You might try defragging your game cache using Steam's option.
Code:
Right click on Killing Floor in your My Games tab.
Select Properties
Select Local Files
Left click on Defragment Game Cache
See if that helps. If you haven't in a while, I'd try defragging your Hard Drive, too.
My machine was experiencing longer than usual map load times and periodic "lag" spells in certain maps immediately after the update. I run Diskeepers automatic defrag program, but I went ahead and did what I suggested above AND manually defragged my HD. I also "re-introduced" my anti-virus/firewall program to KillingFloor.exe. Things cleared up dramatically.
If that doesn't work, I know there used to be topic in the Red Orchestra forums about speeding up map load times and clearing up stutters. Perhaps some of those tweaks would help?
From:
[URL="http://forums.tripwireinteractive.com/showthread.php?t=7282"][URL="http://forums.tripwireinteractive.com/showthread.php?t=7282"][URL]http://forums.tripwireinteractive.com/showthread.php?t=7282[/URL][/URL][/URL]
Error: Red Orchestra takes a long time loading maps
We are looking into the over all cause of this however you may do the following to attempt to improve your load times.
Fix1:
1) Find your Redorchestra.ini file located in the steam/steamapps/yournamehere/redorchestra/system folder (hint it looks like a notpad icon with a cog)
2) Change the cache size to better match your ram size
Listed under [Engine.GameEngine].
256 Megabytes of RAM or less
CacheSizeMegs=32
512 Megabytes of RAM
CacheSizeMegs=64
768 Megabytes of RAM
CacheSizeMegs=128
1 Gigabyte of RAM or more
CacheSizeMegs=256
Fix2: Turn of PreCaching
Also in your redorchestra.ini under [ALAudio.ALAudioSubsystem]
Change UsePrecache=True to UsePrecache=False
and under [Engine.LevelInfo]
Change bNeverPrecache=false to bNeverPrecache=true
and under [Engine.NullRenderDevice]
Change UsePrecaching=True to UsePrecaching=False
and under [D3DDrv.D3DRenderDevice]
Change UsePrecaching=True to UsePrecaching=False
and under [D3D9Drv.D3D9RenderDevice]
Change UsePrecaching=True to UsePrecaching=False
and under [OpenGLDrv.OpenGLRenderDevice]
Change UsePrecaching=True to UsePrecaching=False
and under [PixoDrv.PixoRenderDevice]
Change UsePrecaching=True to UsePrecaching=False
If your machine is marginal,
Fix 2 may be a big help.
Just some thoughts. Don't know if the tweaks apply to KF, but if all else fails thay may be worth a try.
Good luck.