This fix is long coming. For a long time due to the addition of a
global user cache, the on_member_update event would only have the
updated user in the very first dispatch due to a quirk in the reference
only being updated once.
In order to fix this issue two things had to change:
1. There had to be a new event, `on_user_update` to complement
the equivalent member event.
2. Unnecessary copies of User had to be removed to compensate for the
performance hit from the diffing.
While doing these two fixes I also re-evaluated some more unnecessary
copies done during the PRESENCE_UPDATE to add member case while
fetch_offline_members=False is set or due to chunking issues. The
number of copies was brought down from 2 to 1, discounting the original
Member creation. Unsure on the benefits of this one, however.
N.B: this doesn't change the pre-existing behaviour of on_member_update
Remove the old and slow Member._copy implementation that was left over
by accident in 095f0ec. Since it was defined later it overrode the new
implementation and rendered it moot.
Introduce a new internal type, SnowflakeList, which has better memory
footprint over a regular list or set of roles. It is suspected that
there will be a 9x reduction of memory for every Emoji instance and a
48 byte saving per Member instance. However, these savings will
probably only be evident on larger bots.
As a consequence of this change, Member.roles is now computed lazily.
Currently I am not sure if I want to do the initial sorting on the
SnowflakeList for Member, as this comes with a O(n log n) cost when
creating a Member for little purpose since SnowflakeList.has is not
overly relied on. If CPU time becomes an issue this might change.
This adds the following APIs:
* Guild.get_role
This removes the following APIs:
* Guild.role_hierarchy
To compensate for the removed APIs, Guild.roles is now a sorted list
based on hierarchy. The first element will always be the @everyone
role.
This speeds up access at the cost of some memory, theoretically.
This is a massive breaking change.
* All references to "game" have been renamed to "activity"
* Activity objects contain a majority of the rich presence information
* Game and Streaming are subtypes for memory optimisation purposes for
the more common cases.
* Introduce a more specialised read-only type, Spotify, for the
official Spotify integration to make it easier to use.
This affects:
* Member.add_roles
* Member.remove_roles
This is the main attempt of fixing long standing bugs like #56. Since
cache consistency is too hard to ask for due to eventual consistency
and this generally being one of the only main roadblocks that the
cache ruins, it's best to just implement it in terms of the atomic
endpoint instead.
Fixes#56
