diff --git a/src/main/java/org/redkale/boot/ApiDocCommand.java b/src/main/java/org/redkale/boot/ApiDocCommand.java
index 8121d2028..a2891e703 100644
--- a/src/main/java/org/redkale/boot/ApiDocCommand.java
+++ b/src/main/java/org/redkale/boot/ApiDocCommand.java
@@ -595,7 +595,7 @@ public final class ApiDocCommand {
                         if (col != null) {
                             desc = col.comment();
                             if (!col.nullable()) {
-                                requireds.add(member.getAttribute().field());
+                                requireds.add(member.getFieldName());
                             }
                         }
                         if (desc.isEmpty() && member.getField().getAnnotation(Comment.class) != null) {
@@ -613,7 +613,7 @@ public final class ApiDocCommand {
                         if (col != null) {
                             desc = col.comment();
                             if (!col.nullable()) {
-                                requireds.add(member.getAttribute().field());
+                                requireds.add(member.getFieldName());
                             }
                         }
                         if (desc.isEmpty() && member.getMethod().getAnnotation(Comment.class) != null) {
@@ -630,7 +630,7 @@ public final class ApiDocCommand {
                     if (!desc.isEmpty()) {
                         schemaMap.put("description", desc);
                     }
-                    properties.put(member.getAttribute().field(), schemaMap);
+                    properties.put(member.getFieldName(), schemaMap);
                 }
             }
             if (!requireds.isEmpty()) {
@@ -899,7 +899,7 @@ public final class ApiDocCommand {
                         if (index > 0) {
                             json.append(",");
                         }
-                        json.append('"').append(member.getAttribute().field()).append("\":{}");
+                        json.append('"').append(member.getFieldName()).append("\":{}");
                         index++;
                     }
                     json.append("}");
diff --git a/src/main/java/org/redkale/convert/DeMember.java b/src/main/java/org/redkale/convert/DeMember.java
index fd1f15a1e..837bcd324 100644
--- a/src/main/java/org/redkale/convert/DeMember.java
+++ b/src/main/java/org/redkale/convert/DeMember.java
@@ -119,6 +119,10 @@ public final class DeMember<R extends Reader, T, F> {
         return ((TagDecodeable<R, F>) decoder).convertFrom(in, this);
     }
 
+    public String getFieldName() {
+        return this.attribute.field();
+    }
+
     public Attribute<T, F> getAttribute() {
         return this.attribute;
     }
diff --git a/src/main/java/org/redkale/convert/DeMemberInfo.java b/src/main/java/org/redkale/convert/DeMemberInfo.java
index f52c2eb09..564a20b7f 100644
--- a/src/main/java/org/redkale/convert/DeMemberInfo.java
+++ b/src/main/java/org/redkale/convert/DeMemberInfo.java
@@ -30,7 +30,7 @@ public class DeMemberInfo {
         this.memberFieldMap = new HashMap<>(deMembers.length);
         this.memberTagMap = new HashMap<>(deMembers.length);
         for (DeMember member : deMembers) {
-            this.memberFieldMap.put(member.getAttribute().field(), member);
+            this.memberFieldMap.put(member.getFieldName(), member);
             this.memberTagMap.put(member.getTag(), member);
         }
         this.memberNode = DeMemberNode.create(deMembers);
diff --git a/src/main/java/org/redkale/convert/EnMember.java b/src/main/java/org/redkale/convert/EnMember.java
index 57220eaf8..fcf9c7a0d 100644
--- a/src/main/java/org/redkale/convert/EnMember.java
+++ b/src/main/java/org/redkale/convert/EnMember.java
@@ -137,6 +137,10 @@ public final class EnMember<W extends Writer, T, F> {
         return attribute.field().equals(name);
     }
 
