Zstd re-use

internal/decompress/zstd.go

@@ -1,31 +1,20 @@
 package decompress
 
 import (
-	"sync"
-
 	"github.com/klauspost/compress/zstd"
 )
 
 type Zstd struct {
-	pool sync.Pool
+	rdr *zstd.Decoder
 }
 
-func NewZstd() *Zstd {
-	return &Zstd{
-		pool: sync.Pool{
-			New: func() any {
-				rdr, _ := zstd.NewReader(nil, zstd.WithDecoderLowmem(true), zstd.WithDecoderConcurrency(1))
-				return rdr
-			},
-		},
+func NewZstd() Zstd {
+	rdr, _ := zstd.NewReader(nil, zstd.WithDecoderLowmem(true))
+	return Zstd{
+		rdr: rdr,
 	}
 }
 
-func (z *Zstd) Decompress(data []byte) ([]byte, error) {
-	rdr := z.pool.Get().(*zstd.Decoder)
-	defer func() {
-		rdr.Reset(nil)
-		z.pool.Put(rdr)
-	}()
-	return rdr.DecodeAll(data, nil)
+func (z Zstd) Decompress(data []byte) ([]byte, error) {
+	return z.rdr.DecodeAll(data, nil)
 }