[release/8.0] SignalR performance: track groups per connection, remove on disconnect #53862
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Co-authored-by: Brennan <[email protected]>
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Backport of #53486 to release/8.0
/cc @BrennanConroy @alex-jitbit
SignalR performance: track groups per connection, remove on disconnect
Description
Customer reported slow down on connection disconnect. Both 1st party and 3rd party customers have reported issues here.
Fixes #48249
Customer Impact
When lots of groups are used and connection(s) disconnect it results in significant CPU usage. The 1st party customer is currently using private reflection to fix this issue, but that is definitely not a recommended path forward.
Regression?
Risk
Code change is relatively simple. We have very similar code for an equivalent component. (RedisHublifetimeManager)
Verification
Packaging changes reviewed?