+    public String getFieldName() {
+        return this.attribute.field();
+    }
+
     public Attribute<T, F> getAttribute() {
         return attribute;
     }
diff --git a/src/main/java/org/redkale/convert/ObjectDecoder.java b/src/main/java/org/redkale/convert/ObjectDecoder.java
index 2d461939f..ccf8a4fb0 100644
--- a/src/main/java/org/redkale/convert/ObjectDecoder.java
+++ b/src/main/java/org/redkale/convert/ObjectDecoder.java
@@ -359,13 +359,12 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
     @Override
     public T convertFrom(final R in) {
         this.checkInited();
-        R objin = objectReader(in);
-        final String clazz = objin.readObjectB(typeClass);
+        final String clazz = in.readObjectB(typeClass);
         if (clazz == null) {
             return null;
         }
         if (!clazz.isEmpty()) {
-            return (T) factory.loadDecoder(factory.getEntityAlias(clazz)).convertFrom(objin);
+            return (T) factory.loadDecoder(factory.getEntityAlias(clazz)).convertFrom(in);
         }
         if (this.creator == null) {
             if (typeClass.isInterface() || Modifier.isAbstract(typeClass.getModifiers())) {
@@ -378,18 +377,17 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
         if (this.creatorConstructorMembers == null) { // 空构造函数
             final T result = this.creator == null ? null : this.creator.create();
             boolean first = true;
-            while (objin.hasNext()) {
-                DeMember member = objin.readFieldName(info);
-                objin.readBlank();
+            while (in.hasNext()) {
+                DeMember member = in.readFieldName(info);
+                in.readBlank();
                 if (member == null) {
-                    objin.skipValue(); // 跳过不存在的属性的值
+                    in.skipValue(); // 跳过不存在的属性的值
                 } else {
-                    readDeMemberValue(objin, member, result, first);
+                    readDeMemberValue(in, member, result, first);
                 }
                 first = false;
             }
-            objin.readObjectE(typeClass);
-            offerReader(in, objin);
+            in.readObjectE(typeClass);
             return result;
         } else { // 带参数的构造函数
             final DeMember<R, T, ?>[] constructorFields = this.creatorConstructorMembers;
@@ -397,13 +395,13 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
             final Object[][] otherParams = new Object[info.length()][2];
             int oc = 0;
             boolean first = true;
-            while (objin.hasNext()) {
-                DeMember member = objin.readFieldName(info);
-                objin.readBlank();
+            while (in.hasNext()) {
+                DeMember member = in.readFieldName(info);
+                in.readBlank();
                 if (member == null) {
-                    objin.skipValue(); // 跳过不存在的属性的值
+                    in.skipValue(); // 跳过不存在的属性的值
                 } else {
-                    Object val = readDeMemberValue(objin, member, first);
+                    Object val = readDeMemberValue(in, member, first);
                     boolean flag = true;
                     for (int i = 0; i < constructorFields.length; i++) {
                         if (member == constructorFields[i]) {
@@ -418,8 +416,7 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
                 }
                 first = false;
             }
-            objin.readObjectE(typeClass);
-            offerReader(in, objin);
+            in.readObjectE(typeClass);
             if (this.creator == null) {
                 return null;
             }
@@ -440,18 +437,6 @@ public class ObjectDecoder<R extends Reader, T> implements Decodeable<R, T> {
         // do nothing
     }
 
-    protected boolean hasNext(R in, boolean first) {
-        return in.hasNext();
-    }
-
-    protected R objectReader(R in) {
-        return in;
-    }
-
-    protected void offerReader(R parent, R out) {
-        // do nothing
-    }
-
     protected Object readDeMemberValue(R in, DeMember member, boolean first) {
         return member.read(in);
     }
diff --git a/src/main/java/org/redkale/convert/bson/BsonReader.java b/src/main/java/org/redkale/convert/bson/BsonReader.java
index a6b60202f..0f856de7a 100644
--- a/src/main/java/org/redkale/convert/bson/BsonReader.java
+++ b/src/main/java/org/redkale/convert/bson/BsonReader.java
@@ -7,9 +7,9 @@ package org.redkale.convert.bson;
 
 import java.nio.charset.StandardCharsets;
 import org.redkale.convert.*;
+import static org.redkale.convert.Reader.SIGN_NULL;
 import org.redkale.convert.ext.ByteSimpledCoder;
 import org.redkale.util.*;
-import static org.redkale.convert.Reader.SIGN_NULL;
 
