diff --git a/decoder/assembler_amd64_go116.go b/decoder/assembler_amd64_go116.go
index 8069b3785..35e2d009c 100644
--- a/decoder/assembler_amd64_go116.go
+++ b/decoder/assembler_amd64_go116.go
@@ -215,6 +215,7 @@ var (
 type _Assembler struct {
     jit.BaseAssembler
     p _Program
+    name string
 }
 
 func newAssembler(p _Program) *_Assembler {
@@ -224,7 +225,7 @@ func newAssembler(p _Program) *_Assembler {
 /** Assembler Interface **/
 
 func (self *_Assembler) Load() _Decoder {
-    return ptodec(self.BaseAssembler.LoadWithFaker("json_decoder", _FP_size, _FP_args, _Decoder_Shadow))
+    return ptodec(self.BaseAssembler.LoadWithFaker("decode_"+self.name, _FP_size, _FP_args, _Decoder_Shadow))
 }
 
 func (self *_Assembler) Init(p _Program) *_Assembler {
diff --git a/decoder/assembler_amd64_go117.go b/decoder/assembler_amd64_go117.go
index f791b124d..2b1b0e3fb 100644
--- a/decoder/assembler_amd64_go117.go
+++ b/decoder/assembler_amd64_go117.go
@@ -225,7 +225,7 @@ var (
 )
 
 func (self *_Assembler) Load() _Decoder {
-    return ptodec(self.BaseAssembler.Load(self.name+".Decoder", _FP_size, _FP_args, argPtrs, localPtrs))
+    return ptodec(self.BaseAssembler.Load("decode_"+self.name, _FP_size, _FP_args, argPtrs, localPtrs))
 }
 
 func (self *_Assembler) Init(p _Program) *_Assembler {
diff --git a/decoder/generic_amd64_go117.go b/decoder/generic_amd64_go117.go
index 426ec3389..2d79290c1 100644
--- a/decoder/generic_amd64_go117.go
+++ b/decoder/generic_amd64_go117.go
@@ -90,7 +90,7 @@ var (
 
 func (self *_ValueDecoder) build() uintptr {
     self.Init(self.compile)
-    return *(*uintptr)(self.Load("generic_decoder", _VD_size, _VD_args, argPtrs1, localPtrs1))
+    return *(*uintptr)(self.Load("decode_value", _VD_size, _VD_args, argPtrs1, localPtrs1))
 }
 
