diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index c8a76d7..4f4d9f7 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -39,10 +39,20 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: 1.16
-      - name: checkout
+      - name: checkout ( feature )
         uses: actions/checkout@v2
-      - name: run benchmark
-        run: cd benchmarks && go test -bench .
+      - name: run benchmark ( feature )
+        run: cd benchmarks && go test -bench GoJson | tee $HOME/new.txt
+      - name: install benchcmp
+        run: go get -u golang.org/x/tools/cmd/benchcmp
+      - name: checkout ( master )
+        uses: actions/checkout@v2
+        with:
+          ref: master
+      - name: run benchmark ( master )
+        run: cd benchmarks && go test -bench GoJson | tee $HOME/old.txt
+      - name: compare benchmark results
+        run: benchcmp $HOME/old.txt $HOME/new.txt
   coverage:
     name: Coverage
     runs-on: ubuntu-latest
diff --git a/decode_array.go b/decode_array.go
index 92b9dd9..508f097 100644
--- a/decode_array.go
+++ b/decode_array.go
@@ -95,24 +95,14 @@ func (d *arrayDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer)
 		return 0, errExceededMaxDepth(buf[cursor], cursor)
 	}
 
-	buflen := int64(len(buf))
-	for ; cursor < buflen; cursor++ {
+	for {
 		switch buf[cursor] {
 		case ' ', '\n', '\t', '\r':
+			cursor++
 			continue
 		case 'n':
-			buflen := int64(len(buf))
-			if cursor+3 >= buflen {
-				return 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return 0, err
 			}
 			cursor += 4
 			return cursor, nil
@@ -149,7 +139,8 @@ func (d *arrayDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer)
 					return 0, errInvalidCharacter(buf[cursor], "array", cursor)
 				}
 			}
+		default:
+			return 0, errUnexpectedEndOfJSON("array", cursor)
 		}
 	}
-	return 0, errUnexpectedEndOfJSON("array", cursor)
 }
diff --git a/decode_bool.go b/decode_bool.go
index d818896..9efc1c1 100644
--- a/decode_bool.go
+++ b/decode_bool.go
@@ -47,56 +47,25 @@ ERROR:
 }
 
 func (d *boolDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer) (int64, error) {
-	buflen := int64(len(buf))
 	cursor = skipWhiteSpace(buf, cursor)
 	switch buf[cursor] {
 	case 't':
-		if cursor+3 >= buflen {
-			return 0, errUnexpectedEndOfJSON("bool(true)", cursor)
-		}
-		if buf[cursor+1] != 'r' {
-			return 0, errInvalidCharacter(buf[cursor+1], "bool(true)", cursor)
-		}
-		if buf[cursor+2] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+2], "bool(true)", cursor)
-		}
-		if buf[cursor+3] != 'e' {
-			return 0, errInvalidCharacter(buf[cursor+3], "bool(true)", cursor)
+		if err := validateTrue(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 4
 		**(**bool)(unsafe.Pointer(&p)) = true
 		return cursor, nil
 	case 'f':
-		if cursor+4 >= buflen {
-			return 0, errUnexpectedEndOfJSON("bool(false)", cursor)
-		}
-		if buf[cursor+1] != 'a' {
-			return 0, errInvalidCharacter(buf[cursor+1], "bool(false)", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "bool(false)", cursor)
-		}
-		if buf[cursor+3] != 's' {
-			return 0, errInvalidCharacter(buf[cursor+3], "bool(false)", cursor)
-		}
-		if buf[cursor+4] != 'e' {
-			return 0, errInvalidCharacter(buf[cursor+4], "bool(false)", cursor)
+		if err := validateFalse(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 5
 		**(**bool)(unsafe.Pointer(&p)) = false
 		return cursor, nil
 	case 'n':
-		if cursor+3 >= buflen {
-			return 0, errUnexpectedEndOfJSON("null", cursor)
-		}
-		if buf[cursor+1] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-		}
-		if buf[cursor+3] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+		if err := validateNull(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 4
 		return cursor, nil
diff --git a/decode_bytes.go b/decode_bytes.go
index b5e34a3..e0b8b8a 100644
--- a/decode_bytes.go
+++ b/decode_bytes.go
@@ -166,9 +166,7 @@ func (d *bytesDecoder) decodeBinary(buf []byte, cursor, depth int64, p unsafe.Po
 			cursor += 4
 			return nil, cursor, nil
 		default:
-			goto ERROR
+			return nil, 0, errNotAtBeginningOfValue(cursor)
 		}
 	}
-ERROR:
-	return nil, 0, errNotAtBeginningOfValue(cursor)
 }
diff --git a/decode_context.go b/decode_context.go
index 38ab7c8..a6ff091 100644
--- a/decode_context.go
+++ b/decode_context.go
@@ -153,37 +153,14 @@ func skipValue(buf []byte, cursor, depth int64) (int64, error) {
 			}
 			return cursor, nil
 		case 't':
-			buflen := int64(len(buf))
-			if cursor+3 >= buflen {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+1] != 'r' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+2] != 'u' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+3] != 'e' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
+			if err := validateTrue(buf, cursor); err != nil {
+				return 0, err
 			}
 			cursor += 4
 			return cursor, nil
 		case 'f':
-			buflen := int64(len(buf))
-			if cursor+4 >= buflen {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+1] != 'a' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+3] != 's' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
-			}
-			if buf[cursor+4] != 'e' {
-				return 0, errUnexpectedEndOfJSON("bool of object", cursor)
+			if err := validateFalse(buf, cursor); err != nil {
+				return 0, err
 			}
 			cursor += 5
 			return cursor, nil
@@ -199,6 +176,41 @@ func skipValue(buf []byte, cursor, depth int64) (int64, error) {
 	}
 }
 
