Few changes

Added config ini file
Added internal cache to reduce callExtension times

build.bat

@@ -7,6 +7,7 @@ mkdir @ExileLootDrop\addons
 %MSBUILD% src\ExileLootDrop.sln /property:Configuration=release /target:Rebuild /verbosity:normal /nologo
 copy src\ExileLootDrop\bin\Release\ExileLootDrop.dll @ExileLootDrop
 copy src\ExileLootDrop\bin\Release\ExileLootDrop.cfg @ExileLootDrop
+copy src\ExileLootDrop\bin\Release\ExileLootDrop.ini @ExileLootDrop
 copy src\ExileLootDropTester\bin\Release\ExileLootDropTester.exe @ExileLootDrop
 copy LICENSE.txt @ExileLootDrop
 copy README.md @ExileLootDrop

src/ExileLootDrop/ExileLootDrop.csproj

@@ -47,6 +47,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="DllEntry.cs" />
+    <Compile Include="IniParser.cs" />
     <Compile Include="Logger.cs" />
     <Compile Include="Loot.cs" />
     <Compile Include="CfgGroup.cs" />
@@ -63,6 +64,9 @@
     <None Include="ExileLootDrop.cfg">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Include="ExileLootDrop.ini">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Include="packages.config" />
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />

src/ExileLootDrop/ExileLootDrop.ini

@@ -0,0 +1,3 @@
+[General]
+LootCfg=ExileLootDrop.cfg
+CacheItems=50000

src/ExileLootDrop/IniParser.cs

@@ -0,0 +1,199 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ExileLootDrop
+{
+    public class IniParser
+    {
+        private readonly string _iniFilePath;
+        private readonly Hashtable _keyPairs = new Hashtable();
+        private readonly List<SectionPair> _tmpList = new List<SectionPair>();
+
+        public readonly string Name;
+
+        public IniParser(string iniPath)
+        {
+            string str2 = null;
+            _iniFilePath = iniPath;
+            Name = Path.GetFileNameWithoutExtension(iniPath);
+
+            if (!File.Exists(iniPath))
+                throw new FileNotFoundException("Unable to locate " + iniPath);
+
+            using (TextReader reader = new StreamReader(iniPath))
+            {
+                for (var str = reader.ReadLine(); str != null; str = reader.ReadLine())
+                {
+                    str = str.Trim();
+                    if (str == "")
+                        continue;
+
+                    if (str.StartsWith("[") && str.EndsWith("]"))
+                        str2 = str.Substring(1, str.Length - 2);
+                    else
+                    {
+                        SectionPair pair;
+
+                        if (str.StartsWith(";"))
+                            str = str.Replace("=", "%eq%") + @"=%comment%";
+
+                        var strArray = str.Split(new[] { '=' }, 2);
+                        string str3 = null;
+                        if (str2 == null)
+                        {
+                            str2 = "ROOT";
+                        }
+                        pair.Section = str2;
+                        pair.Key = strArray[0];
+                        if (strArray.Length > 1)
+                        {
+                            str3 = strArray[1];
+                        }
+                        _keyPairs.Add(pair, str3);
+                        _tmpList.Add(pair);
+                    }
+                }
+            }
+        }
+
+        public void AddSetting(string sectionName, string settingName)
+        {
+            AddSetting(sectionName, settingName, null);
+        }
+
+        public void AddSetting(string sectionName, string settingName, string settingValue)
+        {
+            SectionPair pair;
+            pair.Section = sectionName;
+            pair.Key = settingName;
+            if (_keyPairs.ContainsKey(pair))
+            {
+                _keyPairs.Remove(pair);
+            }
+            if (_tmpList.Contains(pair))
+            {
+                _tmpList.Remove(pair);
+            }
+            _keyPairs.Add(pair, settingValue);
+            _tmpList.Add(pair);
+        }
+
+        public int Count()
+        {
+            return Sections.Length;
+        }
+
+        public void DeleteSetting(string sectionName, string settingName)
+        {
+            SectionPair pair;
+            pair.Section = sectionName;
+            pair.Key = settingName;
+            if (!_keyPairs.ContainsKey(pair)) return;
+            _keyPairs.Remove(pair);
+            _tmpList.Remove(pair);
+        }
+
+        public string[] EnumSection(string sectionName)
+        {
+            return (from pair in _tmpList where !pair.Key.StartsWith(";") where pair.Section == sectionName select pair.Key).ToArray();
+        }
+
+        public string[] Sections => (from pair in _tmpList
+                                     group pair by pair.Section into bySection
+                                     from IGrouping<string, SectionPair> g in bySection
+                                     select g.Key).ToArray();
+
+        public string GetSetting(string sectionName, string settingName, string defaultValue = "")
+        {
+            SectionPair pair;
+            pair.Section = sectionName;
+            pair.Key = settingName;
+            return !_keyPairs.ContainsKey(pair) ? defaultValue : ((string)_keyPairs[pair]).Trim();
+        }
+
+        public bool GetBoolSetting(string sectionName, string settingName, bool defaultValue = false)
+        {
+            if (defaultValue)
+                return (GetSetting(sectionName, settingName).ToLower() != "false");
+            return (GetSetting(sectionName, settingName).ToLower() == "true");
+        }
+
+        public void Save()
+        {
+            SaveSettings(_iniFilePath);
+        }
+
+        public void SaveSettings(string newFilePath)
+        {
+            var list = new ArrayList();
+            var str2 = "";
+            foreach (var pair in _tmpList.Where(pair => !list.Contains(pair.Section)))
+            {
+                list.Add(pair.Section);
+            }
+            foreach (string str3 in list)
+            {
+                str2 = str2 + "[" + str3 + "]\r\n";
+                foreach (var pair2 in _tmpList)
+                {
+                    if (pair2.Section == str3)
+                    {
+                        var str = (string)_keyPairs[pair2];
+                        if (str != null)
+                        {
+                            if (str == "%comment%")
+                            {
+                                str = "";
+                            }
+                            else
+                            {
+                                str = "=" + str;
+                            }
+                        }
+                        str2 = str2 + pair2.Key.Replace("%eq%", "=") + str + "\r\n";
+                    }
+                }
+                str2 = str2 + "\r\n";
+            }
+
+            using (TextWriter writer = new StreamWriter(newFilePath))
+                writer.Write(str2);
+        }
+
+        public void SetSetting(string sectionName, string settingName, string value)
+        {
+            SectionPair pair;
+            pair.Section = sectionName;
+            pair.Key = settingName;
+            if (_keyPairs.ContainsKey(pair))
+            {
+                _keyPairs[pair] = value;
+            }
+            else
+            {
+                AddSetting(sectionName, settingName, value);
+            }
+        }
+
+        public bool ContainsSetting(string sectionName, string settingName)
+        {
+            SectionPair pair;
+            pair.Section = sectionName;
+            pair.Key = settingName;
+            return _keyPairs.Contains(pair);
+        }
+
+        [StructLayout(LayoutKind.Sequential)]
+        private struct SectionPair
+        {
+            public string Section;
+            public string Key;
+        }
+    }
+}

