Heavy mouse lag (specially on VAB) after a while playing

[Broax]

Hi everyone. This is a bit strange to explain but I'll do my best...

KSP: 1.0.4 Windows 64bit (I know but bare with me)

Problem: The game works fine for a while. For the first hour or so I only notice the usual problems of the 64bit build (building randomly showing as fully upgraded for example). After a while the game becomes very laggy. Everything works fine, the frame rates are stable but the thing is that whenever I try to click something (with the mouse, obviously) the click doesn't register. I have to hold the left mouse button down for like 0,50 seconds. After a while I have to press for maybe one second. And the time keeps growing. Everything still works OK but the mouse clicks seem to take longer and longer to register. After a while the game is barely unplayable and since loading takes so long (around 5min on a SSD) I just don't bother.

Mods installed:

1. OuterPlanetsModContractConfigurator-KerbinSpaceStation
   
2. StationPartsExpansion
   
3. StationScience
   
4. StockClamshellFairings
   
5. TacFuelBalancer
   
6. TACLS
   
7. TACLS-Config-Stock
   
8. TextureReplacer
   
9. Trajectories
   
10. TransferWindowPlanner
    
11. TurboNisuReloaded
    
12. WaterSounds
    
13. CommunityTechTree
    
14. NearFuturePropulsion
    
15. NearFutureElectrical
    
16. NearFutureSolar
    
17. NearFutureConstruction
    
18. NearFutureSpacecraft
    
19. KSP-AVC
    
20. ModuleAnimateEmissive
    
21. NearFutureProps
    
22. CommunityResourcePack
    
23. NearFutureElectrical-Core
    
24. InterstellarFuelSwitch-Core
    
25. GCMonitor
    
26. KWRocketry
    
27. KWRocketry-CommunityFixes
    
28. KWRocketry-CommunityFixes-interstage
    
29. Kopernicus
    
30. DistantObject
    
31. VesselView
    
32. CrowdSourcedFlags
    
33. Toolbar
    
34. TMSTACLSRetexture
    
35. EpicSuits
    
36. ContractConfigurator-RemoteTech
    
37. ContractConfigurator-RoverMissionsbyWhyren
    
38. RemoteTech
    
39. RemoteTech-ProbeControlEnabler
    
40. Thermometer
    
41. Muffler
    
42. PreciseNode
    
43. RoverWheelSounds
    
44. ChampagneBottleLafitte
    
45. ForScienceContinued
    
46. Scatterer
    
47. Telemachus
    
48. UniversalStorage
    
49. KerboKatzUtilities
    
50. NavUtilities
    

Reproduction steps: To reproduce the problem I only have to play for a while and it ALWAYS happens. It happens with everything I try to click but seems more noticeable on the VAB/SPH.

Log: The game doesn't crash so there's no crash log.

System specs: I don't know if this is helpful but since it's a lowend PC it might help, still...

• OS: Windows 10 Pro 64bit
  
• CPU: Intel Core2Quad Q6600 @ 2.4Ghz
  
• GPU: Gigabyte GeForce GTS450 (1Gb)
  
• MB: Gigabyte P35C-DS3R
  
• RAM: 8GB DDR2@400Mhz
  
• SSD: Kingston SV300 120GB (where KSP and Windows are installed)
  

Now, I know (a) Win64 isn't supported, ( too many mods CAN cause issues and © my PC is old and slow. Still, it shouldn't have these kind of issues. The game runs just fine for a long while until these things start happening and other games run just fine. The reason why I'm posting this is because I'm not sure if this is, in fact, related to me using the 64bit workaround. The game obviously crashes if I try to run the 32bit client so I can't test it with these many mods to compare and if I remove some of the mods the problem might be an undiagnosed mod issue.

Do other 64bit users have this problem? Does any 32bit user with mods installed have have these issues? Does someone with the linux 64bit version have this struggle?

The computer itself is well maintained. I recently did a fresh OS install (when I upgraded to Windows 10) and I make sure to keep everything running smoothly. Boot times are fast and all desktop applications run without any issues.

Any help is appreciated!

[dudefinal]

Whats going on in the debug log during this?

[Padishar]

I suspect this is caused by various issues that cause the memory usage of KSP to gradually (or not so gradually in some situations) climb. How much memory does KSP use when you first launch it and how much is it using when it starts getting slow?

As for logs, there is always an output_log.txt file created every time the game runs (well, it could crash before it starts writing the log but it's pretty unlikely). See the "How to get support" sticky thread for details of where to find it...

Edited September 9, 2015 by Padishar