Article is unrelated. The overhead for Wasm is from copying structs into and out of the Wasm's linear memory. Wasm only has ints and floats at the boundary, so

Article is unrelated. The overhead for Wasm is from copying structs into and out of the Wasm's linear memory. Wasm only has ints and floats at the boundary, so you have to copy everything into structures it can understand. Note that there is work to improve this (interface types, anyref, etc), but we're not there yet.