Show max latency on client's status bar

remoting/base/running_max.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "remoting/base/running_average.h"
+#include "remoting/base/running_max.h"

[Yuwei, 2016/03/17 18:50:21]

running_max.h and running_max.cc are copied and modified from running_average.*.

Looks like I should have written unit test for this. Will figure out how to do
so.

 
 #include "base/logging.h"
 
 namespace remoting {
 
-RunningAverage::RunningAverage(int window_size)
-    : window_size_(window_size),
-      sum_(0) {
+RunningMax::RunningMax(int window_size)
+    : window_size_(window_size) {
   DCHECK_GT(window_size, 0);
 }
 
-RunningAverage::~RunningAverage() {}
+RunningMax::~RunningMax() {}
 
-void RunningAverage::Record(int64_t value) {
+void RunningMax::Record(int64_t value) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   data_points_.push_back(value);
-  sum_ += value;
 
   if (data_points_.size() > window_size_) {
-    sum_ -= data_points_[0];
     data_points_.pop_front();
   }
 }
 
-double RunningAverage::Average() {
+int64_t RunningMax::Max() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (data_points_.empty())
     return 0;
-  return static_cast<double>(sum_) / data_points_.size();
+
+  // O(n*w), may be improved.
+  return *std::max_element(data_points_.begin(), data_points_.end());
 }
 
-}  // namespace remoting
+}  // namespace remoting