v+t slower but much better and reliable. Need to check ratelimits before speeding it up.

src/NadekoBot/Modules/Administration/Commands/ProtectionCommands.cs

@@ -105,18 +105,19 @@ namespace NadekoBot.Modules.Administration
                         antiSpamGuilds.TryAdd(gc.GuildId, new AntiSpamStats() { AntiSpamSettings = spam });
                 }
 
-                NadekoBot.Client.MessageReceived += async (imsg) =>
+                NadekoBot.Client.MessageReceived += (imsg) =>
-                {
-
-                    try
                 {
                     var msg = imsg as IUserMessage;
                     if (msg == null || msg.Author.IsBot)
-                            return;
+                        return Task.CompletedTask;
 
                     var channel = msg.Channel as ITextChannel;
                     if (channel == null)
-                            return;
+                        return Task.CompletedTask;
+                    var _ = Task.Run(async () =>
+                    {
+                        try
+                        {
                             AntiSpamStats spamSettings;
                             if (!antiSpamGuilds.TryGetValue(channel.Guild.Id, out spamSettings) ||
                                 spamSettings.AntiSpamSettings.IgnoredChannels.Contains(new AntiSpamIgnore()
@@ -126,7 +127,10 @@ namespace NadekoBot.Modules.Administration
                                 return;
 
                             var stats = spamSettings.UserStats.AddOrUpdate(msg.Author.Id, new UserSpamStats(msg.Content),
-                            (id, old) => { old.ApplyNextMessage(msg.Content); return old; });
+                                (id, old) =>
+                                {
+                                    old.ApplyNextMessage(msg.Content); return old;
+                                });
 
                             if (stats.Count >= spamSettings.AntiSpamSettings.MessageThreshold)
                             {
@@ -138,20 +142,24 @@ namespace NadekoBot.Modules.Administration
                             }
                         }
                         catch { }
+                    });
+                    return Task.CompletedTask;
                 };
 
-                NadekoBot.Client.UserJoined += async (usr) =>
+                NadekoBot.Client.UserJoined += (usr) =>
+                {
+                    if (usr.IsBot)
+                        return Task.CompletedTask;
+                    AntiRaidStats settings;
+                    if (!antiRaidGuilds.TryGetValue(usr.Guild.Id, out settings))
+                        return Task.CompletedTask;
+                    if (!settings.RaidUsers.Add(usr))
+                        return Task.CompletedTask;
+
+                    var _ = Task.Run(async () =>
                     {
                         try
                         {
-                        if (usr.IsBot)
-                            return;
-                        AntiRaidStats settings;
-                        if (!antiRaidGuilds.TryGetValue(usr.Guild.Id, out settings))
-                            return;
-                        if (!settings.RaidUsers.Add(usr))
-                            return;
-
                             ++settings.UsersCount;
 
                             if (settings.UsersCount >= settings.AntiRaidSettings.UserThreshold)
@@ -168,11 +176,14 @@ namespace NadekoBot.Modules.Administration
 
                         }
                         catch { }
+                    });
+                    return Task.CompletedTask;
                 };
             }
 
             private static async Task PunishUsers(PunishmentAction action, ProtectionType pt, params IGuildUser[] gus)
             {
+                _log.Warn($"[{pt}] - Punishing [{gus.Length}] users with [{action}] in {gus[0].Guild.Name} guild");
                 foreach (var gu in gus)
                 {
                     switch (action)

src/NadekoBot/Modules/Administration/Commands/VoicePlusTextCommands.cs

@@ -7,9 +7,11 @@ using NadekoBot.Services;
 using NLog;
 using System;
 using System.Collections.Concurrent;
+using System.Collections.Generic;
 using System.Diagnostics;
 using System.Linq;
 using System.Text.RegularExpressions;
+using System.Threading;
 using System.Threading.Tasks;
 
 namespace NadekoBot.Modules.Administration
@@ -22,6 +24,8 @@ namespace NadekoBot.Modules.Administration
             private static Regex channelNameRegex = new Regex(@"[^a-zA-Z0-9 -]", RegexOptions.Compiled);
 
             private static ConcurrentHashSet<ulong> voicePlusTextCache { get; }
+
+            private static ConcurrentDictionary<ulong, SemaphoreSlim> guildLockObjects = new ConcurrentDictionary<ulong, SemaphoreSlim>();
             static VoicePlusTextCommands()
             {
                 var _log = LogManager.GetCurrentClassLogger();
@@ -36,22 +40,26 @@ namespace NadekoBot.Modules.Administration
                 _log.Debug($"Loaded in {sw.Elapsed.TotalSeconds:F2}s");
             }
 
-            private static async Task UserUpdatedEventHandler(SocketUser iuser, SocketVoiceState before, SocketVoiceState after)
+            private static Task UserUpdatedEventHandler(SocketUser iuser, SocketVoiceState before, SocketVoiceState after)
             {
                 var user = (iuser as SocketGuildUser);
                 var guild = user?.Guild;
 
                 if (guild == null)
-                    return;
+                    return Task.CompletedTask;
 