 /**
  * BSON数据源
@@ -129,7 +129,6 @@ public class BsonReader extends Reader {
                 break;
             default:
                 Decodeable decoder = BsonFactory.typeEnum(val);
-                System.out.println("val = " + val + ", decoder = " + decoder);
                 if (decoder != null) {
                     decoder.convertFrom(this);
                 }
diff --git a/src/main/java/org/redkale/convert/json/JsonMultiImplDecoder.java b/src/main/java/org/redkale/convert/json/JsonMultiImplDecoder.java
index a9a30f475..823c65d99 100644
--- a/src/main/java/org/redkale/convert/json/JsonMultiImplDecoder.java
+++ b/src/main/java/org/redkale/convert/json/JsonMultiImplDecoder.java
@@ -47,7 +47,7 @@ public class JsonMultiImplDecoder<T> implements Decodeable<JsonReader, T> {
                 max = decoder.getMembers().length;
             }
             for (DeMember member : decoder.getMembers()) {
-                String name = member.getAttribute().field();
+                String name = member.getFieldName();
                 this.repeatFieldToDecoders.put(name, decoder);
                 fields[i].add(name);
                 Attribute t = fieldTypes.get(name);
@@ -164,7 +164,7 @@ public class JsonMultiImplDecoder<T> implements Decodeable<JsonReader, T> {
                 for (int j = 0; j < params.length; j++) {
                     if (params[j] != null
                             && params[j][0] != null
-                            && constructorFields[i].getAttribute().field().equals(((Attribute) params[j][0]).field())) {
+                            && constructorFields[i].getFieldName().equals(((Attribute) params[j][0]).field())) {
                         constructorParams[i] = params[j][1];
                         params[j] = null;
                         break;
diff --git a/src/main/java/org/redkale/convert/json/JsonReader.java b/src/main/java/org/redkale/convert/json/JsonReader.java
index a498278e9..7f18d0f99 100644
--- a/src/main/java/org/redkale/convert/json/JsonReader.java
+++ b/src/main/java/org/redkale/convert/json/JsonReader.java
@@ -44,7 +44,7 @@ public class JsonReader extends Reader {
     public JsonReader(char[] text, int start, int len) {
         this.text = Objects.requireNonNull(text);
         this.position = start - 1;
-        this.limit = start + len - 1;
+        this.limit = this.position + len;
     }
 
     public final JsonReader setText(String text) {
@@ -58,7 +58,7 @@ public class JsonReader extends Reader {
     public final JsonReader setText(char[] text, int start, int len) {
         this.text = text;
         this.position = start - 1;
-        this.limit = start + len - 1;
+        this.limit = this.position + len;
         return this;
     }
 
