From 8cabdbae1e7b78cde00d9727838c9093812bcd55 Mon Sep 17 00:00:00 2001
From: Mike Armstrong <mikea@fb.com>
Date: Tue, 29 Dec 2015 23:36:34 -0800
Subject: [PATCH] Report jsc memory information to fbsystrace

Reviewed By: jspahrsummers

Differential Revision: D2789593

fb-gh-sync-id: e31d5f174b9cf896ce3be6431d81264d1d240fdb
---
 Libraries/Utilities/MessageQueue.js |  1 +
 Libraries/Utilities/Systrace.js     | 12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/Libraries/Utilities/MessageQueue.js b/Libraries/Utilities/MessageQueue.js
index e95dcb385..1bd46424d 100644
--- a/Libraries/Utilities/MessageQueue.js
+++ b/Libraries/Utilities/MessageQueue.js
@@ -147,6 +147,7 @@ class MessageQueue {
       this._queue = [[],[],[]];
       this._lastFlush = now;
     }
+    Systrace.counterEvent('pending_js_to_native_queue', this._queue[0].length);
     if (__DEV__ && SPY_MODE && isFinite(module)) {
       console.log('JS->N : ' + this._remoteModuleTable[module] + '.' +
         this._remoteMethodTable[module][method] + '(' + JSON.stringify(params) + ')');
diff --git a/Libraries/Utilities/Systrace.js b/Libraries/Utilities/Systrace.js
index ffd58715d..0e11e8942 100644
--- a/Libraries/Utilities/Systrace.js
+++ b/Libraries/Utilities/Systrace.js
@@ -92,6 +92,18 @@ var Systrace = {
     }
   },
 
+  /**
+   * counterEvent registers the value to the profileName on the systrace timeline
+  **/
+  counterEvent(profileName?: any, value?: any) {
+    if (_enabled) {
+      profileName = typeof profileName === 'function' ?
+        profileName() : profileName;
+      global.nativeTraceCounter &&
+        global.nativeTraceCounter(TRACE_TAG_REACT_APPS, profileName, value);
+    }
+  },
+
   reactPerfMeasure(objName: string, fnName: string, func: any): any {
     return function (component) {
       if (!_enabled) {