LGTM to ship.

On Mon, Mar 17, 2014 at 4:47 PM, Andreas Rossberg <[email protected]>wrote:

> We intend to soon ship both ES6 promises and weak collections
> unflagged in V8. Since the former depends on the latter, I'm combining
> both in this mail.
>
>
> PROMISES
>
> Promises have been accepted into ES6, and have hit the draft spec
> earlier this year [1]. They are already used in DOM APIs. Mozilla also
> plans to ship promises in FF25. The current implementation of promises
> in Chrome lives in Blink, a V8-side implementation has been done last
> fall.
>
> We intend to ship Chrome 35 with the V8 implementation replacing the
> Blink one, since it is more up-to-date wrt the latest spec changes,
> and (we believe) more efficient. That means that V8 will turn on
> promises by default (they are currently being moved to es-staging).
>
> Owners: [email protected], [email protected]
>
> [1]
> http://people.mozilla.org/~jorendorff/es6-draft.html#sec-promise-objects
>
>
> WEAK COLLECTIONS
>
> Weak maps and sets have been in the ES6 draft for a long time [2, 3],
> and our implementation has been stable for years. Moreover, it is
> (under internal APIs) already used in shipping features, such as
> Object.observe.
>
> Our self-hosted implementation of promises uses ES6 weak maps
> internally. Due to this dependency, we are moving both features to
> staging simultaneously, and intend to ship them together.
>
> Owner: [email protected]
>
> [2]
> http://people.mozilla.org/~jorendorff/es6-draft.html#sec-weakmap-objects
> [3]
> http://people.mozilla.org/~jorendorff/es6-draft.html#sec-weakset-objects
>
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