+func validateTrue(buf []byte, cursor int64) error {
+	if cursor+3 >= int64(len(buf)) {
+		return errUnexpectedEndOfJSON("true", cursor)
+	}
+	if buf[cursor+1] != 'r' {
+		return errInvalidCharacter(buf[cursor+1], "true", cursor)
+	}
+	if buf[cursor+2] != 'u' {
+		return errInvalidCharacter(buf[cursor+2], "true", cursor)
+	}
+	if buf[cursor+3] != 'e' {
+		return errInvalidCharacter(buf[cursor+3], "true", cursor)
+	}
+	return nil
+}
+
+func validateFalse(buf []byte, cursor int64) error {
+	if cursor+4 >= int64(len(buf)) {
+		return errUnexpectedEndOfJSON("false", cursor)
+	}
+	if buf[cursor+1] != 'a' {
+		return errInvalidCharacter(buf[cursor+1], "false", cursor)
+	}
+	if buf[cursor+2] != 'l' {
+		return errInvalidCharacter(buf[cursor+2], "false", cursor)
+	}
+	if buf[cursor+3] != 's' {
+		return errInvalidCharacter(buf[cursor+3], "false", cursor)
+	}
+	if buf[cursor+4] != 'e' {
+		return errInvalidCharacter(buf[cursor+4], "false", cursor)
+	}
+	return nil
+}
+
 func validateNull(buf []byte, cursor int64) error {
 	if cursor+3 >= int64(len(buf)) {
 		return errUnexpectedEndOfJSON("null", cursor)
diff --git a/decode_float.go b/decode_float.go
index 6c2a390..d48c2c8 100644
--- a/decode_float.go
+++ b/decode_float.go
@@ -91,34 +91,22 @@ ERROR:
 }
 
 func (d *floatDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error) {
-	buflen := int64(len(buf))
-	for ; cursor < buflen; cursor++ {
+	for {
 		switch buf[cursor] {
 		case ' ', '\n', '\t', '\r':
+			cursor++
 			continue
 		case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := cursor
 			cursor++
-			for ; cursor < buflen; cursor++ {
-				if floatTable[buf[cursor]] {
-					continue
-				}
-				break
+			for floatTable[buf[cursor]] {
+				cursor++
 			}
 			num := buf[start:cursor]
 			return num, cursor, nil
 		case 'n':
-			if cursor+3 >= buflen {
-				return nil, 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return nil, 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return nil, 0, err
 			}
 			cursor += 4
 			return nil, cursor, nil
@@ -126,7 +114,6 @@ func (d *floatDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, erro
 			return nil, 0, errUnexpectedEndOfJSON("float", cursor)
 		}
 	}
-	return nil, 0, errUnexpectedEndOfJSON("float", cursor)
 }
 
