Does it Race?

In reply to dave_59:

Thank you Dave. Always been curious about $time vs $realtime, can you direct me some resources in order to capture the reason?

For me, simulation regions are not %100 understood. Do we really need to be aware how it progress? There may not be situations where moving to later regions is really required? Or mostly unnecessary? Can you elaborate a little bit more? Also, please throw me some resources on techniques related to moving the region. That may help me to recognize the details.