Roblox SetStack

Roblox SetStack isn't exactly a household name if you're just someone who hops into Adopt Me or Blox Fruits for a few hours of fun after school. It's one of those terms that lives deep in the basement of the Roblox engine, specifically within the Luau virtual machine. If you've ever wondered how your code actually executes—how a script knows that local x = 5 means "put the number 5 into a specific memory slot"—you're already knocking on the door of what this concept is all about. ...

January 26, 2026 · 7 min · Estanislao Iklaas