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Optimise createRoom with multiple invites (#8559)
By not dropping the membership lock between invites, we can stop joins from grabbing the lock when we're half-done and slowing the whole thing down.
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3 changed files with 25 additions and 13 deletions
1
changelog.d/8559.misc
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1
changelog.d/8559.misc
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Optimise `/createRoom` with multiple invited users.
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@ -771,15 +771,22 @@ class RoomCreationHandler(BaseHandler):
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ratelimit=False,
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)
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for invitee in invite_list:
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# we avoid dropping the lock between invites, as otherwise joins can
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# start coming in and making the createRoom slow.
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#
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# we also don't need to check the requester's shadow-ban here, as we
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# have already done so above (and potentially emptied invite_list).
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with (await self.room_member_handler.member_linearizer.queue((room_id,))):
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content = {}
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is_direct = config.get("is_direct", None)
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if is_direct:
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content["is_direct"] = is_direct
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# Note that update_membership with an action of "invite" can raise a
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# ShadowBanError, but this was handled above by emptying invite_list.
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_, last_stream_id = await self.room_member_handler.update_membership(
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for invitee in invite_list:
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(
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_,
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last_stream_id,
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) = await self.room_member_handler.update_membership_locked(
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requester,
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UserID.from_string(invitee),
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room_id,
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@ -307,7 +307,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
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key = (room_id,)
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with (await self.member_linearizer.queue(key)):
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result = await self._update_membership(
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result = await self.update_membership_locked(
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requester,
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target,
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room_id,
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@ -322,7 +322,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
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return result
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async def _update_membership(
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async def update_membership_locked(
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self,
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requester: Requester,
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target: UserID,
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@ -335,6 +335,10 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
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content: Optional[dict] = None,
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require_consent: bool = True,
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) -> Tuple[str, int]:
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"""Helper for update_membership.
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Assumes that the membership linearizer is already held for the room.
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"""
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content_specified = bool(content)
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if content is None:
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content = {}
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