Multiple camera views, low frame rate(Performance Redundancy)

Isaac Sim Version

4.2.0

Operating System

Ubuntu 22.04

Detailed Description

Multiple camera views, low frame rate.
When I only have one view, the frame rate is 60hz, and when I start four views, the frame rate is 13.7hz, but the host’s performance is not fully utilized, and there is still a large redundancy in CPU, GPU and memory.
Question:

  1. What is the reason?
  2. What are the optimization methods?