If you are running Target Events or the Portal Gun, type cancel($SpaceMods::SpaceTick); into the console. Those Add-Ons will stop working but it will stop console spam via schedules. You can use spaceTick(); to start it again.
Disable any mods you have such as your 150ms-spam-loop that do the same.
Looking around via the mouse can cause console spam as it registers every slight change in the position. Try to set things up so you can use just the WASD keys or click "fire" when tracing events.
Make sure nobody else is in your server when you do it. Anything they do, like move, die, get hurt or fire weapons will cause messages to show up in the console.
trace reports every non-engineside function call that happens - try to cut down on unnecessary events and activities while using it.
