c++ - Is there a performance penalty for passing "this" by value in Go methods?

Question

I'm exploring Go after 9 years of C++ development. In C++ it is a bad practice to pass function's arguments by value except variables of built-in types because of performance penalty: all fields of the argument will be copied and in most cases it will be a very costly operation.

Is this true for Go? It looks very expensive to pass "this" by value only to assign "const" semantic to the method. Is Go compiler smart enough to prevent variable from being copied before first modification? Why isn't passing "this" by value an anti-pattern in Go as it is in C/C++?

Answer 1

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