I have an issue that began to crop up a few days ago following completing the main storyline of the Dragonborn DLC. What happens is that whenever I try to sneak, I get a frame rate spike, and any time I perform a silent roll, the very end of the roll where the user is recovering (camera bobbing up slightly) has a significant drop in frame rate.

My rig is very powerful. Up until this point I've been playing on all maximum graphics with 60 mods and can easily have as much as 50 actors on screen with no drop in frame rate.

Now I can drop the game to its lowest possible settings, disable all my mods, and it still occurs. Granted, the effect is reduced, but it shouldn't be happening at all.

Things I've tried:

-Update drivers

-Fiddle with settings (min to max)

-Leave Solstheim

-Disable/enable mods

-Launch game differently (with Nexus Mod Manager, without, with script extender, etc)

There has been lag in Solstheim before (minor. Not sure why.), but this lag is crippling, especially as a stealth character who is using sneak a lot. I first noticed it as being far worse than expected when I entered Benkongerike to get my third Black Book after completing the main story. Ever since, the lag has been brutal.

Just before I did that, I did a bunch of crafting, which included re-allocating perks with Waking Dreams, and much of the crafting was related to mod content, but, once again, I tried the game with the mods disabled, and the issue persisted.

Have you checked the load order of your mods (if enabled) with BOSS ???

Have you Verified the Integrity of your Game Cache files ???

Yes and yes.

I thing it's not a performance issue, it's just a strange optimization issue. !!!!

btw i don't even know what graphic card you have ???

You can give this a try:

"Simply open the tool and select TESV.exe in your Skyrim folder (Steam\steamapps\common\skyrim), tick Large Address Aware Flag and then click Save.

As a final tweak, I recommend you edit Skyrim.ini (found in Documents\My Games\Skyrim) to add the following under [Papyrus]:
iMinMemoryPageSize=100000
iMaxMemoryPageSize=5000000
iMaxAllocatedMemoryBytes=1800000000"

That's totally worth a shot. Just copy that .ini file somewhere before you do it, so if it doesn't work you can just swap the original file back into the folder.

I'll try out changing those scripts when I get the chance, but my video card is an GeForce GTX 650 Ti.

I agree, though, I don't think it's performance-based. The game runs flawlessly when I'm not sneaking.

Don't touch those INI values.

Also, LAA is enabled by default as of 1.3.10. It will do nothing.

They are default settings and Min and Max settings as well.

I don't see any point why somebody can not alter some settings !!!! (not even try !!!!!)

As for the iMaxAllocatedMemoryBytes the numbers are within the limits...

(And yes i know about the stack buffer overflow problem)

iMinMemoryPageSize

This is the smallest amount of memory the VM will allocate for a single stack page, in bytes. Smaller values will waste less memory on small stacks, but larger values will reduce the number of allocations for stacks with many small frames (which improves performance).

Max: 2147483647

Default: 128

iMaxMemoryPageSize

This is the largest amount of memory the VM will allocate for a single stack page, in bytes. Smaller values may force the VM to allocate more pages for large stack frames. Larger values may cause the memory allocator to allocate differently, (decreasing performance for large stack frames).

Max: 2147483647

Default: 512

iMaxAllocatedMemoryBytes

This is the maximum amount of memory the VM will allocate in total for stack frames. If an allocation would push memory usage over this limit, the VM will instead wait for more memory to be freed. Increasing this value may improve performance in high-stress situations with lots of scripts running, but will use more memory. Note that it is possible to exceed this value temporarily while loading a save game due to slightly different allocation ordering.

Max: 2147483647 (2GB)

Default: 76800 (75kB)

Beside that i have sources from people that have done this and have performance gain with stuttering problems.

But again if that not work you can always go back, to the default settings...so i don't see any problem here.

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As for the Large Address Aware Flag i know that, but i don't know if the OP has it already installed or not.

(i mean the unofficial patches, because many people haven't)

Don't mess with the Papyrus memory values. At all.

If he has the game up to date, LAA is enabled.