[pcwalton]

> Somehow I doubt that you jump on every thread about asm.js or Rust to point out how proprietary they are or how they are implemented as a giant pile of C++. Double standards.

asm.js isn't a new protocol, and so isn't proprietary according to that definition. It's a subset of JavaScript (to be specific, ES6, including such extensions such as Math.imul). You can implement asm.js by simply implementing the open, multi-vendor ES6 standard. In fact, that's exactly what some projects, like JavaScriptCore, are doing.

Rust isn't relevant, as it's not intended to be added to the Web. Adding <script type="text/rust"> to the browser would be a terrible idea for numerous reasons. Nobody has proposed it.

[tptacek]

Plenty of IETF standardization efforts can be described as "a subset of Javascript" or even just "a bunch of Javascript APIs". WebCrypto, for instance, fits that bill. What makes QUIC so different from WebCrypto?

[pcwalton]

QUIC and Web Crypto are both things that need to be standardized, so I don't know what the implication is or how to respond to that statement.

I do think there is a big difference between "a subset of JavaScript" and "a bunch of JavaScript APIs" from a standardization point of view. All engines have been implementing special optimizations for JavaScript subsets ever since the JS performance wars started. Nobody thinks we need to standardize polymorphic inline caches, for example, even though the set of JS code that is PIC-friendly is different from the set of JS code that is heavily polymorphic (and this distinction would be easy to describe formally if anyone cared to). asm.js is just an optimization writ large: the reason why it's not a protocol is that any conforming JavaScript implementation is also an asm.js implementation.

I think people are reading a lot more into my posts than was intended. I'm not calling out QUIC specifically, since I'm not involved with the details of its standardization anyway. The point is simply that open source doesn't automatically mean non-proprietary.

[tptacek]

Oh, sure. QUIC is a proprietary protocol. An IETF-standardized QUIC would not be.

[rakoo]

> Rust isn't relevant, as it's not intended to be added to the Web

"Proprietary" as used here isn't limited to the Web.

[pcwalton]

Point taken, and you're right that in a certain sense Rust is proprietary, with all of the very real downsides that that entails (for example, the risk of tight coupling of programs to rustc, as hard as we try to prevent it). But I still think it's a fairly irrelevant thing to bring up, because Rust isn't targeting a large, open, multi-vendor ecosystem (as I specified in my original post). If Rust catches on, no other vendor is going to be forced to implement anything; nobody outside the current Rust community is even asking for a seat at the design table. The only real downstream dependency that the success of Rust might impact is LLVM, and we actually have maintained a pretty good relationship with the LLVM community from the start.

[magicalist]

I think this is kind of doing disservice to the way innovation of the web has proceeded virtually everywhere. Over and over again this is how web functionality has jumped forward. And there's plenty of examples of this happening at Mozilla -- e.g. the WebAPIs, not all of which are limited to FirefoxOS, and of those that have been submitted as working drafts, many haven't been touched or discussed since submission. Which is fine. Often an email to a mailing list isn't enough and you have to just start doing something to get the other browsers to act, and sometimes a standard has to languish for a while until everyone figures out it's needed after all.

Things like the "Championed" proposals model for TC39 and (as DannyBee notes) IETF's approach to standardization are direct acknowledgements of this. In a way the Extensible Web approach is also a direct acknowledgment, insofar as it says that innovation happens at the edges, so browsers should provide minimum flexible building blocks and get out of the way. asm.js is a great example of using those building blocks (though it should be noted that as asm.js catches on, other browsers are forced to spend time on it, explicit directive prologue handling or no). Network protocols, on the other hand, are something that can't be built and tested from the tools browsers provide.

I think the better question for you would be, what's the better way to develop network protocols like this, then? Assuming that purpose, I can't think of anything to criticize here except maybe they should have limited testing to beta and dev users of Chrome. However, that limits your test data and normally that sort of thing is done to make sure web compatibility isn't broken in the future by changing standards, and given that browsers already negotiate protocols, I don't see an imminent danger there.

[pcwalton]

> I think the better question for you would be, what's the better way to develop network protocols like this, then? Assuming that purpose, I can't think of anything to criticize here except maybe they should have limited testing to beta and dev users of Chrome. However, that limits your test data and normally that sort of thing is done to make sure web compatibility isn't broken in the future by changing standards, and given that browsers already negotiate protocols, I don't see an imminent danger there.

As I mentioned in my reply to tptacek, I'm not intending to call out QUIC specifically here; the point is simply that open source and open standards are not equivalent. Shipping implementations is fine as long as there are effective safeguards to prevent lock-in.

What we have to make sure we avoid is something like the -webkit CSS prefix situation, where the fact that WebKit was open source did nothing to prevent the mobile Web from very nearly coming to depend on all the quirks of a big pile of C++. (That situation is also an example of standardization leading to better outcomes—remember how bad the WebKit-specific "-webkit-gradient(linear, color-stop(foo), ...)" syntax was?)