 /** Function Calling Helpers **/
diff --git a/decoder/stubs_go115.go b/decoder/stubs_go115.go
new file mode 100644
index 000000000..b33dd5cb9
--- /dev/null
+++ b/decoder/stubs_go115.go
@@ -0,0 +1,112 @@
+//go:build go1.15,!go1.20
+// +build go1.15,!go1.20
+
+/*
+ * Copyright 2021 ByteDance Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package decoder
+
+import (
+    `unsafe`
+    `reflect`
+
+    _ `github.com/chenzhuoyu/base64x`
+
+    `github.com/bytedance/sonic/internal/rt`
+)
+
+//go:linkname _subr__b64decode github.com/chenzhuoyu/base64x._subr__b64decode
+var _subr__b64decode uintptr
+
+// runtime.maxElementSize
+const _max_map_element_size uintptr = 128
+
+func mapfast(vt reflect.Type) bool {
+    return vt.Elem().Size() <= _max_map_element_size
+}
+
+//go:nosplit
+//go:linkname throw runtime.throw
+//goland:noinspection GoUnusedParameter
+func throw(s string)
+
+//go:linkname convT64 runtime.convT64
+//goland:noinspection GoUnusedParameter
+func convT64(v uint64) unsafe.Pointer
+
+//go:linkname convTslice runtime.convTslice
+//goland:noinspection GoUnusedParameter
+func convTslice(v []byte) unsafe.Pointer
+
+//go:linkname convTstring runtime.convTstring
+//goland:noinspection GoUnusedParameter
+func convTstring(v string) unsafe.Pointer
+
+//go:noescape
+//go:linkname memequal runtime.memequal
+//goland:noinspection GoUnusedParameter
+func memequal(a unsafe.Pointer, b unsafe.Pointer, size uintptr) bool
+
+//go:noescape
+//go:linkname memmove runtime.memmove
+//goland:noinspection GoUnusedParameter
+func memmove(to unsafe.Pointer, from unsafe.Pointer, n uintptr)
+
+//go:linkname mallocgc runtime.mallocgc
+//goland:noinspection GoUnusedParameter
+func mallocgc(size uintptr, typ *rt.GoType, needzero bool) unsafe.Pointer
+
+//go:linkname makeslice runtime.makeslice
+//goland:noinspection GoUnusedParameter
+func makeslice(et *rt.GoType, len int, cap int) unsafe.Pointer
+
+//go:noescape
+//go:linkname growslice runtime.growslice
+//goland:noinspection GoUnusedParameter
+func growslice(et *rt.GoType, old rt.GoSlice, cap int) rt.GoSlice
+
+//go:linkname makemap_small runtime.makemap_small
+func makemap_small() unsafe.Pointer
+
+//go:linkname mapassign runtime.mapassign
+//goland:noinspection GoUnusedParameter
+func mapassign(t *rt.GoType, h unsafe.Pointer, k unsafe.Pointer) unsafe.Pointer
+
+//go:linkname mapassign_fast32 runtime.mapassign_fast32
+//goland:noinspection GoUnusedParameter
+func mapassign_fast32(t *rt.GoType, h unsafe.Pointer, k uint32) unsafe.Pointer
+
+//go:linkname mapassign_fast64 runtime.mapassign_fast64
+//goland:noinspection GoUnusedParameter
+func mapassign_fast64(t *rt.GoType, h unsafe.Pointer, k uint64) unsafe.Pointer
+
+//go:linkname mapassign_fast64ptr runtime.mapassign_fast64ptr
+//goland:noinspection GoUnusedParameter
+func mapassign_fast64ptr(t *rt.GoType, h unsafe.Pointer, k unsafe.Pointer) unsafe.Pointer
+
+//go:linkname mapassign_faststr runtime.mapassign_faststr
+//goland:noinspection GoUnusedParameter
+func mapassign_faststr(t *rt.GoType, h unsafe.Pointer, s string) unsafe.Pointer
+
+//go:nosplit
+//go:linkname memclrHasPointers runtime.memclrHasPointers
+//goland:noinspection GoUnusedParameter
+func memclrHasPointers(ptr unsafe.Pointer, n uintptr)
+
+//go:noescape
+//go:linkname memclrNoHeapPointers runtime.memclrNoHeapPointers
+//goland:noinspection GoUnusedParameter
+func memclrNoHeapPointers(ptr unsafe.Pointer, n uintptr)
\ No newline at end of file
diff --git a/encoder/assembler_amd64_go116.go b/encoder/assembler_amd64_go116.go
index 56a898f0a..0c546b1b7 100644
--- a/encoder/assembler_amd64_go116.go
+++ b/encoder/assembler_amd64_go116.go
@@ -187,7 +187,7 @@ func newAssembler(p _Program) *_Assembler {
 /** Assembler Interface **/
 
 func (self *_Assembler) Load() _Encoder {
-    return ptoenc(self.BaseAssembler.Load(self.name+".Encoder", _FP_size, _FP_args, argStackmap, localStackmap))
+    return ptoenc(self.BaseAssembler.LoadWithFaker("encode_"+self.name, _FP_size, _FP_args, _Encoder_Shadow))
 }
 
 func (self *_Assembler) Init(p _Program) *_Assembler {
diff --git a/encoder/assembler_amd64_go117.go b/encoder/assembler_amd64_go117.go
index d01cf8293..16f3c28e3 100644
--- a/encoder/assembler_amd64_go117.go
+++ b/encoder/assembler_amd64_go117.go
@@ -192,7 +192,7 @@ func newAssembler(p _Program) *_Assembler {
 
 /** Assembler Interface **/
 func (self *_Assembler) Load() _Encoder {
-    return ptoenc(self.BaseAssembler.Load(self.name+".Encoder", _FP_size, _FP_args, argStackmap, localStackmap))
+    return ptoenc(self.BaseAssembler.Load("encode_"+self.name, _FP_size, _FP_args, argStackmap, localStackmap))
 }
 
 func (self *_Assembler) Init(p _Program) *_Assembler {
diff --git a/internal/jit/assembler_amd64.go b/internal/jit/assembler_amd64.go
index 5d337df90..dafd744f1 100644
--- a/internal/jit/assembler_amd64.go
+++ b/internal/jit/assembler_amd64.go
@@ -209,7 +209,7 @@ func (self *BaseAssembler) Init(f func()) {
 
