DwarfCorp runs, but performance is poor

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launches with fnaify 2.0-beta from 2019-09-19. In-game, the frame rate is poor, but better than it used to be. That's with SDL2 2.0.10, mojoshader 1214, on the AMD HD 7570 card.

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Controller 0: XBox360 Controller
IGLDevice: OpenGLDevice
OpenGL Device: AMD TURKS (DRM 2.50.0 / 6.6, LLVM 8.0.1)
OpenGL Driver: 3.1 Mesa 19.0.8
OpenGL Vendor: X.Org
MojoShader Profile: glsl120
EXT_swap_control_tear unsupported. Fall back to standard VSync.
Loaded settings {
  "TutorialDisabledGlobally": false,
  "ResolutionX": 1280,
  "ResolutionY": 960,
  "GuiScale": 1,
  "GuiAutoScale": true,
  "ChunkDrawDistance": 100.0,
  "VertexCullDistance": 1000.0,
  "AntiAliasing": 0,
  "Fullscreen": false,
  "EnableGlow": false,
  "DrawSkyReflected": false,
  "DrawChunksReflected": false,
  "DrawEntityReflected": false,
  "AmbientOcclusion": false,
  "CalculateRamps": true,
  "CameraScrollSpeed": 10.0,
  "CameraZoomSpeed": 0.5,
  "EnableEdgeScroll": false,
  "WorldScale": 4.0,
  "DisplayIntro": true,
  "MasterVolume": 1.0,
  "SoundEffectVolume": 1.0,
  "MusicVolume": 0.2,
  "CursorLightEnabled": false,
  "EntityLighting": false,
  "SelfIlluminationEnabled": false,
  "ParticlePhysics": false,
  "GrassMotes": false,
  "NumMotes": 512,
  "InvertZoom": false,
  "ChunkGenerateDistance": 80.0,
  "ChunkRebuildTime": 0.1,
  "ChunkUnloadDistance": 250.0,
  "DrawDebugData": false,
  "VisibilityUpdateTime": 0.05,
  "ChunkGenerateTime": 0.5,
  "FogofWar": true,
  "UseDynamicShadows": false,
  "UseLightmaps": false,
  "DrawPaths": false,
  "AutoSave": true,
  "AutoSaveTimeMinutes": 5.0,
  "SaveLocation": "",
  "VSync": false,
  "AllowReporting": true,
  "ZoomCameraTowardMouse": true,
  "CameraFollowSurface": false
} 
 /home/thfr/.local/share/DwarfCorp/settings.json

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quoting flibit: "I believe that game has excessive threaded GL in it"

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This is much improved and playable when I tried it with the latest Steam version, rather than the outdated one from humblebundle.