[v10.0.x] Dashboards: Variables - Improve slow template variable loading due same variable loaded multiple times on time range change (#69641)

Co-authored-by: Alexa V <239999+axelavargas@users.noreply.github.com>

pkg/services/featuremgmt/registry.go

@@ -479,6 +479,12 @@ var (
 			RequiresDevMode: true,
 			Owner:           grafanaAuthnzSquad,
 		},
+		{
+			Name:        "refactorVariablesTimeRange",
+			Description: "Refactor time range variables flow to reduce number of API calls made when query variables are chained",
+			State:       FeatureStateBeta,
+			Owner:       grafanaDashboardsSquad,
+		},
 		{
 			Name:            "useCachingService",
 			Description:     "When turned on, the new query and resource caching implementation using a wire service inject will be used in place of the previous middleware implementation",

pkg/services/featuremgmt/toggles_gen.csv

@@ -70,6 +70,7 @@ unifiedRequestLog,alpha,@grafana/backend-platform,false,false,false,false
 renderAuthJWT,beta,@grafana/grafana-as-code,false,false,false,false
 pyroscopeFlameGraph,alpha,@grafana/observability-traces-and-profiling,false,false,false,false
 externalServiceAuth,alpha,@grafana/grafana-authnz-team,true,false,false,false
+refactorVariablesTimeRange,beta,@grafana/dashboards-squad,false,false,false,false
 useCachingService,stable,@grafana/grafana-operator-experience-squad,false,false,true,false
 enableElasticsearchBackendQuerying,beta,@grafana/observability-logs,false,false,false,false
 authenticationConfigUI,alpha,@grafana/grafana-authnz-team,false,false,false,false

pkg/services/featuremgmt/toggles_gen.go

@@ -291,6 +291,10 @@ const (
 	// Starts an OAuth2 authentication provider for external services
 	FlagExternalServiceAuth = "externalServiceAuth"
 
+	// FlagRefactorVariablesTimeRange
+	// Refactor time range variables flow to reduce number of API calls made when query variables are chained
+	FlagRefactorVariablesTimeRange = "refactorVariablesTimeRange"
+
 	// FlagUseCachingService
 	// When turned on, the new query and resource caching implementation using a wire service inject will be used in place of the previous middleware implementation
 	FlagUseCachingService = "useCachingService"