Extreme lag with radially attached boosters

[PDCWolf]

Well, the problem is pretty simple to explain: Whenever I attach a solid booster or liquid booster, even the simplest (nose cone, tank, engine) , the game lags to hell and back. When I press launch, the game works at normal FPS until after KJR starts doing its magic. After physics are fully initialized my game drops to 10 fps. Once I jettison the boosters, FPS automatically jump back to 30. When they crash/disappear I get another FPS boost which takes me back to the normal 40/50.
 

• Happens with anything radially attached and exposed to the airstream (not with things radially attached but kept inside a fairing).
• Happens when the parts are attached either to procedurally generated parts, stock parts or mod parts.
• Happens at all symmetry levels, even x1.
• Happens with any radial decoupler
• Happens even If I'm not using decouplers (i.e. non detachable boosters)

I don't know how long this could've been happening so I can't track exactly which mod caused it. I normally build mono-column rockets without boosters.

Mods I'm using:

LOG: https://www.dropbox.com/home/Public?preview=output_log.txt

Edited March 12, 2016 by PDCWolf

[PDCWolf]

Been investigating for the last couple hours, still no clue. However I edited the OP with additional and corrected information. Seems to be related specifically to radially attached parts exposed to the airstream. Radially attached parts inside a fairing have no problem whatsoever.

[JTpopcorn]

It could be the extra physics load on teh cpu, but those numbers seem extreme for that to be the problem...

The fact that it jumps back up makes me think it is a cpu overload when handling FAR physics.

[PDCWolf]

38 minutes ago, JTpopcorn said:

It could be the extra physics load on teh cpu, but those numbers seem extreme for that to be the problem...

The fact that it jumps back up makes me think it is a cpu overload when handling FAR physics.

I've been further investigating since I made the last correction to the description, this is what I got now:

The problem not only solves by jettisoning the boosters, it also goes back to normal after jettisoning the fairings. So I suspect that it is some kind of procedural fairings/FAR interaction causing the problems. I'll be back in a second with some pictures to illustrate.

[JTpopcorn]

Try testing wtihout one or both of the mods, if you could replace the fairing with an similiar mass tank and nosecone, you would be able to compare fps on nearly the same craft.

[PDCWolf]

 

That should clear up any confusion. Maybe.

 

[JTpopcorn]

Well you found the problem, but I have no idead how to fix it....

[PDCWolf]

So, I removed FAR. Problem is still there. That makes me point to proc fairings, although they work fine on other rockets. ¿Payload with too much parts? ¿Too complex? Happens if I remove the inner fairings too, so nested fairings is not the problem.

[JTpopcorn]

Maybe try redoing the fairing/reinstalling procedural fairings

[EVA_Reentry]

@PDCWolf, that's quite a spike in the fps

 

[arn]

I've just started experiencing this same issue and I can't find anything online about it anywhere else. Did you ever figure anything out? I'm running a very lightly modded installation. System is a Dell laptop i9, 32gb RAM, rtx 4070,SSD. I've never had the game lag like this before even on less specced machines.

[Cleric2145]

Weirdly enough, I have too. I'm not sure why this is suddenly a problem after 8 years, but judging by the complete lack of google results on this (barring this thread) it has to be something fairly new? It seems to be worse with procedural parts.

It's taking me 5 minutes or more to load to the launchpad, only to get one frame of the rocket on the pad that freezes indefinitely. If I strip down the lateral boosters to just the tank and engines, I can manage 10-20 fps with 2 second stutters every 2-3 seconds. Non-procedural boosters with nothing attached seem to be better, but still dump my frames to the 10s-20s (albeit without the stuttering).

[Shocker]

On 4/15/2024 at 10:38 PM, arn said:

I've just started experiencing this same issue and I can't find anything online about it anywhere else. Did you ever figure anything out? I'm running a very lightly modded installation. System is a Dell laptop i9, 32gb RAM, rtx 4070,SSD. I've never had the game lag like this before even on less specced machines.

 

On 5/17/2024 at 2:01 PM, Cleric2145 said:

Weirdly enough, I have too. I'm not sure why this is suddenly a problem after 8 years, but judging by the complete lack of google results on this (barring this thread) it has to be something fairly new? It seems to be worse with procedural parts.

It's taking me 5 minutes or more to load to the launchpad, only to get one frame of the rocket on the pad that freezes indefinitely. If I strip down the lateral boosters to just the tank and engines, I can manage 10-20 fps with 2 second stutters every 2-3 seconds. Non-procedural boosters with nothing attached seem to be better, but still dump my frames to the 10s-20s (albeit without the stuttering).

I have been having this very problem for the past few months. It's something with the boosters for sure and is only a major issue at launch till I drop the boosters. I just have no clue how to narrow down the issue for a fix.  I really wish someone smart could give an answer. 

[Cleric2145]

My best assumption would be that it has something to do with either FAR, Waterfall/plumes, Autostruts, or maybe something like ship manifest? Perhaps procedural parts? It seems to get exponentially worse with each radially attached part on the boosters. Four SRBS with no parts? Slightly laggy on higher-part crafts. Liquid boosters with multiple tanks, stabilizers, separatrons, and chutes? Unplayably laggy, even on relatively low-part rockets. It strangely doesn't seem to mind radial parts unless they are specifically on a booster, as all my planes with 20 radial parts seem fine, and anything radially attached to the rocket not on a booster unit don't seem to trigger it.

[PDCWolf]

Hello, I'm the original creator of this topic. I do not remember -at all- how I got it fixed last time, but it did involve something with the mixing of KJR and Proc Fairings.