Unnecessary stutter?

At places like Caldera, the first 5-10 seconds after I have enterd this city(as in standing in the streets). Stutter appears.

This is the most noticeable if I am in a inside area in Caldera, and from there I go to the outside. Doing this procedure, I experience quite immense stutter in the first 1-3 seconds.

I could be death wrong, but I noticed when I enter the street/outside area of Caldera. The lamps are moving a bit, and the movement of this lamps stops after a while. All the lamps do this movement in the same exact sequel. When the lamps stops moving, the stutter disseapers.

Is there any way to delete this lamp movement? Because I think the stutter is related with the lamps movement.

Edit: A second thing I noticed, and yet again I could be death wrong. A area which contains a high ammount of grabeable torches, posseses a constant game stutter. I noticed this because in areas where the sound of burning torches is high(due the huge ammount of this torches), there is also a constant stutter. This edited paragraph could do more observation though, not quite sure about this one.