Variable Access Speed in C++

[Vuhelper]

#
class MyClass
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{
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private:
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bool MyVar;
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public:
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MyClass &Function1(bool MyVar);
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MyClass &Function2(bool MyVar);
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MyClass &Function3(bool var);
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};
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MyClass &MyClass::Function1(bool MyVar)
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{
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this->MyVar=MyVar;
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cout<<MyVar;
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return *this;
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}
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MyClass &MyClass::Function2(bool MyVar)
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{
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this->MyVar=MyVar;
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cout<<this->MyVar;
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return *this;
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}
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MyClass &MyClass::Function3(bool var)
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{
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MyVar=var;
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cout<<MyVar;
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return *this;