Parallelize RC deletion in density test

test/e2e/scalability/density.go

@@ -357,14 +357,23 @@ func cleanupDensityTest(dtc DensityTestConfig, testPhaseDurations *timer.TestPha
 	By("Deleting created Collections")
 	numberOfClients := len(dtc.ClientSets)
 	// We explicitly delete all pods to have API calls necessary for deletion accounted in metrics.
+	wg := sync.WaitGroup{}
+	wg.Add(len(dtc.Configs))
 	for i := range dtc.Configs {
 		name := dtc.Configs[i].GetName()
 		namespace := dtc.Configs[i].GetNamespace()
 		kind := dtc.Configs[i].GetKind()
-		By(fmt.Sprintf("Cleaning up only the %v, garbage collector will clean up the pods", kind))
-		err := framework.DeleteResourceAndWaitForGC(dtc.ClientSets[i%numberOfClients], kind, namespace, name)
-		framework.ExpectNoError(err)
+		client := dtc.ClientSets[i%numberOfClients]
+		go func() {
+			defer GinkgoRecover()
+			// Call wg.Done() in defer to avoid blocking whole test
+			// in case of error from RunRC.
+			defer wg.Done()
+			err := framework.DeleteResourceAndWaitForGC(client, kind, namespace, name)
+			framework.ExpectNoError(err)
+		}()
 	}
+	wg.Wait()
 	podCleanupPhase.End()
 
 	dtc.deleteSecrets(testPhaseDurations.StartPhase(910, "secrets deletion"))