diff --git a/controllers/helmrepository_controller.go b/controllers/helmrepository_controller.go
index b3d1d1487..41a391253 100644
--- a/controllers/helmrepository_controller.go
+++ b/controllers/helmrepository_controller.go
@@ -475,8 +475,7 @@ func (r *HelmRepositoryReconciler) reconcileSource(ctx context.Context, sp *patc
 		}
 		if curDig.Validate() == nil {
 			// Short-circuit based on the fetched index being an exact match to the
-			// stored Artifact. This prevents having to unmarshal the YAML to calculate
-			// the (stable) revision, which is a memory expensive operation.
+			// stored Artifact.
 			if newDig := chartRepo.Digest(curDig.Algorithm()); newDig.Validate() == nil && (newDig == curDig) {
 				*artifact = *curArtifact
 				conditions.Delete(obj, sourcev1.FetchFailedCondition)
@@ -501,11 +500,11 @@ func (r *HelmRepositoryReconciler) reconcileSource(ctx context.Context, sp *patc
 	var changed bool
 	if artifact := obj.Status.Artifact; artifact != nil {
 		curRev := digest.Digest(sourcev1.TransformLegacyRevision(artifact.Revision))
-		changed = curRev.Validate() != nil || curRev != chartRepo.Revision(curRev.Algorithm())
+		changed = curRev.Validate() != nil || curRev != chartRepo.Digest(curRev.Algorithm())
 	}
 
 	// Calculate revision.
-	revision := chartRepo.Revision(intdigest.Canonical)
+	revision := chartRepo.Digest(intdigest.Canonical)
 	if revision.Validate() != nil {
 		e := &serror.Event{
 			Err:    fmt.Errorf("failed to calculate revision: %w", err),
diff --git a/internal/helm/repository/chart_repository.go b/internal/helm/repository/chart_repository.go
index 8071df242..269dabf33 100644
--- a/internal/helm/repository/chart_repository.go
+++ b/internal/helm/repository/chart_repository.go
@@ -386,6 +386,8 @@ func (r *ChartRepository) DownloadIndex(w io.Writer) (err error) {
 
 // Revision returns the revision of the ChartRepository's Index. It assumes
 // the Index is stable sorted.
+// Deprecated: because of expensive memory usage of (YAML) marshal operations.
+// We only use Digest now.
 func (r *ChartRepository) Revision(algorithm digest.Algorithm) digest.Digest {
 	if !r.HasIndex() {
 		return ""