hummm,
a lot of reading and watching is ahead of you
yes, that is what I call it. "Stuttering"
If a scrap mod has caused it then, Sorry.
still, there is much that can help in the future all-around, but Fo4 is prone to "Stuttering" as the system becomes more and more taxed. So, whatever the cause it isn't uncommon but there are levels of how bad it can become. The below may help with this.
To start go here: Match his settings:
Fallout 4 Let's Play Prologue 2: Performance and Optimization
make sure to watch it at 15:33 but I recommend you watch it all.
Then here:
https://www.nexusmods.com/fallout4/mods/23556
And follow the instructions here and download his profile:
It may help but..... that is where the reading comes to play. There isn't a simple answer to stuttering there are a lot of causes and a lot of possible solutions.
This article explains one possibility: The most likely!
https://www.simsettlements.com/site/index.php?threads/scrapping-mods-and-performance-issues.6992/
Same here:
https://simsettlements.com/web/wiki/index.php?title=Performance
INI settings
The below can help if you're experiencing frequent crashes and have a fairly large mod load as too many scripts running simultaneously can cause a crash.
In your Documents/My Games/Fallout4/ directory, you should find a file called Fallout4Custom.ini. If you do not, open
Notepad and save a new file in that folder with that exact name. Open the file, and look for a section titled [Papyrus]. If you do not have this section, go to the bottom of the file and add it as a new line. Just below the [Papryus] heading, add the following lines:
[Papyrus]
fUpdateBudgetMS=2.4
fExtraTaskletBudgetMS=2.4
iMinMemoryPageSize=256
iMaxMemoryPageSize=1024
iMaxAllocatedMemoryBytes=307200
Note: If any of those items already existed in your file, you'll want to update the numbers to match the above instead of adding extra copies of those same items.
The above settings double the amount of memory and time allotted for scripts to run in your game. If you find that these numbers make your situation worse, you can delete the lines or reduce the numbers to something slightly less than double and try again.