Why do Rotondo's V8 zombie Bot Holes lag more than normal bots?

[Lego lad]

so I downloaded rotondo's V8 zombie bot holes (the ones that destroy bricks) and I noticed that at around 30 bots I lose a lot of FPS, then I cleared the bots and placed 30 NORMAL bot holes, and I didn't lose nearly as many FPS. Why are they different?

link to rot's V8 zombies:
http://forum.blockland.us/index.php?topic=239523.0

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[The Resonte!]

maybe they're not optimized or are more complex

but this is just a guess

[Lego lad]

maybe their bot holes are being ddosd

[phflack]

I'm guessing it's from checking an area around them every so often to try and break it