Comment by azakai

Wait, what does this mean?

> We reuse WebAssembly linear memories under the covers to implement and sandbox the GC heap. A reference to a GC object is not a native pointer, it is a 32-bit index into the GC heap’s underlying linear memory [..] As far as being fast goes, it lets us use virtual-memory guard pages to elide explicit bounds checks, just like we do for linear memories

Array loads and stores still need an explicit bounds check, don't they? And struct loads and stores don't have one anyhow. Are there other bounds checks that Wasmtime is removing? I can't figure out what they mean here.