ROS subscriber slowing sim down

I am using pegasus Simulator to simulate a px4 iris in Isaacsim and am publishing camera topics through the isaac ros node(ros2 humble) . However when i try to connect through mavros through a UDP connection from another system , Once i subscribe to the image topic it slows down the simulation drsastically , any workarounds around this ? The network i used to send these messages had no other traffic other than these messages . These are the ros2 camera helper parameters will changing anything here work ?