Using const/let instead of var can make JavaScript code run 10× slower in Webkit

Re:Using const/let instead of var can make JavaScript code r... by jpcooper on Wednesday October 21, 2020 @04:52AM (#24845973)

There are two possibilities in C++. I am not sure what the situation is in Java.

It is possible to define a pointer to an object whose contents may not be changed. This is done with ‘const * type object’.

If you want a pointer whose value must not change, but do not care about the contents of the pointed to object, you would write ‘type * const object’.

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Re:Using const/let instead of var can make JavaScript code r... by eMSF on Wednesday October 21, 2020 @05:52AM (#24846224)

You ought to have mentioned that pointers of the latter type are quite rare in C. A mention of const pointer practically always means a pointer-to-const: a pointer you can't write through. Often you can still "re-bind" such pointer to another object – in both ways the polar opposite of JS const.

Of course, in C++ there are const references as well, and in this case const also means you can't modify the referenced object (in any case in C++ you can never re-bind a reference).

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