add encoder nosplit

Author: IncSW

README.md

@@ -43,8 +43,8 @@ data, err := bencode.Unmarshal(value)
 
 | Library                      |    Time     | Bytes Allocated | Objects Allocated |
 | :--------------------------- | :---------: | :-------------: | :---------------: |
-| IncSW/go-bencode [MarshalTo] | 590.8 ns/op |    112 B/op     |    2 allocs/op    |
-| IncSW/go-bencode [Marshal]   | 676.1 ns/op |    624 B/op     |    3 allocs/op    |
+| IncSW/go-bencode [MarshalTo] | 581.0 ns/op |    112 B/op     |    2 allocs/op    |
+| IncSW/go-bencode [Marshal]   | 662.6 ns/op |    624 B/op     |    3 allocs/op    |
 | marksamman/bencode           | 820.3 ns/op |    384 B/op     |    8 allocs/op    |
 | cristalhq/bencode            | 994.2 ns/op |    928 B/op     |    4 allocs/op    |
 | aleksatr/go-bencode          | 1061 ns/op  |    736 B/op     |    9 allocs/op    |

internal/encoder/bytes.go

@@ -1,5 +1,6 @@
 package encoder
 
+//go:nosplit
 func (e *Encoder) encodeBytes(data []byte) {
 	dataLength := len(data)
 	e.grow(dataLength + 23)

internal/encoder/dictionary.go

@@ -2,6 +2,7 @@ package encoder
 
 import "github.com/IncSW/go-bencode/internal"
 
+//go:nosplit
 func (e *Encoder) encodeDictionary(data map[string]interface{}) error {
 	e.grow(1)
 	e.writeByte('d')

internal/encoder/encoder.go

@@ -67,6 +67,7 @@ func (e *Encoder) writeByte(data byte) {
 	e.offset++
 }
 
+//go:nosplit
 func (e *Encoder) EncodeTo(dst []byte, data interface{}) ([]byte, error) {
 	if cap(dst) > len(dst) {
 		dst = dst[:cap(dst)]
@@ -82,6 +83,7 @@ func (e *Encoder) EncodeTo(dst []byte, data interface{}) ([]byte, error) {
 	return e.buffer[:e.offset], nil
 }
 
+//go:nosplit
 func (e *Encoder) encode(data interface{}) error {
 	switch value := data.(type) {
 	case int64:

internal/encoder/int.go

@@ -44,6 +44,7 @@ func init() {
 	}
 }
 
+//go:nosplit
 func (e *Encoder) writeInt(data int64) {
 	u64 := uint64(data)
 	n := u64 & intMask
@@ -86,6 +87,7 @@ func (e *Encoder) writeInt(data int64) {
 	e.write(b[i:])
 }
 
+//go:nosplit
 func (e *Encoder) encodeInt(data int64) {
 	e.grow(24)
 	e.writeByte('i')

internal/encoder/list.go

@@ -1,5 +1,6 @@
 package encoder
 
+//go:nosplit
 func (e *Encoder) encodeList(data []interface{}) error {
 	e.grow(1)
 	e.writeByte('l')