-                try
-                {
                 var botUserPerms = guild.CurrentUser.GuildPermissions;
 
-                    if (before.VoiceChannel == after.VoiceChannel) return;
+                if (before.VoiceChannel == after.VoiceChannel)
+                    return Task.CompletedTask;
 
                 if (!voicePlusTextCache.Contains(guild.Id))
-                        return;
+                    return Task.CompletedTask;
+
+                var _ = Task.Run(async () =>
+                {
+                    try
+                    {
 
                         if (!botUserPerms.ManageChannels || !botUserPerms.ManageRoles)
                         {
@@ -71,43 +79,80 @@ namespace NadekoBot.Modules.Administration
                             return;
                         }
 
+                        var semaphore = guildLockObjects.GetOrAdd(guild.Id, (key) => new SemaphoreSlim(1, 1));
+
+                        try
+                        {
+                            await semaphore.WaitAsync().ConfigureAwait(false);
 
                             var beforeVch = before.VoiceChannel;
                             if (beforeVch != null)
                             {
-                        var textChannel = guild.TextChannels.Where(t => t.Name == GetChannelName(beforeVch.Name).ToLowerInvariant()).FirstOrDefault();
+                                var beforeRoleName = GetRoleName(beforeVch);
-                        if (textChannel != null)
+                                var beforeRole = guild.Roles.FirstOrDefault(x => x.Name == beforeRoleName);
-                            await textChannel.AddPermissionOverwriteAsync(user,
+                                if (beforeRole != null)
-                                new OverwritePermissions(readMessages: PermValue.Deny,
+                                    try
-                                                   sendMessages: PermValue.Deny)).ConfigureAwait(false);
+                                    {
+                                        _log.Warn("Removing role " + beforeRoleName + " from user " + user.Username);
+                                        await user.RemoveRolesAsync(beforeRole).ConfigureAwait(false);
+                                        await Task.Delay(200).ConfigureAwait(false);
+                                    }
+                                    catch (Exception ex)
+                                    {
+                                        _log.Warn(ex);
+                                    }
                             }
                             var afterVch = after.VoiceChannel;
                             if (afterVch != null && guild.AFKChannel?.Id != afterVch.Id)
                             {
+                                var roleName = GetRoleName(afterVch);
+                                IRole roleToAdd = guild.Roles.FirstOrDefault(x => x.Name == roleName);
+                                if (roleToAdd == null)
+                                    roleToAdd = await guild.CreateRoleAsync(roleName).ConfigureAwait(false);
+
                                 ITextChannel textChannel = guild.TextChannels
                                                             .Where(t => t.Name == GetChannelName(afterVch.Name).ToLowerInvariant())
                                                             .FirstOrDefault();
                                 if (textChannel == null)
                                 {
-                            textChannel = (await guild.CreateTextChannelAsync(GetChannelName(afterVch.Name).ToLowerInvariant()).ConfigureAwait(false));
+                                    var created = (await guild.CreateTextChannelAsync(GetChannelName(afterVch.Name).ToLowerInvariant()).ConfigureAwait(false));
-                            await textChannel.AddPermissionOverwriteAsync(guild.EveryoneRole,
+
-                                new OverwritePermissions(readMessages: PermValue.Deny,
+                                    try { await guild.CurrentUser.AddRolesAsync(roleToAdd).ConfigureAwait(false); } catch { }
-                                                   sendMessages: PermValue.Deny)).ConfigureAwait(false);
+                                    await Task.Delay(50).ConfigureAwait(false);
+                                    await created.AddPermissionOverwriteAsync(roleToAdd, new OverwritePermissions(
+                                        readMessages: PermValue.Allow,
+                                        sendMessages: PermValue.Allow))
+                                            .ConfigureAwait(false);
+                                    await Task.Delay(50).ConfigureAwait(false);
+                                    await created.AddPermissionOverwriteAsync(guild.EveryoneRole, new OverwritePermissions(
+                                        readMessages: PermValue.Deny,
+                                        sendMessages: PermValue.Deny))
+                                            .ConfigureAwait(false);
+                                    await Task.Delay(50).ConfigureAwait(false);
                                 }
-                        await textChannel.AddPermissionOverwriteAsync(user,
+                                _log.Warn("Adding role " + roleToAdd.Name + " to user " + user.Username);
-                            new OverwritePermissions(readMessages: PermValue.Allow,
+                                await user.AddRolesAsync(roleToAdd).ConfigureAwait(false);
-                                                    sendMessages: PermValue.Allow)).ConfigureAwait(false);
+                            }
+                        }
+                        finally
+                        {
+                            semaphore.Release();
                         }
                     }
                     catch (Exception ex)
                     {
-                    Console.WriteLine(ex);
+                        _log.Warn(ex);
                     }
+                });
+                return Task.CompletedTask;
             }
 
             private static string GetChannelName(string voiceName) =>
                 channelNameRegex.Replace(voiceName, "").Trim().Replace(" ", "-").TrimTo(90, true) + "-voice";
 
