Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Configuration/System/Configuration/ClientConfigPerf.cs

@@ -0,0 +1,97 @@
+//------------------------------------------------------------------------------
+// <copyright file="ClientConfigPerf.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Configuration {
+    using System.Configuration.Internal;
+    using System.Globalization;
+    using System.Collections;
+    using System.IO;
+    using System.Xml;
+    using System.Security;
+    using System.Security.Permissions;
+    using System.Threading;
+    using System.Net;
+    using Assembly = System.Reflection.Assembly;
+    using StringBuilder = System.Text.StringBuilder;
+
+#if NOPERF
+    internal class ClientConfigPerf {
+        const int SIZE=100;
+
+        long[]      _counters;
+        long[]      _totals;
+        string[]    _names;
+        int         _current;
+        bool        _enabled;
+
+        static internal ClientConfigPerf ConfigSystem = new ClientConfigPerf(false);
+        static internal ClientConfigPerf ScanSections = new ClientConfigPerf(false);
+        static internal ClientConfigPerf CopySection = new ClientConfigPerf(false);
+        static internal ClientConfigPerf CopyXmlNode = new ClientConfigPerf(false);
+        static internal ClientConfigPerf GetConfig = new ClientConfigPerf(true);
+
+        ClientConfigPerf(bool enabled) {
+#if PERF
+            _enabled = enabled;
+            if (_enabled) {
+                _counters = new long[SIZE];
+                _totals = new long[SIZE];
+                _names = new string[SIZE];
+            }
+#endif
+        }
+
+        internal void Reset() {
+#if PERF
+            _current = 0;
+#endif
+        }
+
+        internal void Record(string name) {
+#if PERF
+            if (_enabled && _current < _counters.Length) {
+                _names[_current] = name;
+                Microsoft.Win32.SafeNativeMethods.QueryPerformanceCounter(out _counters[_current]);
+                if (_current > 0) {
+                    _totals[_current] += _counters[_current] - _counters[_current - 1];
+                }
+
+                _current++;
+            }
+#endif
+        }
+
+        void DoPrint() {
+#if PERF
+            if (_enabled) {
+                long lfreq = 0;
+                Microsoft.Win32.SafeNativeMethods.QueryPerformanceFrequency(out lfreq);
+                double freq = (double) lfreq;
+                double grandtotal = 0;
+
+                for (int i = 0; i < _current; i++) {
+                    double time = ((double)_totals[i]) / freq;
+                    grandtotal += time;
+                    Console.WriteLine("{0,-20} : {1:F6}", _names[i], time);
+                }
+
+                Console.WriteLine("{0,-20} : {1:F6}\n", "TOTAL", grandtotal);
+            }
+#endif
+        }
+
+        public static void Print() {
+#if PERF
+            ConfigSystem.DoPrint();
+            ScanSections.DoPrint();
+            CopySection.DoPrint();
+            CopyXmlNode.DoPrint();
+            GetConfig.DoPrint();
+#endif
+        }
+    }
+#endif
+}