The chat has a message queue size of 200 while you can only see the last 5 messages.
When this queue is full many people will get a CPU spike with every new incoming message.
This mod sets the queue to a solid size of 20 so the lag doesn't get caused. And the chat still can keep up with many new messages.
The performance graph shows the cpu response in yellow. You can see 3 spikes that all appeared when a message came in.