+            private static string GetRoleName(IVoiceChannel ch) =>
+                "nvoice-" + ch.Id;
+
             [NadekoCommand, Usage, Description, Aliases]
             [RequireContext(ContextType.Guild)]
             [RequireUserPermission(GuildPermission.ManageRoles)]
@@ -127,7 +172,7 @@ namespace NadekoBot.Modules.Administration
                 {
                     try
                     {
-                        await Context.Channel.SendErrorAsync("⚠️ You are enabling this feature and **I do not have ADMINISTRATOR permissions**. " +
+                        await Context.Channel.SendErrorAsync("⚠️ You are enabling/disabling this feature and **I do not have ADMINISTRATOR permissions**. " +
                       "`This may cause some issues, and you will have to clean up text channels yourself afterwards.`");
                     }
                     catch { }
@@ -147,6 +192,13 @@ namespace NadekoBot.Modules.Administration
                         foreach (var textChannel in (await guild.GetTextChannelsAsync().ConfigureAwait(false)).Where(c => c.Name.EndsWith("-voice")))
                         {
                             try { await textChannel.DeleteAsync().ConfigureAwait(false); } catch { }
+                            await Task.Delay(500).ConfigureAwait(false);
+                        }
+
+                        foreach (var role in guild.Roles.Where(c => c.Name.StartsWith("nvoice-")))
+                        {
+                            try { await role.DeleteAsync().ConfigureAwait(false); } catch { }
+                            await Task.Delay(500).ConfigureAwait(false);
                         }
                         await Context.Channel.SendConfirmAsync("ℹ️ Successfuly **removed** voice + text feature.").ConfigureAwait(false);
                         return;
@@ -163,7 +215,9 @@ namespace NadekoBot.Modules.Administration
             [NadekoCommand, Usage, Description, Aliases]
             [RequireContext(ContextType.Guild)]
             [RequireUserPermission(GuildPermission.ManageChannels)]
+            [RequireBotPermission(GuildPermission.ManageChannels)]
             [RequireUserPermission(GuildPermission.ManageRoles)]
+            //[RequireBotPermission(GuildPermission.ManageRoles)]
             public async Task CleanVPlusT()
             {
                 var guild = Context.Guild;
@@ -174,15 +228,27 @@ namespace NadekoBot.Modules.Administration
                     return;
                 }
 
-                var allTxtChannels = (await guild.GetTextChannelsAsync()).Where(c => c.Name.EndsWith("-voice"));
+                var textChannels = await guild.GetTextChannelsAsync().ConfigureAwait(false);
-                var validTxtChannelNames = (await guild.GetVoiceChannelsAsync()).Select(c => GetChannelName(c.Name).ToLowerInvariant());
+                var voiceChannels = await guild.GetVoiceChannelsAsync().ConfigureAwait(false);
 
-                var invalidTxtChannels = allTxtChannels.Where(c => !validTxtChannelNames.Contains(c.Name));
+                var boundTextChannels = textChannels.Where(c => c.Name.EndsWith("-voice"));
+                var validTxtChannelNames = new HashSet<string>(voiceChannels.Select(c => GetChannelName(c.Name).ToLowerInvariant()));
+                var invalidTxtChannels = boundTextChannels.Where(c => !validTxtChannelNames.Contains(c.Name));
 
                 foreach (var c in invalidTxtChannels)
                 {
                     try { await c.DeleteAsync().ConfigureAwait(false); } catch { }
-                    await Task.Delay(500);
+                    await Task.Delay(500).ConfigureAwait(false);
+                }
+                
+                var boundRoles = guild.Roles.Where(r => r.Name.StartsWith("nvoice-"));
+                var validRoleNames = new HashSet<string>(voiceChannels.Select(c => GetRoleName(c).ToLowerInvariant()));
+                var invalidRoles = boundRoles.Where(r => !validRoleNames.Contains(r.Name));
+
+                foreach (var r in invalidRoles)
+                {
+                    try { await r.DeleteAsync().ConfigureAwait(false); } catch { }
+                    await Task.Delay(500).ConfigureAwait(false);
                 }
 
                 await Context.Channel.SendConfirmAsync("Cleaned v+t.").ConfigureAwait(false);

src/NadekoBot/NadekoBot.cs

@@ -113,7 +113,7 @@ namespace NadekoBot
             
             await CommandHandler.StartHandling().ConfigureAwait(false);
 
-            await CommandService.AddModulesAsync(this.GetType().GetTypeInfo().Assembly).ConfigureAwait(false);
+            var _ = await Task.Run(() => CommandService.AddModulesAsync(this.GetType().GetTypeInfo().Assembly)).ConfigureAwait(false);
 #if !GLOBAL_NADEKO
             await CommandService.AddModuleAsync<Music>().ConfigureAwait(false);
 #endif