From 4ff5c7294cfbc776157843ec9b88f0b580ef1867 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20B=C3=BCchele?= <danielbuechele@fb.com>
Date: Wed, 7 Nov 2018 06:22:13 -0800
Subject: [PATCH] don't update when nothing changed

Summary:
The QPL plugin is sending the current time on the device every second, this was causing state updates every second.

QPL: don't update the state, when we did not receive new traces.
Client: only dispatch the update event, when the new state is different from the current.

Reviewed By: passy

Differential Revision: D12956337

fbshipit-source-id: c006540097408ead8fb8c5aac3aaaa220c1a3951
---
 src/Client.js | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/Client.js b/src/Client.js
index 2499ca359..ea0c48eec 100644
--- a/src/Client.js
+++ b/src/Client.js
@@ -179,12 +179,14 @@ export default class Client extends EventEmitter {
             params.method,
             params.params,
           );
-          this.store.dispatch(
-            setPluginState({
-              pluginKey,
-              state: newPluginState,
-            }),
-          );
+          if (persistedState !== newPluginState) {
+            this.store.dispatch(
+              setPluginState({
+                pluginKey,
+                state: newPluginState,
+              }),
+            );
+          }
         } else {
           const apiCallbacks = this.broadcastCallbacks.get(params.api);
           if (!apiCallbacks) {