Make the gethostbyname benchmark more precise

test/benchmark-ares.c

@@ -41,16 +41,16 @@ static int argument;
 static int64_t start_time;
 static int64_t end_time;
 
-/* callback method. may issue another call */
-static void aresbynamecallback( void *arg,
-                          int status,
-                          int timeouts,
-                          struct hostent *hostent) {
-    ares_callbacks++;
-    if (status != 0) {
-      ares_errors++;
-    }
 
+/* callback method. */
+static void aresbynamecallback(void *arg,
+                               int status,
+                               int timeouts,
+                               struct hostent *hostent) {
+  ares_callbacks++;
+  if (status != 0) {
+    ares_errors++;
+  }
 }
 
 
@@ -89,30 +89,29 @@ BENCHMARK_IMPL(gethostbyname) {
   ares_callbacks = 0;
   ares_errors = 0;
 
-  uv_update_time(loop);
-  start_time = uv_now(loop);
+  start_time = uv_hrtime();
 
   prep_tcploopback();
 
   for (ares_start = 0; ares_start < NUM_CALLS_TO_START; ares_start++) {
     ares_gethostbyname(channel,
-                      "echos.srv",
-                      AF_INET,
-                      &aresbynamecallback,
-                      &argument);
+                       "echos.srv",
+                       AF_INET,
+                       &aresbynamecallback,
+                       &argument);
   }
 
   uv_run(loop);
 
   uv_ares_destroy(loop, channel);
 
-  end_time = uv_now(loop);
+  end_time = uv_hrtime();
 
   if (ares_errors > 0) {
     printf("There were %d failures\n", ares_errors);
   }
   LOGF("ares_gethostbyname: %.0f req/s\n",
-      1000.0 * ares_callbacks / (double)(end_time - start_time));
+       1e9 * ares_callbacks / (double)(end_time - start_time));
 
   return 0;
 }