About the ini tweaks:

I just tested it again using newly generated ini files without any modifications.
Same as before. Ralof/Imperial script won't trigger with AL but works without.

Same here. Oh, well. Hope this will be fixed.

Seems like we stumbled upon the reason why bethesda didn't use the discussed compiler flags after all. To me this looks a little bit like they throttled some threads at will in order for the AI timing to work correctly.

Nevertheless i do hope that i am very wrong and this is some other kind of side effect that can be easily overcome. Would be a shame considering the performance hit.

Edit: Maybe thats also the reason it happens for some and doesn't for others, different cpu speeds yet different timing

OK for those getting the delays and problems only with the plugin try using ENB Antifreeze Patch 9 (http://www.enbdev.com/doc_en.htm), FPS Limiter (http://www.skyrimnexus.com/downloads/file.php?id=34), OR Dxtory (http://dxtory.com/v2-download-en.html) to limit your FPS to around 30. I don't expect you to play forever this way, but I'm curious what the results will be.

I registered to say that the dude who made this is a scholar and a gentleman, I seriously hope Bethesda is considering hiring him. Went from 45 to 60 FPS.

Hmmm appears to make no difference in frame rates for me. Oh well.

Also SKSE increases my load times by around 30 seconds. But as I use no plugins I can simply remove this for now.

This mod bumped my performance up hugely, it's turned the game into a pleasure to play rather than a "why the hell am i only getting 30fps in this city" rage fit, im not sure if it's related to this mod either but i ran a vanilla skyrim installed until i added skse and this mod, now when i kill certain bandit in a certain cave, the game doesn't freeze anymore, when it did before, so either skse fixed that freeze issue or this mod did.

Not sure of how much it's bumped my fps by either but it's definitely increased, i had slowdowns every so often especially in towns, now im not getting any at all, running 2500k at 4.2ghz., if bethesda doesn't implement these optimisations in the next patch then i've lost faith in them entirely, there's really no excuse for such sloppy work.

I just had to register to say that I experienced the Helgen bug when I installed the game for the first game on the launch day, naturally playing with no modifications whatsoever. At first I was somewhat perplexed on seemingly lackluster scripting, but shrugged and continued playing. In the end, the game progressed and I got out. I'm not saying the bug is not connected to TESVAL since it might increase the chance of bug occurring, for example.

Nevertheless, excellent work with the modification! Looking down the stairs in Dragonreach, my FPS went from 22-24 to 30-23. I'm on Core2Duo E6550 @ 2,8 Ghz OC + GTX 560 @ 950 Mhz.

In my opinion this is great mod just like @mindflux wrote scripts sometimes don't fire it's very uncommon but it happens in my 100+ hours of playtime i did have this 2 times on patch 1.1 and 1.3.'

Im using this mod and not going to remove it it gives a lot more benefits than one stupid bug with nord not following you in begining preaty sure it's not this plugin fault.

But maybe in skyrim this plugin just increases chance for this bug to happen...

Not just this script, it may stop radiant story scripts from working and who knows what else. And in the end it may just kill all your saves.

Arguably, that's true of ANY mod. No modification is 100% safe, and Bethesda proved their own patches aren't even 100% safe with Patch 1.2 breaking a lot of stuff.

We have tons of people trying this mod out with no issues whatsoever, and most of those that do have the Helgen bug don't have further script / AI issues so far.

We need more people testing it out and giving us data.

This is why i made backup any way so far everything works like a charm i woulden't even know even about bug in helgen.

Still this did reminde me about Oblivion mod that was optimising scripts people reported simlar issues but i was using it any way and i diden't encountered any mayor problems but fps ggain was very small.

Google " OblivionScriptOptimization " still those are 2 completly difreant mods but people claim this mod is ruining scripts if that would be true every script would be buggy not just 2 imperials at helgen...

