optimisation: Populate data caches on startup.

bot/core/module.py

@@ -40,6 +40,32 @@ def setting_initialisation(client):
         setting.init_task(client)
 
 
+@module.launch_task
+async def preload_guild_configuration(client):
+    """
+    Loads the plain guild configuration for all guilds the client is part of into data.
+    """
+    guildids = [guild.id for guild in client.guilds]
+    rows = client.data.guild_config.fetch_rows_where(guildid=guildids)
+    client.log(
+        "Preloaded guild configuration for {} guilds.".format(len(rows)),
+        context="CORE_LOADING"
+    )
+
+
+@module.launch_task
+async def preload_studying_members(client):
+    """
+    Loads the member data for all members who are currently in voice channels.
+    """
+    userids = list(set(member.id for guild in client.guilds for ch in guild.voice_channels for member in ch.members))
+    rows = client.data.lions.fetch_rows_where(userid=userids)
+    client.log(
+        "Preloaded member data for {} members.".format(len(rows)),
+        context="CORE_LOADING"
+    )
+
+
 @module.launch_task
 async def launch_lion_sync_loop(client):
     asyncio.create_task(_lion_sync_loop())