Make average BatchFetchQueue consume less memory

Description

BatchFetchQueue contains several heavy collections. A single BatchFetchQueue if instantiated is likely going to use these, but it might only need a few of these - so making them all lazily initialized seems beneficial.

Environment

None

Status

Assignee

Sanne Grinovero

Reporter

Sanne Grinovero

Fix versions

Labels

backPortable

Backport?

Suitable for new contributors

None

Requires Release Note

None

Pull Request

None

backportDecision

None

Components

Priority

Minor
Configure