Edit: Any way for more info im playing at Acer Aspire 7551g AMD Phenom II X4 2.2Ghz AMD Radeon 6650m 1gb 4 GB DDR3 1066 HD 500 GB 5200 rpm and Windows 7 x64.My Fps is betwean 20-55 in cities 20-30 only but still more playable than Oblivion so i can't complain 2 crashes so far only and people complain...

Ariasu again thank you and i hope there is room for more improvement.

Edit2: Can some Admin merge the 2 threads about same thing kinda anoying to read 2 threads...

Conjecture and drama is pointless. Stick to repeatable facts. As you can read in this thread, some script-fire issues have occurred without AL. The 1.3 update came out just the day before so it's easy to misinterpret whether issues are related to AL or the patch (or, for that matter, Skyrim in general -- someone else mentioned the Imperials not firing on a bare original Skyrim 1.0 install).

Kudos to Arisu though, this is a much needed peformance boost. Hopefully Bethesda can release the next patch with binaries that are optimised.


This is true and it's worth noting to avoid any confusion that the above is something completely different -- the above are optimised scripts in the sense of changing the script logic to execute efficiently. The AL patch has nothing to do with scripts. Further, back when Oblivion came out the engine with scripts was a little more demanding on CPUs of that generation. On today's processors script processing is far less demanding (if memory serves there was a test on Fallout 3 that showed it took thousands of updates a second to cause a single FPS loss. No amount of vanilla scripts plus all the mods you'd likely want to run could approach this).

I loved perfomance improvement as well (heck, who doesn't?), but imo so far it's too risky to play with it. Can't wait when the issue will be fixed.

Btw the mod is on steam news!

Yes true but betatesters are needed just backup your save folder still considering bethesda i remember removing lots of mods from Oblivion,Fallout games and they would still load fine so i doubt if this plugin can screaw something up just remember to save often if you encounter similar bug like in helgen that will prevent you from moving forward still from what i read some people have those problems from begining so...

And im sure the mod improving AI that im using will screaw up my saves faster than this plugin


Maybe if you would test it you would notice it actually improves preformance by 5-10 fps and removes shutering still it's your choice to use it...

Gotta love these placebo mods.

Glad some people think it's working for them! lol >_<

If you mean the TESV Acceleration Layer, people are actually benchmarking their FPS and seeing quite notable improvements. Still, benchmarking won't work for everyone, since not everyone has a CPU bottleneck (meaning your FPS is limited by your CPU). The easiest way to test is to go up to a high location in a city like Markath or Whiterun (Dragonsreach) and look down on the city below. For most people this is a huge FPS hit and is CPU-limited, while not as much with this plugin.

Oblivion Script Optimization project was a poor example as that actually did cause problems and was mostly a placebo effect.

The two are VERY different.

You talk as if a computer program is magic. Stuff happens, but nobody knows why. We call holy incantations, and hope the magic works fine. And make sure we all stay humble, or the wrath of the gods may fall on us.

That's not how computer science works. You can make rational statements about it. The more tools you have to look at it, the more precise your statements can be. Of course people still make mistakes. But it's not like this is a black box where all we can do is pray.

The tool does 2 things. It removes unnecessary calls to getter functions. And in one spot it replaces some x86 machine instructions by SSE machine instructions. The chances of this messing up scripts are close to zero. The only thing I might be worried about is how these changes are packed in a mod. That is where 2 different mods might bite each other. But the changes themselves are well understood and are very low risk.

It is working. And you can test it yourself very easily.
And more importantly, the author has explained what he has done. And anyone with half a brain and a little bit knowledge of programming can understand why this works. There is no "believing or not believing".

You are the one who is injecting FUD into a clear issue.

Well for my unit and for my unit in the front room it does nothing. Two very different machines. E8400 @3.1 with an 8800GT sli set up, and a 2600k@4.8 with a 580. E8400(20-30 fps, no change in any city) 2600K(60 fps solid, vsync off 65-85, no increase either)

There is no FUD, just a placebo. I'm just waiting to see what this injects that truly screws over all these people. Beth does things for a reason, they know this crappy engine better than anyone modding it. Mods like this in the past have done crazy things to the game as well, then people just blame it on the engine and "beth's bad coding" even though they have 15+ mods installed.

