Awesome!I've tried a few things before, like changing iNum(HW)Threads values in the ini files. That actually did slightly increase my framerates in some cities with version 1.1 but doesn't seem to have an effect with versions 1.3.x any more.
This mod helps a lot in CPU limited areas. In the areas I tested before, it increases my framerates by at least 7 fps:
Steps of Dragonreach overlooking Whiterun: 20-22 -> 27-29
Dragonreach dungeon exit looking over the lavender plant toward the city center: 18 -> 25
In front of the player house door overlooking Markath: 18-19 -> 25-26
"Prison exit" left of the Markath palace, looking over the city: 20 -> 27-28
System specs:
AMD Phenom II X4 @3400MHz
8GB RAM
nVidia GTX 275 (1.7GB RAM, factory overclocked)
Windows 7 x64
Being a developer myself I will NOT blame Bethesda for not implementing this so far. Big projects are often bound to have problems with compiler optimizations. A mod like this also might work for many people but might cause problems for others. The authors can simply release it as it is, without guarantees. Bethesda can't do that, they have to be a lot more cautious and have to test changes like this thoroughly on a lot of different configurations. Still, I'd urge them to try and incorporate this into one of the next updates as not everyone might be comfortable with a mod like this.
I found no problems with this so far but I've only tested it a few minutes. I didn't experience any load time changes but small changes would be impossible to detect for me as I have both Windows and the game on an SSD.
I'm looking forward to test it more while playing the game as soon as I have time for that. (after x-mas

)
Thanks a lot to everyone involved in providing this, especially to Arisu!