This layered approach -- hardware for the fast path, microcode for the complex path -- is a recurring theme in the 386 design.
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。同城约会对此有专业解读
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.
have a heap allocation.