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufArrayDecoder.java b/src/main/java/org/redkale/convert/pb/ProtobufArrayDecoder.java
index b0dd8aade..c6168326d 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufArrayDecoder.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufArrayDecoder.java
@@ -27,26 +27,25 @@ public class ProtobufArrayDecoder<T> extends ArrayDecoder<ProtobufReader, T> {
     @Override
     public T[] convertFrom(ProtobufReader in, DeMember member) {
         this.checkInited();
+        final boolean simpled = this.componentSimpled;
         final Decodeable<ProtobufReader, T> itemDecoder = this.componentDecoder;
         in.readArrayB(member, itemDecoder);
-        int contentLength = in.readMemberContentLength(member, itemDecoder);
         final List<T> result = new ArrayList();
-        boolean first = true;
-        int startPosition = in.position();
-        while (in.hasNext(startPosition, contentLength)) {
-            ProtobufReader itemReader = getItemReader(in, member, first);
-            if (itemReader == null) { // 元素读取完毕
+        final int limit = in.limit();
+        while (in.hasNext()) {
+            ProtobufReader subin = in;
+            if (!simpled) {
+                int contentLen = in.readRawVarint32();
+                in.limit(in.position() + contentLen + 1);
+            }
+            result.add(itemDecoder.convertFrom(subin));
+            in.limit(limit);
+            if (!in.readNextTag(member)) { // 元素结束
                 break;
             }
-            result.add(itemDecoder.convertFrom(itemReader));
-            first = false;
         }
         in.readArrayE();
         T[] rs = this.componentArrayFunction.apply(result.size());
         return result.toArray(rs);
     }
-
-    protected ProtobufReader getItemReader(ProtobufReader in, DeMember member, boolean first) {
-        return ProtobufFactory.getItemReader(in, member, componentSimpled, first);
-    }
 }
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufCollectionDecoder.java b/src/main/java/org/redkale/convert/pb/ProtobufCollectionDecoder.java
index 4f779b2d2..153c7890f 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufCollectionDecoder.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufCollectionDecoder.java
@@ -25,25 +25,23 @@ public class ProtobufCollectionDecoder<T> extends CollectionDecoder<ProtobufRead
     @Override
     public Collection<T> convertFrom(ProtobufReader in, DeMember member) {
         this.checkInited();
+        final boolean simpled = !this.componentSimpled;
         final Decodeable<ProtobufReader, T> itemDecoder = this.componentDecoder;
         in.readArrayB(member, itemDecoder);
-        int contentLength = in.readMemberContentLength(member, itemDecoder);
         final Collection<T> result = this.creator.create();
-        boolean first = true;
-        int startPosition = in.position();
-        while (in.hasNext(startPosition, contentLength)) {
-            ProtobufReader itemReader = getItemReader(in, member, first);
-            if (itemReader == null) { // 元素读取完毕
+        final int limit = in.limit();
+        while (in.hasNext()) {
+            if (!simpled) {
+                int contentLen = in.readRawVarint32();
+                in.limit(in.position() + contentLen + 1);
+            }
+            result.add(itemDecoder.convertFrom(in));
+            in.limit(limit);
+            if (!in.readNextTag(member)) { // 元素结束
                 break;
             }
-            result.add(itemDecoder.convertFrom(itemReader));
-            first = false;
         }
         in.readArrayE();
         return result;
     }
-
-    protected ProtobufReader getItemReader(ProtobufReader in, DeMember member, boolean first) {
-        return ProtobufFactory.getItemReader(in, member, componentSimpled, first);
-    }
 }
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufConvert.java b/src/main/java/org/redkale/convert/pb/ProtobufConvert.java
index 51ef1f959..2ed74e752 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufConvert.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufConvert.java
@@ -240,7 +240,7 @@ public class ProtobufConvert extends BinaryConvert<ProtobufReader, ProtobufWrite
                             .append(ProtobufFactory.wireTypeString(
                                     member.getDecoder().getType(), ((ProtobufFactory) factory).enumtostring))
                             .append(" ")
-                            .append(member.getAttribute().field())
+                            .append(member.getFieldName())
                             .append("\" : ")
                             .append(member.getPosition())
                             .append(i == members.size() - 1 ? "\r\n" : ",\r\n");
@@ -389,7 +389,7 @@ public class ProtobufConvert extends BinaryConvert<ProtobufReader, ProtobufWrite
                             .append(ProtobufFactory.wireTypeString(
                                     member.getEncoder().getType(), ((ProtobufFactory) factory).enumtostring))
                             .append(" ")
-                            .append(member.getAttribute().field())
+                            .append(member.getFieldName())
                             .append("\" : ")
                             .append(member.getPosition())
                             .append(i == members.size() - 1 ? "\r\n" : ",\r\n");
@@ -541,7 +541,7 @@ public class ProtobufConvert extends BinaryConvert<ProtobufReader, ProtobufWrite
                             .append(ProtobufFactory.wireTypeString(
                                     member.getEncoder().getType(), ((ProtobufFactory) factory).enumtostring))
                             .append(" ")
-                            .append(member.getAttribute().field())
+                            .append(member.getFieldName())
                             .append(" = ")
                             .append(member.getPosition())
                             .append(member.getComment().isEmpty() ? ";\r\n" : ("; //" + member.getComment() + " \r\n"));
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufDynEncoder.java b/src/main/java/org/redkale/convert/pb/ProtobufDynEncoder.java
index 79feeffcf..942ce5342 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufDynEncoder.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufDynEncoder.java
@@ -8,8 +8,8 @@ import java.lang.reflect.*;
 import java.lang.reflect.Type;
 import java.util.*;
 import java.util.concurrent.atomic.*;
-import static org.redkale.asm.ClassWriter.COMPUTE_FRAMES;
 import org.redkale.asm.*;
+import static org.redkale.asm.ClassWriter.COMPUTE_FRAMES;
 import static org.redkale.asm.Opcodes.*;
 import org.redkale.convert.*;
 import org.redkale.util.*;
@@ -54,7 +54,7 @@ public abstract class ProtobufDynEncoder<T> extends ProtobufObjectEncoder<T> {
         final Map<String, EnMember> otherMembers = new HashMap<>();
         StringBuilder elementb = new StringBuilder();
         for (EnMember member : selfObjEncoder.getMembers()) {
-            final String fieldName = member.getAttribute().field();
+            final String fieldName = member.getFieldName();
             final Class fieldClass = member.getAttribute().type();
             final Type fieldType = member.getAttribute().genericType();
             elementb.append(fieldName).append(',');
@@ -172,7 +172,7 @@ public abstract class ProtobufDynEncoder<T> extends ProtobufObjectEncoder<T> {
             mv.visitMethodInsn(INVOKEVIRTUAL, pbwriterName, "writeObjectB", "(Ljava/lang/Object;)V", false);
 
