Merge pull request kubernetes#75730 from wojtek-t/minor_perf_improvements

Avoid allocations in ByIndex() function

Author: k8s-ci-robot

staging/src/k8s.io/client-go/tools/cache/thread_safe_store.go

@@ -185,7 +185,7 @@ func (c *threadSafeMap) ByIndex(indexName, indexKey string) ([]interface{}, erro
 
 	set := index[indexKey]
 	list := make([]interface{}, 0, set.Len())
-	for _, key := range set.List() {
+	for key := range set {
 		list = append(list, c.items[key])
 	}
 

test/utils/runners.go

@@ -827,7 +827,7 @@ func (config *RCConfig) start() error {
 	if oldRunning != config.Replicas {
 		// List only pods from a given replication controller.
 		options := metav1.ListOptions{LabelSelector: label.String()}
-		if pods, err := config.Client.CoreV1().Pods(metav1.NamespaceAll).List(options); err == nil {
+		if pods, err := config.Client.CoreV1().Pods(config.Namespace).List(options); err == nil {
 			for _, pod := range pods.Items {
 				config.RCConfigLog("Pod %s\t%s\t%s\t%s", pod.Name, pod.Spec.NodeName, pod.Status.Phase, pod.DeletionTimestamp)
 			}