Integer flag;
+    private Integer h; // flag;
     @CFNullable
-    private String properties;
+    private String i; // properties;
     @CFNullable
-    private Integer reconsumeTimes;
+    private Integer j; // reconsumeTimes;
     @CFNullable
-    private boolean unitMode;
+    private boolean k; // unitMode = false;
 
-    private Integer consumeRetryTimes;
+    private Integer l; // consumeRetryTimes
 
     public static SendMessageRequestHeader createSendMessageRequestHeaderV1(final SendMessageRequestHeaderV2 v2) {
         SendMessageRequestHeader v1 = new SendMessageRequestHeader();
-        v1.setProducerGroup(v2.producerGroup);
-        v1.setTopic(v2.topic);
-        v1.setDefaultTopic(v2.defaultTopic);
-        v1.setDefaultTopicQueueNums(v2.defaultTopicQueueNums);
-        v1.setQueueId(v2.queueId);
-        v1.setSysFlag(v2.sysFlag);
-        v1.setBornTimestamp(v2.bornTimestamp);
-        v1.setFlag(v2.flag);
-        v1.setProperties(v2.properties);
-        v1.setReconsumeTimes(v2.reconsumeTimes);
-        v1.setUnitMode(v2.unitMode);
-        v1.setMaxReconsumeTimes(v2.consumeRetryTimes);
+        v1.setProducerGroup(v2.a);
+        v1.setTopic(v2.b);
+        v1.setDefaultTopic(v2.c);
+        v1.setDefaultTopicQueueNums(v2.d);
+        v1.setQueueId(v2.e);
+        v1.setSysFlag(v2.f);
+        v1.setBornTimestamp(v2.g);
+        v1.setFlag(v2.h);
+        v1.setProperties(v2.i);
+        v1.setReconsumeTimes(v2.j);
+        v1.setUnitMode(v2.k);
+        v1.setMaxReconsumeTimes(v2.l);
         return v1;
     }
 
     public static SendMessageRequestHeaderV2 createSendMessageRequestHeaderV2(final SendMessageRequestHeader v1) {
         SendMessageRequestHeaderV2 v2 = new SendMessageRequestHeaderV2();
-        v2.producerGroup = v1.getProducerGroup();
-        v2.topic = v1.getTopic();
-        v2.defaultTopic = v1.getDefaultTopic();
-        v2.defaultTopicQueueNums = v1.getDefaultTopicQueueNums();
-        v2.queueId = v1.getQueueId();
-        v2.sysFlag = v1.getSysFlag();
-        v2.bornTimestamp = v1.getBornTimestamp();
-        v2.flag = v1.getFlag();
-        v2.properties = v1.getProperties();
-        v2.reconsumeTimes = v1.getReconsumeTimes();
-        v2.unitMode = v1.isUnitMode();
-        v2.consumeRetryTimes = v1.getMaxReconsumeTimes();
+        v2.a = v1.getProducerGroup();
+        v2.b = v1.getTopic();
+        v2.c = v1.getDefaultTopic();
+        v2.d = v1.getDefaultTopicQueueNums();
+        v2.e = v1.getQueueId();
+        v2.f = v1.getSysFlag();
+        v2.g = v1.getBornTimestamp();
+        v2.h = v1.getFlag();
+        v2.i = v1.getProperties();
+        v2.j = v1.getReconsumeTimes();
+        v2.k = v1.isUnitMode();
+        v2.l = v1.getMaxReconsumeTimes();
         return v2;
     }
 
@@ -90,122 +91,122 @@ public class SendMessageRequestHeaderV2 implements CommandCustomHeader {
     public void checkFields() throws RemotingCommandException {
     }
 
-    public String getProducerGroup() {
-        return producerGroup;
+    public String getA() {
+        return a;
     }
 
 
-    public void setProducerGroup(String producerGroup) {
-        this.producerGroup = producerGroup;
+    public void setA(String a) {
+        this.a = a;
     }
 
 
-    public String getTopic() {
-        return topic;
+    public String getB() {
+        return b;
     }
 
 
-    public void setTopic(String topic) {
-        this.topic = topic;
+    public void setB(String b) {
+        this.b = b;
     }
 
 
-    public String getDefaultTopic() {
-        return defaultTopic;
+    public String getC() {
+        return c;
     }
 
 
-    public void setDefaultTopic(String defaultTopic) {
-        this.defaultTopic = defaultTopic;
+    public void setC(String c) {
+        this.c = c;
     }
 
 
-    public Integer getDefaultTopicQueueNums() {
-        return defaultTopicQueueNums;
+    public Integer getD() {
+        return d;
     }
 
 
-    public void setDefaultTopicQueueNums(Integer defaultTopicQueueNums) {
-        this.defaultTopicQueueNums = defaultTopicQueueNums;
+    public void setD(Integer d) {
+        this.d = d;
     }
 
 
-    public Integer getQueueId() {
-        return queueId;
+    public Integer getE() {
+        return e;
     }
 
 
-    public void setQueueId(Integer queueId) {
-        this.queueId = queueId;
+    public void setE(Integer e) {
+        this.e = e;
     }
 
 
-    public Integer getSysFlag() {
-        return sysFlag;
+    public Integer getF() {
+        return f;
     }
 
 
-    public void setSysFlag(Integer sysFlag) {
-        this.sysFlag = sysFlag;
+    public void setF(Integer f) {
+        this.f = f;
     }
 
 
-    public Long getBornTimestamp() {
-        return bornTimestamp;
+    public Long getG() {
+        return g;
     }
 
 
-    public void setBornTimestamp(Long bornTimestamp) {
-        this.bornTimestamp = bornTimestamp;
+    public void setG(Long g) {
+        this.g = g;
     }
 
 
-    public Integer getFlag() {
-        return flag;
+    public Integer getH() {
+        return h;
     }
 
 
-    public void setFlag(Integer flag) {
-        this.flag = flag;
+    public void setH(Integer h) {
+        this.h = h;
     }
 
 
-    public String getProperties() {
-        return properties;
+    public String getI() {
+        return i;
     }
 
 
-    public void setProperties(String properties) {
-        this.properties = properties;
+    public void setI(String i) {
+        this.i = i;
     }
 
 
-    public Integer getReconsumeTimes() {
-        return reconsumeTimes;
+    public Integer getJ() {
+        return j;
     }
 
 
-    public void setReconsumeTimes(Integer reconsumeTimes) {
-        this.reconsumeTimes = reconsumeTimes;
+    public void setJ(Integer j) {
+        this.j = j;
     }
 
 
-    public boolean isUnitMode() {
-        return unitMode;
+    public boolean isK() {
+        return k;
     }
 
 
-    public void setUnitMode(boolean unitMode) {
-        this.unitMode = unitMode;
+    public void setK(boolean k) {
+        this.k = k;
     }
 
 
-    public Integer getConsumeRetryTimes() {
-        return consumeRetryTimes;
+    public Integer getL() {
+        return l;
     }
 
 
-    public void setConsumeRetryTimes(final Integer consumeRetryTimes) {
-        this.consumeRetryTimes = consumeRetryTimes;
+    public void setL(final Integer l) {
+        this.l = l;
     }
-}
+}
\ No newline at end of file