 func (self *BaseAssembler) Load(name string, frameSize int, argSize int, argStackmap []bool, localStackmap []bool) loader.Function {
     self.build()
-    l := loader.Loader{
+    l := loader.ModuleLoader{
         Name: "sonic.jit",
         File: "github.com/bytedance/sonic/jit.go",
     }
@@ -217,6 +217,11 @@ func (self *BaseAssembler) Load(name string, frameSize int, argSize int, argStac
     return l.LoadFunc(self.c, name, frameSize, argSize, argStackmap, localStackmap)
 }
 
+func (self *BaseAssembler) LoadWithFaker(name string, frameSize int, argSize int, faker interface{}) loader.Function {
+    self.build()
+    return loader.Loader(self.c).LoadWithFaker(name, frameSize, argSize, faker)
+}
+
 /** Assembler Stages **/
 
 func (self *BaseAssembler) init() {
diff --git a/internal/loader/funcdata_go116.go b/internal/loader/funcdata_go116.go
index 20d7df1a2..4570cbd06 100644
--- a/internal/loader/funcdata_go116.go
+++ b/internal/loader/funcdata_go116.go
@@ -22,7 +22,7 @@ import (
     `unsafe`
 )
 
-type _Func struct {
+type _func struct {
     entry       uintptr // start pc
     nameoff     int32   // function name
     args        int32   // in/out args size
@@ -39,7 +39,7 @@ type _Func struct {
     localptrs   uintptr
 }
 
-type _FuncTab struct {
+type _funcTab struct {
     entry   uintptr
     funcoff uintptr
 }
@@ -74,14 +74,14 @@ type _TextSection struct {
     baseaddr uintptr // relocated section address
 }
 
-type _ModuleData struct {
+type moduledata struct {
     pcHeader              *_PCHeader
     funcnametab           []byte
     cutab                 []uint32
     filetab               []byte
     pctab                 []byte
-    pclntable             []_Func
-    ftab                  []_FuncTab
+    pclntable             []_func
+    ftab                  []_funcTab
     findfunctab           *_FindFuncBucket
     minpc, maxpc          uintptr
     text, etext           uintptr
@@ -103,7 +103,7 @@ type _ModuleData struct {
     gcdatamask, gcbssmask _BitVector
     typemap               map[int32]unsafe.Pointer
     bad                   bool
-    next                  *_ModuleData
+    next                  *moduledata
 }
 
 type _FindFuncBucket struct {
@@ -131,7 +131,7 @@ func registerFunction(name string, pc uintptr, textSize uintptr, fp int, args in
     maxpc := pc + size
 
     /* function entry */
-    lnt := []_Func {{
+    lnt := []_func {{
         entry     : pc,
         nameoff   : 1,
         args      : int32(args),
@@ -142,14 +142,14 @@ func registerFunction(name string, pc uintptr, textSize uintptr, fp int, args in
     }}
 
     /* function table */
-    tab := []_FuncTab {
+    tab := []_funcTab {
         {entry: pc},
         {entry: pc},
         {entry: maxpc},
     }
 
     /* module data */
-    mod := &_ModuleData {
+    mod := &moduledata {
         pcHeader    : modHeader,
         funcnametab : append(append([]byte{0}, name...), 0),
         pctab       : append(makePCtab(fp), encodeVariant(int(size))...),
@@ -166,4 +166,6 @@ func registerFunction(name string, pc uintptr, textSize uintptr, fp int, args in
     /* verify and register the new module */
     moduledataverify1(mod)
     registerModule(mod)
-}
\ No newline at end of file
+}
+
+func makeModuledata(name string, filenames []string, funcs []Func, text []byte) (mod *moduledata)
\ No newline at end of file
diff --git a/internal/loader/loader.go b/internal/loader/loader.go
index ad0ed6011..594d5a876 100644
--- a/internal/loader/loader.go
+++ b/internal/loader/loader.go
@@ -20,8 +20,12 @@
 package loader
 
 import (
+	"fmt"
+	"os"
 	"syscall"
 	"unsafe"
+
+	"github.com/bytedance/sonic/internal/rt"
 )
 
 const (
@@ -30,8 +34,28 @@ const (
     _RW = syscall.PROT_READ | syscall.PROT_WRITE
 )
 
