Make the largest loops lazier and async to avoid blocking (#3767)

* lets reduce config calls here

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Lets normalize how we name config attributes across the bot.

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* ....

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Just a tiny PR improving config call in a lot of places (Specially events and Help)

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* stop using `bot.guilds` in `on_command_add`

* Just a tiny PR improving config call in a lot of places (Specially events and Help)

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* missed this one

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* nothing to see here

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* lets reduce config calls here

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Just a tiny PR improving config call in a lot of places (Specially events and Help)

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* stop using `bot.guilds` in `on_command_add`

* missed this one

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* welp

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* welp

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* welp

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* jack

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Update redbot/cogs/mod/kickban.py

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/cogs/filter/filter.py

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* jack

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* make all large loops async to avoid blocking larger bots

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* ...

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* okay now working AsyncGen

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* may or may not have forgotten black

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Apply suggestions from code review

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* jack's review

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* DOCS

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* DOCS

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Apply suggestions from code review

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* jack

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

* Apply suggestions from code review

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/core/utils/__init__.py

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* Update redbot/core/utils/__init__.py

Co-Authored-By: jack1142 <6032823+jack1142@users.noreply.github.com>

* avoid loop if possible and if not only iterate once

Signed-off-by: Drapersniper <27962761+drapersniper@users.noreply.github.com>

Co-authored-by: jack1142 <6032823+jack1142@users.noreply.github.com>

redbot/cogs/admin/announcer.py

@@ -3,6 +3,7 @@ import asyncio
 import discord
 from redbot.core import commands
 from redbot.core.i18n import Translator
+from redbot.core.utils import AsyncIter
 from redbot.core.utils.chat_formatting import humanize_list, inline
 
 _ = Translator("Announcer", __file__)
@@ -55,7 +56,7 @@ class Announcer:
     async def announcer(self):
         guild_list = self.ctx.bot.guilds
         failed = []
-        for g in guild_list:
+        async for g in AsyncIter(guild_list, delay=0.5):
             if not self.active:
                 return
 
@@ -68,7 +69,6 @@ class Announcer:
                 await channel.send(self.message)
             except discord.Forbidden:
                 failed.append(str(g.id))
-            await asyncio.sleep(0.5)
 
         if failed:
             msg = (