             for (EnMember member : selfObjEncoder.getMembers()) {
-                final String fieldName = member.getAttribute().field();
+                final String fieldName = member.getFieldName();
                 final Type fieldType = member.getAttribute().genericType();
                 final Class fieldClass = member.getAttribute().type();
                 if (ProtobufFactory.isSimpleType(fieldClass)) {
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufFactory.java b/src/main/java/org/redkale/convert/pb/ProtobufFactory.java
index 5490e0616..5fe0bf1cc 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufFactory.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufFactory.java
@@ -303,44 +303,6 @@ public class ProtobufFactory extends ConvertFactory<ProtobufReader, ProtobufWrit
         return true;
     }
 
-    protected static ProtobufReader getItemReader(ProtobufReader in, DeMember member, boolean simpled, boolean first) {
-        if (simpled) {
-            if (member == null || first) {
-                return in;
-            }
-            int tag = in.readTag();
-            if (tag != member.getTag()) { // 元素结束
-                in.backTag(tag);
-                return null;
-            }
-            return in;
-        } else {
-            if (!first && member != null) {
-                int tag = in.readTag();
-                if (tag != member.getTag()) { // 元素结束
-                    in.backTag(tag);
-                    return null;
-                }
-            }
-            byte[] bs = in.readByteArray();
-            return new ProtobufReader(bs);
-        }
-    }
-
-    protected static boolean isNoLenBytesType(Type type) {
-        return (type instanceof Class && ((Class) type).isPrimitive())
-                || type == Boolean.class
-                || type == Byte.class
-                || type == Short.class
-                || type == Character.class
-                || type == Integer.class
-                || type == Float.class
-                || type == Long.class
-                || type == Double.class
-                || type == AtomicInteger.class
-                || type == AtomicLong.class;
-    }
-
     protected static boolean isSimpleType(Class fieldClass) {
         return fieldClass.isPrimitive()
                 || fieldClass == Boolean.class
@@ -476,23 +438,21 @@ public class ProtobufFactory extends ConvertFactory<ProtobufReader, ProtobufWrit
     public static int wireType(Type javaType, boolean enumtostring) {
         if (javaType == double.class || javaType == Double.class) {
             return 1;
-        }
-        if (javaType == float.class || javaType == Float.class) {
+        } else if (javaType == float.class || javaType == Float.class) {
             return 5;
-        }
-        if (javaType == boolean.class || javaType == Boolean.class) {
+        } else if ((javaType == boolean.class || javaType == Boolean.class)
+                || (javaType == byte.class || javaType == Byte.class)
+                || (javaType == char.class || javaType == Character.class)
+                || (javaType == short.class || javaType == Short.class)
+                || (javaType == int.class || javaType == Integer.class)
+                || (javaType == long.class || javaType == Long.class)
+                || (javaType == AtomicInteger.class || javaType == AtomicLong.class)) {
             return 0;
+        } else if (!enumtostring && (javaType instanceof Class) && ((Class) javaType).isEnum()) {
+            return 0;
+        } else { // byte[]
+            return 2;
         }
-        if (javaType instanceof Class) {
-            Class javaClazz = (Class) javaType;
-            if (javaClazz.isEnum()) {
-                return enumtostring ? 2 : 0;
-            }
-            if (javaClazz.isPrimitive() || Number.class.isAssignableFrom(javaClazz)) {
-                return 0;
-            }
-        }
-        return 2;
     }
 
