Time difference, between a port and a mirror port?

[GuillermoBartolomeHerrador]

What is the time difference of the arrival of a packet between a port and a mirror port?

I am working with Catalyst 2960 Switch.

Thank you 

[balaji.bandi]

Good question - It all depends on the resource availability on the device, I do not have in-hand information to share - as I recollect it was 50-60ms for the SPAN port.