+type Loader []byte
+
+func (self Loader) LoadWithFaker(fn string, fp int, args int, faker interface{}) (f Function) {
+    p := os.Getpagesize()
+    n := int(rnd(int64(len(self)), int64(p)))
+
+    /* register the function */
+    m := mmap(n)
+    v := fmt.Sprintf("runtime.__%s_%x", fn, m)
+    argsptr, localsptr := GetStackMap(faker)
+    registerFunction(v, m, uintptr(n), fp, args, uintptr(len(self)), argsptr, localsptr)
+
+    /* reference as a slice */
+    s := rt.BytesFrom(unsafe.Pointer(m), len(self), n)
+
+    /* copy the machine code, and make it executable */
+    copy(s, self)
+    mprotect(m, n)
+    return Function(&m)
+}
 
-type Loader struct {
+type ModuleLoader struct {
     Name string
     File string
     Options
@@ -43,51 +67,8 @@ type Options struct {
 
 type Function unsafe.Pointer
 
-// func (self Loader) LoadWithFaker(fn string, fp int, args int, faker interface{}) (f Function) {
-//     p := os.Getpagesize()
-//     n := int(rnd(int64(len(self)), int64(p)))
-
-//     /* register the function */
-//     m := mmap(n)
-//     v := fmt.Sprintf("runtime.__%s_%x", fn, m)
-//     argsptr, localsptr := GetStackMap(faker)
-//     registerFunction(v, m, uintptr(n), fp, args, uintptr(len(self)), argsptr, localsptr)
-
-//     /* reference as a slice */
-//     s := *(*[]byte)(unsafe.Pointer(&reflect.SliceHeader {
-//         Data : m,
-//         Cap  : n,
-//         Len  : len(self),
-//     }))
-
-//     /* copy the machine code, and make it executable */
-//     copy(s, self)
-//     mprotect(m, n)
-//     return Function(&m)
-// }
-
-// func (self Loader) Load(fn string, fp int, args int) (f Function) {
-//     return self.LoadWithFaker(fn, fp, args, func(){})
-// }
-
-func Load(modulename string, filenames []string, funcs []Func, text []byte) (out []Function) {
-    // generate module data and allocate memory address
-    mod := makeModuledata(modulename, filenames, funcs, text)
-
-    // verify and register the new module
-    moduledataverify1(mod)
-    registerModule(mod)
-
-    // encapsulate function address
-    out = make([]Function, len(funcs))
-    for i, f := range funcs {
-        m := uintptr(mod.text + uintptr(f.EntryOff))
-        out[i] = Function(&m)
-    }
-    return 
-}
 
-func (self Loader) LoadFunc(text []byte, funcName string, frameSize int, argSize int, argStackmap []bool, localStackmap []bool) Function {
+func (self ModuleLoader) LoadFunc(text []byte, funcName string, frameSize int, argSize int, argStackmap []bool, localStackmap []bool) Function {
     size := uint32(len(text))
 
     fn := Func{
@@ -132,4 +113,21 @@ func (self Loader) LoadFunc(text []byte, funcName string, frameSize int, argSize
 
     out := Load(self.Name + funcName, []string{self.File}, []Func{fn}, text)
     return out[0]
+}
+
+func Load(modulename string, filenames []string, funcs []Func, text []byte) (out []Function) {
+    // generate module data and allocate memory address
+    mod := makeModuledata(modulename, filenames, funcs, text)
+
+    // verify and register the new module
+    moduledataverify1(mod)
+    registerModule(mod)
+
+    // encapsulate function address
+    out = make([]Function, len(funcs))
+    for i, f := range funcs {
+        m := uintptr(mod.text + uintptr(f.EntryOff))
+        out[i] = Function(&m)
+    }
+    return 
 }
\ No newline at end of file
diff --git a/internal/loader/loader_test.go b/internal/loader/loader_test.go
index c6015b42b..9edad4f02 100644
--- a/internal/loader/loader_test.go
+++ b/internal/loader/loader_test.go
@@ -32,7 +32,7 @@ func TestLoader_LoadFunc(t *testing.T) {
         0xc3,                                       // RET
     }
     v0 := 0
-    l := Loader{
+    l := ModuleLoader{
         Name: "test",
         File: "test.go",
     }