     public static String wireTypeString(Type javaType, boolean enumtostring) {
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufMapDecoder.java b/src/main/java/org/redkale/convert/pb/ProtobufMapDecoder.java
index 0a1f98992..5b3a63252 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufMapDecoder.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufMapDecoder.java
@@ -28,34 +28,23 @@ public class ProtobufMapDecoder<K, V> extends MapDecoder<ProtobufReader, K, V> {
         this.checkInited();
         in.readMapB(member, this.keyDecoder, this.valueDecoder);
         final Map<K, V> result = this.creator.create();
-        boolean first = true;
         Decodeable<ProtobufReader, K> kdecoder = this.keyDecoder;
         Decodeable<ProtobufReader, V> vdecoder = this.valueDecoder;
+        final int limit = in.limit();
         while (in.hasNext()) {
-            ProtobufReader entryReader = getEntryReader(in, member, first);
-            if (entryReader == null) {
+            int contentLen = in.readRawVarint32();
+            in.limit(in.position() + contentLen + 1);
+            in.readTag();
+            K key = kdecoder.convertFrom(in);
+            in.readTag();
+            V value = vdecoder.convertFrom(in);
+            result.put(key, value);
+            in.limit(limit);
+            if (!in.readNextTag(member)) { // 元素结束
                 break;
             }
-            entryReader.readTag();
-            K key = kdecoder.convertFrom(entryReader);
-            entryReader.readTag();
-            V value = vdecoder.convertFrom(entryReader);
-            result.put(key, value);
-            first = false;
         }
         in.readMapE();
         return result;
     }
-
-    protected ProtobufReader getEntryReader(ProtobufReader in, DeMember member, boolean first) {
-        if (!first && member != null) {
-            int tag = in.readTag();
-            if (tag != member.getTag()) {
-                in.backTag(tag);
-                return null;
-            }
-        }
-        byte[] bs = in.readByteArray();
-        return new ProtobufReader(bs);
-    }
 }
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufObjectDecoder.java b/src/main/java/org/redkale/convert/pb/ProtobufObjectDecoder.java
index 3ac80f0aa..f787f5cf1 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufObjectDecoder.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufObjectDecoder.java
@@ -13,12 +13,27 @@ import org.redkale.util.*;
  * @author zhangjx
  * @param <T> T
  */
-public class ProtobufObjectDecoder<T> extends ObjectDecoder<ProtobufReader, T> {
+public class ProtobufObjectDecoder<T> extends ObjectDecoder<ProtobufReader, T>
+        implements TagDecodeable<ProtobufReader, T> {
 
     protected ProtobufObjectDecoder(Type type) {
         super(type);
     }
 
+    @Override
+    public T convertFrom(ProtobufReader in, DeMember member) {
+        if (member == null) {
+            return super.convertFrom(in);
+        } else {
+            final int limit = in.limit();
+            int contentLen = in.readRawVarint32();
+            in.limit(in.position() + contentLen + 1);
+            T result = super.convertFrom(in);
+            in.limit(limit);
+            return result;
+        }
+    }
+
     @Override
     protected void initForEachDeMember(ConvertFactory factory, DeMember member) {
         if (member.getIndex() < 1) {
@@ -30,19 +45,6 @@ public class ProtobufObjectDecoder<T> extends ObjectDecoder<ProtobufReader, T> {
         setTag(member, ProtobufFactory.getTag(attr.field(), attr.genericType(), member.getPosition(), enumtostring));
     }
 
-    @Override
-    protected ProtobufReader objectReader(ProtobufReader in) {
-        if (in.position() > in.initoffset) {
-            return new ProtobufReader(in.readByteArray());
-        }
-        return in;
-    }
-
-    @Override
-    protected boolean hasNext(ProtobufReader in, boolean first) {
-        return in.hasNext();
-    }
-
     @Override
     protected Object readDeMemberValue(ProtobufReader in, DeMember member, boolean first) {
         Decodeable decoder = member.getDecoder();
@@ -62,4 +64,5 @@ public class ProtobufObjectDecoder<T> extends ObjectDecoder<ProtobufReader, T> {
             member.read(in, result);
         }
     }
+
 }
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufReader.java b/src/main/java/org/redkale/convert/pb/ProtobufReader.java
index ac8c2c808..151678017 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufReader.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufReader.java
@@ -16,9 +16,11 @@ public class ProtobufReader extends Reader {
 
     protected int position = -1;
 