 func (d *floatDecoder) decodeStream(s *stream, depth int64, p unsafe.Pointer) error {
diff --git a/decode_int.go b/decode_int.go
index 8db98a9..625cc06 100644
--- a/decode_int.go
+++ b/decode_int.go
@@ -154,26 +154,14 @@ func (d *intDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error)
 		case '-', '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := cursor
 			cursor++
-		LOOP:
-			if numTable[char(b, cursor)] {
+			for numTable[char(b, cursor)] {
 				cursor++
-				goto LOOP
 			}
 			num := buf[start:cursor]
 			return num, cursor, nil
 		case 'n':
-			buflen := int64(len(buf))
-			if cursor+3 >= buflen {
-				return nil, 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return nil, 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return nil, 0, err
 			}
 			cursor += 4
 			return nil, cursor, nil
diff --git a/decode_interface.go b/decode_interface.go
index fee2cdb..e7e96b8 100644
--- a/decode_interface.go
+++ b/decode_interface.go
@@ -385,52 +385,22 @@ func (d *interfaceDecoder) decodeEmptyInterface(buf []byte, cursor, depth int64,
 		**(**interface{})(unsafe.Pointer(&p)) = v
 		return cursor, nil
 	case 't':
-		if cursor+3 >= int64(len(buf)) {
-			return 0, errUnexpectedEndOfJSON("bool(true)", cursor)
-		}
-		if buf[cursor+1] != 'r' {
-			return 0, errInvalidCharacter(buf[cursor+1], "bool(true)", cursor)
-		}
-		if buf[cursor+2] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+2], "bool(true)", cursor)
-		}
-		if buf[cursor+3] != 'e' {
-			return 0, errInvalidCharacter(buf[cursor+3], "bool(true)", cursor)
+		if err := validateTrue(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 4
 		**(**interface{})(unsafe.Pointer(&p)) = true
 		return cursor, nil
 	case 'f':
-		if cursor+4 >= int64(len(buf)) {
-			return 0, errUnexpectedEndOfJSON("bool(false)", cursor)
-		}
-		if buf[cursor+1] != 'a' {
-			return 0, errInvalidCharacter(buf[cursor+1], "bool(false)", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "bool(false)", cursor)
-		}
-		if buf[cursor+3] != 's' {
-			return 0, errInvalidCharacter(buf[cursor+3], "bool(false)", cursor)
-		}
-		if buf[cursor+4] != 'e' {
-			return 0, errInvalidCharacter(buf[cursor+4], "bool(false)", cursor)
+		if err := validateFalse(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 5
 		**(**interface{})(unsafe.Pointer(&p)) = false
 		return cursor, nil
 	case 'n':
-		if cursor+3 >= int64(len(buf)) {
-			return 0, errUnexpectedEndOfJSON("null", cursor)
-		}
-		if buf[cursor+1] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-		}
-		if buf[cursor+3] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+		if err := validateNull(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 4
 		**(**interface{})(unsafe.Pointer(&p)) = nil
diff --git a/decode_map.go b/decode_map.go
index a3fa291..91af50e 100644
--- a/decode_map.go
+++ b/decode_map.go
@@ -102,17 +102,8 @@ func (d *mapDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer) (
 	}
 	switch buf[cursor] {
 	case 'n':
-		if cursor+3 >= buflen {
-			return 0, errUnexpectedEndOfJSON("null", cursor)
-		}
-		if buf[cursor+1] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-		}
-		if buf[cursor+3] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+		if err := validateNull(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 4
 		**(**unsafe.Pointer)(unsafe.Pointer(&p)) = nil
diff --git a/decode_number.go b/decode_number.go
index 07022f8..6c8720b 100644
--- a/decode_number.go
+++ b/decode_number.go
@@ -77,34 +77,22 @@ ERROR:
 }
 
