1x1x141 Digfoot

So, my MC and I are working towards decreasing the amount of lag on our riding sims. We are working on decreasing our script time and increasing spare time to improve rides, and we are using the region scripts in the estate menu to find scripted objects and their locations to either take them out completely, or to change them to a lower script use object. I recently came across an article that referenced seeing where lag issues were by using Ctrl+Alt+Shift+U. there are red bubbles, and blue bubbles and now and then a green bubble. What do the differnet colors for these bubbles mean? And is this something that would assist us in improving esperiences on the sims we have? These are MOTROCYCLE RIDING SIMS~ and tickets filed already with LL have stated we must reduce to below 10 on script time and be above 10 on spare time! NOTHING in either ticket said anything about texture lag. I'm asking about the bubbles in Ctrl+Alt+Shift+U and what their colors mean. Could someone please explain what they mean to me, and if using this is a valuable tool for achieving what LL set forth for us? Thank you.