-    protected int initoffset;
+    protected byte[] content;
 
-    private byte[] content;
+    //protected int initoffset;
+
+    protected int limit;
 
     protected int cacheTag = Integer.MIN_VALUE;
 
@@ -49,7 +51,8 @@ public class ProtobufReader extends Reader {
     public final void setBytes(byte[] bytes) {
         if (bytes == null) {
             this.position = 0;
-            this.initoffset = 0;
+            //this.initoffset = 0;
+            this.limit = 0;
         } else {
             setBytes(bytes, 0, bytes.length);
         }
@@ -58,17 +61,28 @@ public class ProtobufReader extends Reader {
     public final void setBytes(byte[] bytes, int start, int len) {
         if (bytes == null) {
             this.position = 0;
-            this.initoffset = 0;
+            //this.initoffset = 0;
+            this.limit = 0;
         } else {
             this.content = bytes;
             this.position = start - 1;
-            this.initoffset = this.position;
+            this.limit = start + len;
+            //this.initoffset = this.position;
         }
     }
 
+    public void limit(int limit) {
+        this.limit = limit;
+    }
+
+    public int limit() {
+        return this.limit;
+    }
+
     protected boolean recycle() {
         this.position = -1;
-        this.initoffset = -1;
+        this.limit = -1;
+        //this.initoffset = -1;
         this.content = null;
         return true;
     }
@@ -78,11 +92,12 @@ public class ProtobufReader extends Reader {
         return this;
     }
 
+    // 通常用于尾部解析
     public byte[] remainBytes() {
-        if (this.position >= this.content.length) {
+        if (this.position >= this.limit) {
             return new byte[0];
         }
-        return Arrays.copyOfRange(this.content, this.position + 1, this.content.length);
+        return Arrays.copyOfRange(this.content, this.position + 1, this.limit);
     }
 
     /** 跳过属性的值 */
@@ -113,7 +128,7 @@ public class ProtobufReader extends Reader {
 
     @Override
     public final String readObjectB(final Class clazz) {
-        return (this.position + 1) < this.content.length ? "" : null;
+        return (this.position + 1) < this.limit ? "" : null;
     }
 
     @Override
@@ -159,13 +174,6 @@ public class ProtobufReader extends Reader {
         return this.position;
     }
 
-    public final int readMemberContentLength(DeMember member, Decodeable decoder) {
-        if (member == null && decoder == null) {
-            return -1; // 为byte[]
-        }
-        return member != null ? -1 : readRawVarint32(); // readUInt32
-    }
-
     @Override
     public final DeMember readFieldName(final DeMemberInfo memberInfo) {
         int tag = readTag();
@@ -452,6 +460,18 @@ public class ProtobufReader extends Reader {
         return val;
     }
 
+    public boolean readNextTag(DeMember member) {
+        if (!hasNext()) {
+            return false;
+        }
+        int tag = readTag();
+        if (tag != member.getTag()) { // 元素结束
+            backTag(tag);
+            return false;
+        }
+        return true;
+    }
+
     protected final int readTag() {
         if (cacheTag != Integer.MIN_VALUE) {
             int tag = cacheTag;
@@ -471,22 +491,7 @@ public class ProtobufReader extends Reader {
 
     @Override
     public boolean hasNext() {
-        return (this.position + 1) < this.content.length;
-    }
-
-    /**
-     * 判断对象是否存在下一个属性或者数组是否存在下一个元素
-     *
-     * @param startPosition 起始位置
-     * @param contentLength 内容大小， 不确定的传-1
-     * @return 是否存在
-     */
-    public boolean hasNext(int startPosition, int contentLength) {
-        // ("-------------: " + startPosition + ", " + contentLength + ", " + this.position);
-        if (startPosition >= 0 && contentLength >= 0) {
-            return (this.position) < (startPosition + contentLength);
-        }
-        return (this.position + 1) < this.content.length;
+        return (this.position + 1) < this.limit;
     }
 
     @Override
@@ -503,7 +508,7 @@ public class ProtobufReader extends Reader {
         fastpath:
         {
             int curr = this.position;
-            if ((curr + 1) == data.length) {
+            if ((curr + 1) == limit) {
                 break fastpath;
             }
 
