Spring RTS Engine

Okay problem solved I think. The MT version will currently only give lower CPU load if you avoid any CPU-hungry widgets. Why? They interfere with the Sim execution slowing things down. Typical problem widgets are those that draw many things on the screen.

Particularly you should avoid these:
BuildBar
HealthBars
Take Reminder
XRayHighlight
TeamPlatter
XRayShader

You can test yourself, disable widgets until the luaMutex profile drops to way below 1%.

As you already know, for compatibility reasons you should not use these either:
FPSManager
LolUI
Lups
LupsManager

And you can get better performance if you define NDEBUG during build.

And any widget that extracts resource data from players causes GML error spam.

No, any widget that tries to use OpenGL in simulation thread causes GML error spam.

zerver, I'll try disabling some of those Widgets later. Some of them kinda sound important, but I guess if they give me better performance I'll learn to live without them.

Thanks for the help!

Sure, btw I use only these widgets:
AutoQuit
ImmobileBuilders
MetalMakers

Alright, I disabled the widgets that were causing the CPU load, and recompiled it with all debugging disabled. All I have to say is it's in running much smoother now. I had 1100 jets area attacking the ground, and the CPU load never went above 60%, hanging around 30-40%. The frame rate however was a little low, but nothing compared to a 100% loaded CPU.

So thanks again, zerver, for all your help! And if I get anymore hangs or crashes I'll make sure to post back here.