Perfomance: Preallocate slices (#61580)

pkg/services/publicdashboards/commands/generate_datasources/generate.go

@@ -56,7 +56,7 @@ func getDatasourcePluginSlugs(baseUrl string) ([]string, error) {
 	if err != nil {
 		return nil, err
 	}
-	var slugs []string
+	slugs := make([]string, 0, len(res.Items))
 	for _, meta := range res.Items {
 		slugs = append(slugs, meta.Slug)
 	}

pkg/services/publicdashboards/service/query.go

@@ -88,7 +88,7 @@ func (pd *PublicDashboardServiceImpl) FindAnnotations(ctx context.Context, reqDT
 		}
 	}
 
-	var results []models.AnnotationEvent
+	results := make([]models.AnnotationEvent, 0, len(uniqueEvents))
 	for _, result := range uniqueEvents {
 		results = append(results, result)
 	}