From 25673b61e4d9514f3f5d244fc755b5ff224a488f Mon Sep 17 00:00:00 2001
From: Andy Asp <andy.asp@grafana.com>
Date: Tue, 12 Sep 2023 13:38:16 -0400
Subject: [PATCH 1/2] GCS: use Query.SetAttrSelection when listing

Signed-off-by: Andy Asp <andy.asp@grafana.com>
---
 providers/gcs/gcs.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/providers/gcs/gcs.go b/providers/gcs/gcs.go
index 5ea45c7e..ad305d6e 100644
--- a/providers/gcs/gcs.go
+++ b/providers/gcs/gcs.go
@@ -108,10 +108,16 @@ func (b *Bucket) Iter(ctx context.Context, dir string, f func(string) error, opt
 		delimiter = ""
 	}
 
-	it := b.bkt.Objects(ctx, &storage.Query{
+	query := &storage.Query{
 		Prefix:    dir,
 		Delimiter: delimiter,
-	})
+	}
+	err := query.SetAttrSelection([]string{"Name"})
+	if err != nil {
+		return err
+	}
+
+	it := b.bkt.Objects(ctx, query)
 	for {
 		select {
 		case <-ctx.Done():

From 02d54dc163e2e0bddcc35b52c5e69bb1e33cbd85 Mon Sep 17 00:00:00 2001
From: Andy Asp <andy.asp@grafana.com>
Date: Tue, 12 Sep 2023 16:09:45 -0400
Subject: [PATCH 2/2] Add changelog entry

Signed-off-by: Andy Asp <andy.asp@grafana.com>
---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4b9387df..72f8f180 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ We use *breaking :warning:* to mark changes that are not backward compatible (re
 - [#64](https://github.com/thanos-io/objstore/pull/64) OCI: OKE Workload Identity support.
 - [#73](https://github.com/thanos-io/objstore/pull/73) Аdded file path to erros from DownloadFile
 - [#51](https://github.com/thanos-io/objstore/pull/51) Azure: Support using connection string authentication.
+- [#76](https://github.com/thanos-io/objstore/pull/76) GCS: Query for object names only in `Iter` to possibly improve performance when listing objects.
 
 ### Changed
 - [#38](https://github.com/thanos-io/objstore/pull/38) *: Upgrade minio-go version to `v7.0.45`.