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I'm getting some heavy lag when flying over kerbin (or on the surface) sometimes. Still have not figured out any pattern. It does not happen as soon as I move above the ocean. Changing settings.cfg has not worked and neither has changing all my settings to minimum. I have 40 parts on the plane I'm trying to fly (so its not THAT big really).

I use Ferrum, B9 and KW.

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  • Are you only experiencing it when in the vicinity of KSC? Do you have something big on the launch pad or a landed aircraft nearby? Anything else within ~2.3km needs real time simulating, and since it's in the atmosphere, needs real time simulating via Ferram.
    – MBraedley
    Commented Jan 11, 2014 at 14:18
  • There is a slowdown in 0.23, people believe it has something to do with the water. Turning the physics-seconds-part in the settings to 0.10 might help.
    – Bobby
    Commented Jan 11, 2014 at 16:22
  • I deleted my config (after it all got messed up randomly) and now its gone (with default config). At least for the most part. I sincerely hope they focus on optimisation in the next patch. The game will be so much more fun with no lag.
    – Sellorio
    Commented Jan 12, 2014 at 22:01
  • I blame procedural terrain. Do you see more lag over more complicated terrain? Like, bearable over plains and problematic over mountains?
    – Mołot
    Commented Jan 13, 2014 at 11:34

2 Answers 2

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There's a bug/feature that causes excessive lag when you're close to the oceans. This is because the oceans are actually loaded as a separate planet entity. So the only way around this is when this bug is fixed, or you try running the game with a more powerfull computer.

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  • or running on linux :D
    – Sellorio
    Commented Jan 23, 2014 at 22:28
  • The 64 bit build is still quite buggy and I couldn't get it to work with my setup.
    – TeraTon
    Commented Jan 28, 2014 at 10:58
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I had the same symptoms myself, and I found that by placing the camera below the rocket, looking up from the terrain, would give me normal framerates. Having terrain in view would cause slowdowns.

I went with a "don't do that" solution. I also got a new computer since then which doesn't exhibit that behavior.

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