diff --git a/api.go b/api.go
index 0c8aa79..a3dba54 100644
--- a/api.go
+++ b/api.go
@@ -18,6 +18,8 @@ package sonic
 
 import (
     `io`
+
+    `github.com/bytedance/sonic/ast`
 )
 
 // Config is a combination of sonic/encoder.Options and sonic/decoder.Options
@@ -161,3 +163,19 @@ func Unmarshal(buf []byte, val interface{}) error {
 func UnmarshalString(buf string, val interface{}) error {
     return ConfigDefault.UnmarshalFromString(buf, val)
 }
+
+// Get searches the given path json,
+// and returns its representing ast.Node.
+//
+// Each path arg must be integer or string:
+//     - Integer means searching current node as array
+//     - String means searching current node as object
+func Get(src []byte, path ...interface{}) (ast.Node, error) {
+    return GetFromString(string(src), path...)
+}
+
+// GetFromString is same with Get except src is string,
+// which can reduce unnecessary memory copy.
+func GetFromString(src string, path ...interface{}) (ast.Node, error) {
+    return ast.NewSearcher(src).GetByPath(path...)
+}
\ No newline at end of file
diff --git a/compat.go b/compat.go
index 48a1717..11733ba 100644
--- a/compat.go
+++ b/compat.go
@@ -38,7 +38,7 @@ func (cfg Config) Froze() API {
     return api
 }
 
-func (cfg *frozenConfig) marshalOptions(val interface{}, prefix, indent string) ([]byte, error) {
+func (cfg frozenConfig) marshalOptions(val interface{}, prefix, indent string) ([]byte, error) {
     w := bytes.NewBuffer([]byte{})
     enc := json.NewEncoder(w)
     enc.SetEscapeHTML(cfg.EscapeHTML)
@@ -55,7 +55,7 @@ func (cfg *frozenConfig) marshalOptions(val interface{}, prefix, indent string)
 }
 
 // Marshal is implemented by sonic
-func (cfg *frozenConfig) Marshal(val interface{}) ([]byte, error) {
+func (cfg frozenConfig) Marshal(val interface{}) ([]byte, error) {
     if !cfg.EscapeHTML {
         return cfg.marshalOptions(val, "", "")
     }
@@ -63,13 +63,13 @@ func (cfg *frozenConfig) Marshal(val interface{}) ([]byte, error) {
 }
 
 // MarshalToString is implemented by sonic
-func (cfg *frozenConfig) MarshalToString(val interface{}) (string, error) {
+func (cfg frozenConfig) MarshalToString(val interface{}) (string, error) {
     out, err := cfg.Marshal(val)
     return string(out), err
 }
 
 // MarshalIndent is implemented by sonic
-func (cfg *frozenConfig) MarshalIndent(val interface{}, prefix, indent string) ([]byte, error) {
+func (cfg frozenConfig) MarshalIndent(val interface{}, prefix, indent string) ([]byte, error) {
     if !cfg.EscapeHTML {
         return cfg.marshalOptions(val, prefix, indent)
     }
@@ -77,7 +77,7 @@ func (cfg *frozenConfig) MarshalIndent(val interface{}, prefix, indent string) (
 }
 
 // UnmarshalFromString is implemented by sonic
-func (cfg *frozenConfig) UnmarshalFromString(buf string, val interface{}) error {
+func (cfg frozenConfig) UnmarshalFromString(buf string, val interface{}) error {
     r := bytes.NewBufferString(buf)
     dec := json.NewDecoder(r)
     if cfg.UseNumber {
@@ -90,12 +90,12 @@ func (cfg *frozenConfig) UnmarshalFromString(buf string, val interface{}) error
 }
 
 // Unmarshal is implemented by sonic
-func (cfg *frozenConfig) Unmarshal(buf []byte, val interface{}) error {
+func (cfg frozenConfig) Unmarshal(buf []byte, val interface{}) error {
     return cfg.UnmarshalFromString(string(buf), val)
 }
 
 // NewEncoder is implemented by sonic
-func (cfg *frozenConfig) NewEncoder(writer io.Writer) Encoder {
+func (cfg frozenConfig) NewEncoder(writer io.Writer) Encoder {
     enc := json.NewEncoder(writer)
     if !cfg.EscapeHTML {
         enc.SetEscapeHTML(cfg.EscapeHTML)
@@ -104,7 +104,7 @@ func (cfg *frozenConfig) NewEncoder(writer io.Writer) Encoder {
 }
 
 // NewDecoder is implemented by sonic
-func (cfg *frozenConfig) NewDecoder(reader io.Reader) Decoder {
+func (cfg frozenConfig) NewDecoder(reader io.Reader) Decoder {
     dec := json.NewDecoder(reader)
     if cfg.UseNumber {
         dec.UseNumber()
@@ -116,7 +116,7 @@ func (cfg *frozenConfig) NewDecoder(reader io.Reader) Decoder {
 }
 