It's no "placebo". I'll direct you to a post I made in the original thread. Same save, same PC, same settings. I just logged in without moving the camera at all so the view is the same in each shot. If you want to be a skeptic thats your prerogative, but when there are two threads in which posters overwhelming state similar results (many with benchmarks such as mine) its your loss if you ignore them.

http://www.gamesas.com/topic/1321657-tesv-acceleration-layer-offers-cpu-optimization-massive-possible-performance-increases-now-in-skse-plugin-format/page__view__findpost__p__19872945

if you see no impact from it, I would suggest that there is a very good chance that you have merely failed to install it correctly with the SKSE. The instructions for downloading and installing it have been changing, and it is worth double checking, that you have the very latest files uploaded to Skyrim Nexus.

It just might be worth your effort to give it another try.

For your satisfaction, however, it does seem that there may be some issues with certain scripts, especially in the game introduction in Helgen. One possible cause could be that the scripts improperly rely on code execution times, and get de-synched when parts of the code work faster. Still, that is no excuse for you not to try to see how well TESVAL achieves its intention. And at least then you would have actual experience about it.

I've already gone through the steps listed on the other thread. Same impact each time after verifying, admin, etc...

There's nothing to be gained from this, only extra risk for corrupted saves the next patch Beth releases, and god only knows what this code is affecting in the game world.





I saw your post, I've also been scratching my head as to why your SS's look like garbage. How is that even possibly on Ultra?

My case

Windows7 Ultimate 64
i7 2600k
2gtx580 / SLI
P8P67EVO B3 Motherboard
16gb RAM CORSAIR
Playing at 1080p



BEFORE (NO ini tweaks and NO MODS)


Last nvidia beta (drivers 285.79) and YES i used driversweeper.
No crashes ever, played 90 hours total so far. Longest stretch 4 hours.
No missing textures ever.
No performance issues with any other game (All 50+ fps even Crysis2 dx11 + texture patch) and/or benchmarks ( 3D MARK11 , 3D MARK VANTAGE and HEAVENS ) all results seem normal.
I use Kaperskypure Pure(Antivirus) and CCleaner for computer maintenance I also defrag my HDD every month.
And yes I tried to turn them off while playing.
No difference between using 2gb/4gb skyrim.exe


Whiterun Stairs 20-22 fps
outdoors 13-50 fps ( Average 26 -23 or less)
50-60+ fps indoors
Plus stuttering





AFTER NVIDIA 290.53 DRIVERS and TESV Acceleration Layer (PLUS ini tweaks and TEXTURE MODS)

Whiterun Stairs 38-42 fps
outdoors 50-60 fps ( Average 60 or more )
60+ fps indoors
No problems for the moment



Program/tweak ----------- increase in performance

NVIDIA290.53 driver ---------40%
TESV Acceleration Layer----50%(Most in cities)



THX nvidia,Arsisu and ianpatt

If I was as quick to believe as you that two samples are sufficient to give an absolute answer, I would be inclined to believe that you simply failed to install this correctly on both systems.

Here's how I concluded that this is doing something:
run #1, no extender, walked up to Dragonsreach and looked at the city: 26-28 FPS (as measured by Fraps)
run #2, loaded save from run #1: 27-28 FPS
run #3, loaded save from run #2: 27-28 FPS
run #4, loaded save from run #2, with SKSE but not the TESVAL mod: 27-28 FPS
run #5, loaded save from run #2, with SKSE after adding the TESVAL mod: 33-34 FPS
run #6, loaded save from run #2, still using mod: 33-34 FPS
run #7, same as above: 33-34 FPS
run #8, started without SKSE loader: 27-28 FPS

Conclusions: Correlation between improved framerate and presence of TESV Acceleration Layer.