optimize(link): pack zstd en/decoding

gold/link/zstd.go

@@ -0,0 +1,41 @@
+package link
+
+import (
+	"bytes"
+	"io"
+
+	"github.com/fumiama/WireGold/helper"
+	"github.com/fumiama/orbyte/pbuf"
+	"github.com/klauspost/compress/zstd"
+)
+
+func encodezstd(data []byte) pbuf.Bytes {
+	w := helper.SelectWriter()
+	enc, err := zstd.NewWriter(w, zstd.WithEncoderLevel(zstd.SpeedFastest))
+	if err != nil {
+		panic(err)
+	}
+	_, err = io.Copy(enc, bytes.NewReader(data))
+	if err != nil {
+		panic(err)
+	}
+	err = enc.Close()
+	if err != nil {
+		panic(err)
+	}
+	return w.TransBytes()
+}
+
+func decodezstd(data []byte) (pbuf.Bytes, error) {
+	dec, err := zstd.NewReader(bytes.NewReader(data))
+	if err != nil {
+		return pbuf.Bytes{}, err
+	}
+	w := helper.SelectWriter()
+	_, err = io.Copy(w, dec)
+	dec.Close()
+	if err != nil {
+		return pbuf.Bytes{}, err
+	}
+	return w.TransBytes(), nil
+}