@@ -511,7 +516,7 @@ public class ProtobufReader extends Reader {
             if ((x = data[++curr]) >= 0) {
                 this.position = curr;
                 return x;
-            } else if (data.length - (curr + 1) < 9) {
+            } else if (limit - (curr + 1) < 9) {
                 break fastpath;
             } else if ((x ^= (data[++curr] << 7)) < 0) {
                 x ^= (~0 << 7);
@@ -543,7 +548,7 @@ public class ProtobufReader extends Reader {
         fastpath:
         {
             int curr = this.position;
-            if ((curr + 1) == data.length) {
+            if ((curr + 1) == this.limit) {
                 break fastpath;
             }
 
@@ -552,7 +557,7 @@ public class ProtobufReader extends Reader {
             if ((y = data[++curr]) >= 0) {
                 this.position = curr;
                 return y;
-            } else if (data.length - (curr + 1) < 9) {
+            } else if (this.limit - (curr + 1) < 9) {
                 break fastpath;
             } else if ((y ^= (data[++curr] << 7)) < 0) {
                 x = y ^ (~0 << 7);
diff --git a/src/main/java/org/redkale/convert/pb/ProtobufStreamDecoder.java b/src/main/java/org/redkale/convert/pb/ProtobufStreamDecoder.java
index 3bbec0285..fc694c134 100644
--- a/src/main/java/org/redkale/convert/pb/ProtobufStreamDecoder.java
+++ b/src/main/java/org/redkale/convert/pb/ProtobufStreamDecoder.java
@@ -26,25 +26,23 @@ public class ProtobufStreamDecoder<T> extends StreamDecoder<ProtobufReader, T> {
     @Override
     public Stream<T> convertFrom(ProtobufReader in, DeMember member) {
         this.checkInited();
+        final boolean simpled = !this.componentSimpled;
         final Decodeable<ProtobufReader, T> itemDecoder = this.componentDecoder;
         in.readArrayB(member, itemDecoder);
-        int contentLength = in.readMemberContentLength(member, itemDecoder);
         final List<T> result = new ArrayList();
-        boolean first = true;
-        int startPosition = in.position();
-        while (in.hasNext(startPosition, contentLength)) {
-            ProtobufReader itemReader = getItemReader(in, member, first);
-            if (itemReader == null) { // 元素读取完毕
+        final int limit = in.limit();
+        while (in.hasNext()) {
+            if (!simpled) {
+                int contentLen = in.readRawVarint32();
+                in.limit(in.position() + contentLen + 1);
+            }
+            result.add(itemDecoder.convertFrom(in));
+            in.limit(limit);
+            if (!in.readNextTag(member)) { // 元素结束
                 break;
             }
-            result.add(itemDecoder.convertFrom(itemReader));
-            first = false;
         }
         in.readArrayE();
         return result.stream();
     }
-
-    protected ProtobufReader getItemReader(ProtobufReader in, DeMember member, boolean first) {
-        return ProtobufFactory.getItemReader(in, member, componentSimpled, first);
-    }
 }
diff --git a/src/main/java/org/redkale/util/Utility.java b/src/main/java/org/redkale/util/Utility.java
index 81e8d69ca..9701cbb68 100644
--- a/src/main/java/org/redkale/util/Utility.java
+++ b/src/main/java/org/redkale/util/Utility.java
@@ -3562,6 +3562,18 @@ public final class Utility {
      * @param bytes 字节数组
      */
     public static void println(String string, byte... bytes) {
+        println(string, bytes, 0, bytes.length);
+    }
+
+    /**
+     * 将字节数组的内容转换成字符串并打印到控制台, string参数不为空时会追加在字节数组内容字符串之前
+     *
+     * @param string 字符串前缀
+     * @param bytes 字节数组
+     * @param start 起始位置
+     * @param len 长度
+     */
+    public static void println(String string, byte[] bytes, int start, int len) {
         if (bytes == null) {
             return;
         }
@@ -3569,9 +3581,10 @@ public final class Utility {
         if (string != null) {
             sb.append(string);
         }
-        sb.append(bytes.length).append(".[");
+        sb.append(len).append(".[");
         boolean last = false;
-        for (byte b : bytes) {
+        for (int i = 0; i < len; i++) {
+            byte b = bytes[start + i];
             if (last) {
                 sb.append(',');
             }