If you are experience stutters of up to a second when playing Wildlands, it can be related to heavy disk drive usage during autosaves. Even though Wildlands auto saves are small files, this can disrupt smooth gameplay.

To resolve this move the Uplay game save folder to an SSD drive rather than a HDD drive as the faster access times can elimiate this problem totally. 

Note that installing Ghost Recon Wildlands on an SSD drive improves general game peformance.