src/ExileLootDrop/Loot.cs

@@ -56,13 +56,22 @@ namespace ExileLootDrop
         
         private readonly List<CfgGroup> _cfgGroups;
         private Dictionary<string, LootTable> Table { get; } = new Dictionary<string, LootTable>();
-        
+
         /// <summary>
         /// Loot constructor
         /// </summary>
         private Loot()
         {
-            const string cfgpath = "ExileLootDrop.cfg";
+            var assembly = Assembly.GetExecutingAssembly();
+            var assemblyName = Path.GetFileNameWithoutExtension(assembly.Location);
+            var iniPath = Path.Combine(BasePath, $"{assemblyName}.ini");
+            if (!File.Exists(iniPath))
+                throw new LootException($"{assemblyName}.ini was not found");
+            
+            var ini = new IniParser(iniPath);
+            var cfgpath = ini.GetSetting("General", "LootCfg", "ExileLootDrop.cfg");
+            var cacheCount = Convert.ToInt32(ini.GetSetting("General", "CacheItems", "0"));
+            
             Logger.LoggerHandlerManager.AddHandler(new ConsoleLoggerHandler());
             var logfile = Path.Combine(BasePath, "output.log");
             try
@@ -98,11 +107,11 @@ namespace ExileLootDrop
             foreach (var group in _cfgGroups)
             {
                 var list = FlattenGroups(group);
-                var table = new LootTable(group.Name, list);
+                var table = new LootTable(group.Name, list, cacheCount);
                 Table.Add(group.Name, table);
             }
             var span = DateTime.Now - start;
-            Logger.Log<Loot>($"Took {span.Milliseconds}ms to load and parse loot cfg");
+            Logger.Log<Loot>($"Took {span.TotalMilliseconds}ms to load and parse loot cfg");
         }
         
         /// <summary>
@@ -157,11 +166,11 @@ namespace ExileLootDrop
             if (!Table.ContainsKey(table))
                 throw new LootTableNotFoundException($"No loot table called {table}");
 
-            var items = new List<string>();
+            var items = new string[count];
             for (var i = 0; i < count; i++)
-                items.Add(Table[table].Drop());
+                items[i] = Table[table].Drop();
 
-            return items.ToArray();
+            return items;
         }
 
         /// <summary>

src/ExileLootDrop/LootTable.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace ExileLootDrop
 {
@@ -16,14 +17,18 @@ namespace ExileLootDrop
         public LootItem[] LootItems { get; }
 
         private readonly Random _rnd = new Random();
+        private readonly int _cacheCount;
+        private int _cachePtr;
+        private readonly LootItem[] _cacheItems;
 
         /// <summary>
         /// LootTable constuctor
         /// </summary>
         /// <param name="name">Table name</param>
         /// <param name="lootList">Item list</param>
-        public LootTable(string name, List<LootItem> lootList)
+        public LootTable(string name, List<LootItem> lootList, int cacheCount = 0)
         {
+            _cacheCount = cacheCount;
             Name = name;
             var sum = 0m;
             lootList.ForEach(i =>
@@ -32,6 +37,19 @@ namespace ExileLootDrop
                 i.Sum = sum;
             });
             LootItems = lootList.ToArray();
+            Logger.Log<LootTable>($"Pre caching loot for {Name}");
+            var cache = new List<LootItem>();
+            for (var i = 0; i < _cacheCount; i++)
+            {
+                var rnd = (decimal)_rnd.NextDouble();
+                foreach (var item in LootItems.Where(item => item.Sum >= rnd))
+                {
+                    cache.Add(item);
+                    break;
+                }
+            }
+            _cachePtr = 0;
+            _cacheItems = cache.ToArray();
         }
 
         /// <summary>
@@ -40,6 +58,11 @@ namespace ExileLootDrop
         /// <returns>Item classname</returns>
         public string Drop()
         {
+            if (_cacheCount != 0 && _cachePtr < _cacheCount)
+            {
+                return _cacheItems[_cachePtr++].Item;
+            }
+
             var rnd = (decimal)_rnd.NextDouble();
             foreach (var item in LootItems)
             {

src/ExileLootDropTester/Program.cs

@@ -7,7 +7,7 @@ namespace ExileLootDropTester
 {
     class Program
     {
-        const int Loops = 1000000;
+        const int Loops = 50000;
 
         static void Main(string[] args)
         {