 func (d *numberDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error) {
-	buflen := int64(len(buf))
-	for ; cursor < buflen; cursor++ {
+	for {
 		switch buf[cursor] {
 		case ' ', '\n', '\t', '\r':
+			cursor++
 			continue
 		case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := cursor
 			cursor++
-			for ; cursor < buflen; cursor++ {
-				if floatTable[buf[cursor]] {
-					continue
-				}
-				break
+			for floatTable[buf[cursor]] {
+				cursor++
 			}
 			num := buf[start:cursor]
 			return num, cursor, nil
 		case 'n':
-			if cursor+3 >= buflen {
-				return nil, 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return nil, 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return nil, 0, err
 			}
 			cursor += 4
 			return nil, cursor, nil
@@ -114,5 +102,4 @@ func (d *numberDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, err
 			return nil, 0, errUnexpectedEndOfJSON("json.Number", cursor)
 		}
 	}
-	return nil, 0, errUnexpectedEndOfJSON("json.Number", cursor)
 }
diff --git a/decode_ptr.go b/decode_ptr.go
index ac4af6f..40997c5 100644
--- a/decode_ptr.go
+++ b/decode_ptr.go
@@ -60,18 +60,8 @@ func (d *ptrDecoder) decodeStream(s *stream, depth int64, p unsafe.Pointer) erro
 func (d *ptrDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer) (int64, error) {
 	cursor = skipWhiteSpace(buf, cursor)
 	if buf[cursor] == 'n' {
-		buflen := int64(len(buf))
-		if cursor+3 >= buflen {
-			return 0, errUnexpectedEndOfJSON("null", cursor)
-		}
-		if buf[cursor+1] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-		}
-		if buf[cursor+3] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+		if err := validateNull(buf, cursor); err != nil {
+			return 0, err
 		}
 		if p != nil {
 			*(*unsafe.Pointer)(p) = nil
diff --git a/decode_slice.go b/decode_slice.go
index df79aab..b546c49 100644
--- a/decode_slice.go
+++ b/decode_slice.go
@@ -186,24 +186,14 @@ func (d *sliceDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer)
 		return 0, errExceededMaxDepth(buf[cursor], cursor)
 	}
 
