FPS went from 60 Yesterday to 20 Today

[draginz]

Hello fellows. Today I started up Factorio and to my dissatisfaction I found that it was running at roughly 15-25 frames per second. This was quite the surprise to me, because just yesterday (and every other time I've played) my game has run at a smooth 55-60 FPS. I'm really not sure what's happened here, I'm hoping some bright mind can help me out.
Some pertinent info:
- I am running vanilla.
- My save file is about 60 hours in, however, I started up a brand new freeplay game, and the FPS issue remained.
- My UPS remains at 60.
- My system is not in power-saver mode.
- My CPU averages at about 35 - 45 degrees C while running Factorio

System info:
Core i7 5500U Broadwell
12GB RAM
nVidia GTX860m 2GB GPU

Ingame screenshot with F5 menu:

20170528234029_1.jpg (591 KiB) Viewed 766 times

Thanks!

[posila]

Does it persist if you reboot your computer? Please post also your log (located at %APPDATA%\Factorio\factorio-current.log)

[draginz]

Does it persist if you reboot your computer? Please post also your log (located at %APPDATA%\Factorio\factorio-current.log)

Hello posila.
Yes, unfortunately the issue does persist after a couple reboots.
Here is my logfile:

Code: Select all

0.035 2017-05-29 00:53:19; Factorio 0.15.6 (build 29362, win64, steam)
   0.035 Operating system: Windows 8.1 
   0.035 Program arguments: "C:\Program Files (x86)\Steam\steamapps\common\Factorio\bin\x64\Factorio.exe" 
   0.035 Read data path: C:/Program Files (x86)/Steam/steamapps/common/Factorio/data
   0.035 Write data path: C:/Users/Spathi/AppData/Roaming/Factorio
   0.035 Binaries path: C:/Program Files (x86)/Steam/steamapps/common/Factorio/bin
   0.052 System info: [CPU: Intel(R) Core(TM) i7-5500U CPU @ 2.40GHz, 4 cores, RAM: 12210MB]
   0.052 Display options: [FullScreen: 1] [VSync: 1] [UIScale: 125.405%] [MultiSampling: OFF] [Screen: 255]
   0.053 Available display adapters: 1
   0.053  [0]: \\.\DISPLAY1 - Intel(R) HD Graphics 5500 {0x05, [0,0], 1600x900, 32bit, 60Hz}
   0.053 Create display on adapter 0. Size 1280x720 at position [150, 72].
   0.632 Initialised Direct3D:[0] NVIDIA GeForce 840M; driver: nvd3dumx.dll 21.21.13.7682
   0.634     Video memory size (dedicated video/dedicated system/shared system/available): 1973/0/6105/4090 MB
   0.669 DSound: Starting _dsound_update thread
   0.669 DSound: Enter _dsound_update; tid=4876
   0.670 Device reset internal.
   0.673 Desktop composition is active.
   0.673 WARNING: You have vsync and desktop composition enabled on Direct3d. Consider disabling vsync to increase performance on some confirgurations.
   0.673 Graphics settings preset: very-high
   0.673 Graphics options: [Graphics quality: normal] [Video memory usage: all] [Light scale: 100%] [DXT: false]
   0.813 Loading mod core 0.0.0 (data.lua)
   1.617 Loading mod base 0.15.6 (data.lua)
   2.544 Loading mod base 0.15.6 (data-updates.lua)
   2.666 Checksum for core: 3409166051
   2.666 Checksum of base: 2213884006
   2.918 Info PlayerData.cpp:55: Local player-data.json available, timestamp 1496040033
   2.919 Info PlayerData.cpp:60: Cloud player-data.json available, timestamp 1495526686
   3.050 Loaded shader file C:/Program Files (x86)/Steam/steamapps/common/Factorio/data/core/graphics/shaders/game.cso
   3.053 Loaded shader file C:/Program Files (x86)/Steam/steamapps/common/Factorio/data/core/graphics/shaders/zoom-to-world.cso
   3.068 Initial atlas bitmap size is 16384
   3.076 Created atlas bitmap 16384x10866
   4.386 Created atlas bitmap 4096x1860
   4.396 Created atlas bitmap 4096x3648
  42.533 Sprites loaded
  42.533 Convert atlas 4096x1860 to: trilinear-filtering 
  42.718 Convert atlas 4096x3648 to: mipmap 
  44.753 Loading sounds...
  59.848 Custom inputs active: 0
  60.410 Factorio initialised
  60.430 Game is running on selected version branch on Steam.
  72.251 Loading map C:\Users\Spathi\AppData\Roaming\Factorio\saves\2017 sandbox - Copy.zip: 10724515 bytes.
  73.039 Loading Level.dat: 24801068 bytes.
  73.063 Info Scenario.cpp:133: Map version 0.15.6-0
  77.316 Loading script.dat: 190 bytes.
  77.414 Checksum for script C:/Users/Spathi/AppData/Roaming/Factorio/temp/currently-playing/control.lua: 76911248
  94.018 DSound: Stopping voice
  94.018 DSound: Joining thread
  94.022 DSound: Exit _dsound_update; tid=4876
  94.022 DSound: Waiting for voice to stop ... signaled
  94.022 DSound: Joined thread
  94.022 DSound: Destroying thread
  94.022 DSound: Thread destroyed
  94.022 DSound: Releasing buffer
  94.034 DSound: Voice stopped
  94.034 DSound: Deallocating voice
  94.034 DSound: Deallocated voice
  94.144 Steam API shutdown.
  94.146 Goodbye

Something I feel I should add: My laptop has two GPUs. One of them is a generic Intel HD something or other. The other one is a nVidia GTX860m 2GB. In my nVidia control panel, I have verified that the executable is using the nVidia GPU and not the generic Intel GPU.