FYI, test world (FTB copy from last night) with lots of TNT. Something in the area of thousands but I laid them by hand and then set them off.
Here is a video where I also put the server "top" and Process Manager for the PC in the background. Go fullscreen to see the details, I did record/upload in 1080p.
Short version, load went up as high as .58 but then dropped quickly after. This is the with VM set to 4GB of RAM and 1 core, two threads. Still on HDD too so the chunks didn't load really fast. If you guys want to get on there and just play, I'll set you to creative mode so you can have a blast putting it through some paces. Let me know.
Edit:
did an even larger load of TNT
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