How JavaScript engines achieve great performance

Re:How JavaScript engines achieve great performance by masak on Thursday November 25, 2021 @10:10PM (#29347191)

Neither the type system of C++ nor the type system of TS is sound, in the sense of "the type system rejects all incorrect programs".

If what you meant by "strong" is just "you can declare types on variables", then both TS and C++ qualify as strong, but JS doesn't.

Your use of the word is based on feeling, not fact. Which was my point.

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Re:How JavaScript engines achieve great performance by FpUser on Thursday November 25, 2021 @11:56PM (#29347583)

Typescript compiles down to Javascript. And this is the problem. When I say uint16_t in C++ I know how it will be kept in RAM and what I can do with it, how I can pack things together etc. etc. TS lacks this abilities. You can play with terminology all you want but it does not change simple facts.

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Re:How JavaScript engines achieve great performance by kaba0 on Friday November 26, 2021 @04:53AM (#29348825)

You could (probably can) compile C++ to JS. What will that be? In the end, code is just data operating on data with no semantics. Your uint16_t is only meaningful to the compiler, the same way as TypeScript types are (with a few caveat).

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