object/store/packed: Use zlib.NewReaderBytes where appropriate to reduce allocs

3 files changed, 3 insertions, 5 deletions

diff --git a/object/store/packed/delta.go b/object/store/packed/delta.go
index e48e2c65..c8fe8f75 100644
--- a/object/store/packed/delta.go
+++ b/object/store/packed/delta.go
@@ -1,7 +1,6 @@
 package packed
 
 import (
-	"bytes"
 	"fmt"
 	"io"
 	"slices"
@@ -208,7 +207,7 @@ func (packed *Packed) resolveType(p *pack, offset int, entryHeader packfile.Entr
 // deltaResultSize reads the declared result size
 // from one compressed delta payload prefix.
 func deltaResultSize(payload []byte, deltaSize uint64) (int, error) {
-	zr, err := zlib.NewReader(bytes.NewReader(payload))
+	zr, err := zlib.NewReaderBytes(payload)
 	if err != nil {
 		return 0, fmt.Errorf("reading delta header: %w", err)
 	}
diff --git a/object/store/packed/entry.go b/object/store/packed/entry.go
index e9d45bb4..908afad0 100644
--- a/object/store/packed/entry.go
+++ b/object/store/packed/entry.go
@@ -1,7 +1,6 @@
 package packed
 
 import (
-	"bytes"
 	"errors"
 	"fmt"
 	"io"
@@ -49,7 +48,7 @@ func inflate(payload []byte, expectedSize uint64) ([]byte, error) {
 		return nil, fmt.Errorf("declared size: %w", err)
 	}
 
-	zr, err := zlib.NewReader(bytes.NewReader(payload))
+	zr, err := zlib.NewReaderBytes(payload)
 	if err != nil {
 		return nil, fmt.Errorf("inflating entry payload: %w", err)
 	}
diff --git a/object/store/packed/reader.go b/object/store/packed/reader.go
index bfc82eff..cf433cfc 100644
--- a/object/store/packed/reader.go
+++ b/object/store/packed/reader.go
@@ -165,7 +165,7 @@ func (packed *Packed) ReadReaderContent(objectID id.ObjectID) (typ.Type, int, io
 		return typ.Unknown, 0, nil, fmt.Errorf("%w: pack %q: object size overflows int: %w", ErrMalformedPackedStore, p.name, err)
 	}
 
-	zr, err := zlib.NewReader(bytes.NewReader(payload))
+	zr, err := zlib.NewReaderBytes(payload)
 	if err != nil {
 		return typ.Unknown, 0, nil, fmt.Errorf("%w: pack %q: %w", ErrMalformedPackedStore, p.name, err)
 	}