var wg sync.WaitGroup defer wg.Wait() for i := 0; i < 10; i++ { wg.Add(1) go func() { defer GinkgoRecover() defer wg.Done() expectedData := []byte("some-data") _, err := client.WriteToFile(id, expectedData) Expect(err).ToNot(HaveOccurred()) var msg *messages.Client Eventually(mockServers[1].clientCh).Should(Receive(&msg)) Expect(msg.GetMessageType()).To(Equal(messages.Client_WriteToFile)) Expect(msg.GetWriteToFile().GetData()).To(Equal(expectedData)) }() } }, 5) Measure("Writes to a file 1000 times in under a second", func(b Benchmarker) { runtime := b.Time("runtime", func() { mockServers[0].serverCh <- buildFileLocation(1) count := 1000 go func() { for i := 0; i < count; i++ { mockServers[0].serverCh <- buildFileOffset(uint64(i+2), 101) } }()