From 7339abc79eb9c5829bb7252e0669059d35bf2a23 Mon Sep 17 00:00:00 2001
From: Gyu-Ho Lee <gyuhox@gmail.com>
Date: Mon, 4 Jan 2016 22:34:48 -0800
Subject: [PATCH] storage: fix watchable_store notify to hash-lookup once

We should just assign events and ok at first, and check the
boolean value, instead of looking up the map twice.
---
 storage/watchable_store.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/storage/watchable_store.go b/storage/watchable_store.go
index 0635da822..e66ff5599 100644
--- a/storage/watchable_store.go
+++ b/storage/watchable_store.go
@@ -375,10 +375,10 @@ func (s *watchableStore) notify(rev int64, evs []storagepb.Event) {
 	we := newWatcherToEventMap(s.synced, evs)
 	for _, wm := range s.synced {
 		for w := range wm {
-			if _, ok := we[w]; !ok {
+			es, ok := we[w]
+			if !ok {
 				continue
 			}
-			es := we[w]
 			wr := WatchResponse{WatchID: w.id, Events: es}
 			select {
 			case w.ch <- wr: