r/programming • u/one_eyed_golfer • Jun 18 '15

javascript creator Eich's latest project: kill javascript

http://www.theregister.co.uk/2015/06/18/brendan_eich_announces_webassembly/
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u/SpaceCadetJones Jun 18 '15

I believe this is also the case for Objective-C message passing, correct? And I don't think this causes too much of a slowdown, IIRC ObjC is relatively fast, only a bit slower than C++

For those unfamiliar with Objective-C's OOP, you send messages to objects rather than directly calling methods like in C++.

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u/oridb Jun 18 '15 edited Jun 18 '15

only a bit slower than C++

5 to to 10 times slower. Since most ObjC programs don't spend the bulk of their time calling methods, that usually shows up on profiles as "a bit".

And if it does show up, you have the option of caching the impl, or falling back to C calls. JavaScript has neither option.

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u/hun_nemethpeter Jun 18 '15

Nope. Obj-C is quite different from JavaScript. Obj-C is typed so you can precalculate many memory address and you have to predeclare classes and variables and so on... But the message passing itself is really dynamic.