 // Valid is implemented by sonic
-func (cfg *frozenConfig) Valid(data []byte) bool {
+func (cfg frozenConfig) Valid(data []byte) bool {
     return json.Valid(data)
 }
 
diff --git a/compat_test.go b/compat_test.go
index 697bcbe..1ce0429 100644
--- a/compat_test.go
+++ b/compat_test.go
@@ -40,3 +40,18 @@ func TestPretouch(t *testing.T) {
     }
 }
 
+func TestGet(t *testing.T) {
+    var data = `{"a":"b"}`
+    r, err := GetFromString(data, "a")
+    if err != nil {
+        t.Fatal(err)
+    }
+    v, err := r.String()
+    if err != nil {
+        t.Fatal(err)
+    }
+    if v != "b" {
+        t.Fatal(v)
+    }
+}
+
diff --git a/sonic.go b/sonic.go
index 99b1dad..829e461 100644
--- a/sonic.go
+++ b/sonic.go
@@ -23,7 +23,6 @@ import (
     `io`
     `reflect`
 
-    `github.com/bytedance/sonic/ast`
     `github.com/bytedance/sonic/decoder`
     `github.com/bytedance/sonic/encoder`
     `github.com/bytedance/sonic/option`
@@ -99,23 +98,23 @@ func (cfg Config) Froze() API {
 }
 
 // Marshal is implemented by sonic
-func (cfg *frozenConfig) Marshal(val interface{}) ([]byte, error) {
+func (cfg frozenConfig) Marshal(val interface{}) ([]byte, error) {
     return encoder.Encode(val, cfg.encoderOpts)
 }
 
 // MarshalToString is implemented by sonic
-func (cfg *frozenConfig) MarshalToString(val interface{}) (string, error) {
+func (cfg frozenConfig) MarshalToString(val interface{}) (string, error) {
     buf, err := encoder.Encode(val, cfg.encoderOpts)
     return rt.Mem2Str(buf), err
 }
 
 // MarshalIndent is implemented by sonic
-func (cfg *frozenConfig) MarshalIndent(val interface{}, prefix, indent string) ([]byte, error) {
+func (cfg frozenConfig) MarshalIndent(val interface{}, prefix, indent string) ([]byte, error) {
     return encoder.EncodeIndented(val, prefix, indent, cfg.encoderOpts)
 }
 
 // UnmarshalFromString is implemented by sonic
-func (cfg *frozenConfig) UnmarshalFromString(buf string, val interface{}) error {
+func (cfg frozenConfig) UnmarshalFromString(buf string, val interface{}) error {
     dec := decoder.NewDecoder(buf)
     dec.SetOptions(cfg.decoderOpts)
     err := dec.Decode(val)
@@ -129,26 +128,26 @@ func (cfg *frozenConfig) UnmarshalFromString(buf string, val interface{}) error
 }
 
 // Unmarshal is implemented by sonic
-func (cfg *frozenConfig) Unmarshal(buf []byte, val interface{}) error {
+func (cfg frozenConfig) Unmarshal(buf []byte, val interface{}) error {
     return cfg.UnmarshalFromString(string(buf), val)
 }
 
 // NewEncoder is implemented by sonic
-func (cfg *frozenConfig) NewEncoder(writer io.Writer) Encoder {
+func (cfg frozenConfig) NewEncoder(writer io.Writer) Encoder {
     enc := encoder.NewStreamEncoder(writer)
     enc.Opts = cfg.encoderOpts
     return enc
 }
 
 // NewDecoder is implemented by sonic
-func (cfg *frozenConfig) NewDecoder(reader io.Reader) Decoder {
+func (cfg frozenConfig) NewDecoder(reader io.Reader) Decoder {
     dec := decoder.NewStreamDecoder(reader)
     dec.SetOptions(cfg.decoderOpts)
     return dec
 }
 
 // Valid is implemented by sonic
-func (cfg *frozenConfig) Valid(data []byte) bool {
+func (cfg frozenConfig) Valid(data []byte) bool {
     ok, _ := encoder.Valid(data)
     return ok
 }
@@ -179,19 +178,3 @@ func Pretouch(vt reflect.Type, opts ...option.CompileOption) error {
 	}
 	return nil
 }
-
-// Get searches the given path json,
-// and returns its representing ast.Node.
-//
-// Each path arg must be integer or string:
-//     - Integer means searching current node as array
-//     - String means searching current node as object
-func Get(src []byte, path ...interface{}) (ast.Node, error) {
-    return GetFromString(string(src), path...)
-}
-
-// GetFromString is same with Get except src is string,
-// which can reduce unnecessary memory copy.
-func GetFromString(src string, path ...interface{}) (ast.Node, error) {
-    return ast.NewSearcher(src).GetByPath(path...)
-}
\ No newline at end of file