Confusion regarding speed parameter

Hello everyone. This is my time with Cooja simulation. As I start my simulation (all nodes within each others' gray/green circles), the speed is around 10, 12% in first 9 seconds and suddenly we see speeds of more than 100% afterwards.

My question is that : what does that indicate really? How to interprete it? Thank you.

Hi @umairjamali

you might need to provide some more context here. What does this have to do with Node-RED?