-	buflen := int64(len(buf))
-	for ; cursor < buflen; cursor++ {
+	for {
 		switch buf[cursor] {
 		case ' ', '\n', '\t', '\r':
+			cursor++
 			continue
 		case 'n':
-			buflen := int64(len(buf))
-			if cursor+3 >= buflen {
-				return 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return 0, err
 			}
 			cursor += 4
 			*(*unsafe.Pointer)(p) = nil
@@ -274,9 +264,7 @@ func (d *sliceDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer)
 		case '-', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			return 0, d.errNumber(cursor)
 		default:
-			goto ERROR
+			return 0, errUnexpectedEndOfJSON("slice", cursor)
 		}
 	}
-ERROR:
-	return 0, errUnexpectedEndOfJSON("slice", cursor)
 }
diff --git a/decode_string.go b/decode_string.go
index 8f1b0e5..3ca1710 100644
--- a/decode_string.go
+++ b/decode_string.go
@@ -343,25 +343,13 @@ func (d *stringDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, err
 				cursor++
 			}
 		case 'n':
-			buflen := int64(len(buf))
-			if cursor+3 >= buflen {
-				return nil, 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return nil, 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return nil, 0, err
 			}
 			cursor += 4
 			return nil, cursor, nil
 		default:
-			goto ERROR
+			return nil, 0, errNotAtBeginningOfValue(cursor)
 		}
 	}
-ERROR:
-	return nil, 0, errNotAtBeginningOfValue(cursor)
 }
diff --git a/decode_struct.go b/decode_struct.go
index da32d6f..f857bfc 100644
--- a/decode_struct.go
+++ b/decode_struct.go
@@ -566,17 +566,8 @@ func (d *structDecoder) decode(buf []byte, cursor, depth int64, p unsafe.Pointer
 	b := (*sliceHeader)(unsafe.Pointer(&buf)).data
 	switch char(b, cursor) {
 	case 'n':
-		if cursor+3 >= buflen {
-			return 0, errUnexpectedEndOfJSON("null", cursor)
-		}
-		if buf[cursor+1] != 'u' {
-			return 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-		}
-		if buf[cursor+2] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-		}
-		if buf[cursor+3] != 'l' {
-			return 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+		if err := validateNull(buf, cursor); err != nil {
+			return 0, err
 		}
 		cursor += 4
 		return cursor, nil
diff --git a/decode_test.go b/decode_test.go
index bcdff45..cdacbc5 100644
--- a/decode_test.go
+++ b/decode_test.go
@@ -1147,7 +1147,7 @@ var unmarshalTests = []unmarshalTest{
 	{in: `{"B":"true"}`, ptr: new(B), out: B{true}, golden: true},                                                               // 127
 	{in: `{"B":"false"}`, ptr: new(B), out: B{false}, golden: true},                                                             // 128
 	{in: `{"B": "maybe"}`, ptr: new(B), err: errors.New(`json: bool unexpected end of JSON input`)},                             // 129
-	{in: `{"B": "tru"}`, ptr: new(B), err: errors.New(`json: invalid character as bool(true)`)},                                 // 130
+	{in: `{"B": "tru"}`, ptr: new(B), err: errors.New(`json: invalid character as true`)},                                       // 130
 	{in: `{"B": "False"}`, ptr: new(B), err: errors.New(`json: bool unexpected end of JSON input`)},                             // 131
 	{in: `{"B": "null"}`, ptr: new(B), out: B{false}},                                                                           // 132
 	{in: `{"B": "nul"}`, ptr: new(B), err: errors.New(`json: invalid character as null`)},                                       // 133
diff --git a/decode_uint.go b/decode_uint.go
index 2d06e06..91a0004 100644
--- a/decode_uint.go
+++ b/decode_uint.go
@@ -97,10 +97,10 @@ func (d *uintDecoder) decodeStreamByte(s *stream) ([]byte, error) {
 }
 
 func (d *uintDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error) {
-	buflen := int64(len(buf))
-	for ; cursor < buflen; cursor++ {
+	for {
 		switch buf[cursor] {
 		case ' ', '\n', '\t', '\r':
+			cursor++
 			continue
 		case '0':
 			cursor++
@@ -108,27 +108,14 @@ func (d *uintDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error
 		case '1', '2', '3', '4', '5', '6', '7', '8', '9':
 			start := cursor
 			cursor++
-			for ; cursor < buflen; cursor++ {
-				tk := int(buf[cursor])
-				if int('0') <= tk && tk <= int('9') {
-					continue
-				}
-				break
+			for numTable[buf[cursor]] {
+				cursor++
 			}
 			num := buf[start:cursor]
 			return num, cursor, nil
 		case 'n':
-			if cursor+3 >= buflen {
-				return nil, 0, errUnexpectedEndOfJSON("null", cursor)
-			}
-			if buf[cursor+1] != 'u' {
-				return nil, 0, errInvalidCharacter(buf[cursor+1], "null", cursor)
-			}
-			if buf[cursor+2] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+2], "null", cursor)
-			}
-			if buf[cursor+3] != 'l' {
-				return nil, 0, errInvalidCharacter(buf[cursor+3], "null", cursor)
+			if err := validateNull(buf, cursor); err != nil {
+				return nil, 0, err
 			}
 			cursor += 4
 			return nil, cursor, nil
@@ -136,7 +123,6 @@ func (d *uintDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error
 			return nil, 0, d.typeError([]byte{buf[cursor]}, cursor)
 		}
 	}
-	return nil, 0, errUnexpectedEndOfJSON("number(unsigned integer)", cursor)
 }
 
 func (d *uintDecoder) decodeStream(s *stream, depth int64, p unsafe.Pointer) error {