Of course, the glue code also has runtime costs. JavaScript objects must be allocated and garbage collected, strings must be re-encoded, structs must be deserialized. Some of this cost is inherent to any bindings system, but much of it is not. This is a pervasive cost that you pay at the boundary between JavaScript and WebAssembly, even when the calls themselves are fast.
Highest danger rate
，这一点在WPS下载最新地址中也有详细论述
Allow WebAssembly code to directly call Web APIs.
If true, the practice of knocking on wood for good luck is actually surprisingly new.