I'm referring to the hidden classes that is talked about here: http://code.google.com/apis/v8/design.html#prop_access
So, are the hidden classes mentioned there actually the object Boilerplates, the __proto__, or something else? Is there perhaps some more detailed documentation about the design of v8 internals and data structures (particularly about object layout) that I can read to better understand this issue? Thanks. On Nov 7, 9:27 am, Feng Qian <[EMAIL PROTECTED]> wrote: > Do you mean 'hidden prototype object'? It is like a normal object > except that not accessible by JS code '__proto__'. > > I am not sure if object cloning can help much because you need to fix > whole prototype chain for a cloned object. V8 is doing something like > that for object literals (Boilerplate). > > On Thu, Nov 6, 2008 at 10:11 PM, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > I've got a few questions regarding the representation of hidden > > classes: > > > 1. Which v8 data structure is the hidden class that the v8 literature > > talks about? > > 2. Are hidden classes supposed to be immutable? Or are they mutable > > like any JS Objects? > > 3. If immutable, is it possible to share the hidden classes across > > execution contexts? > > 4. If mutable and not shareable across execution contexts, are there > > any data structures that make up the object that is static meta-data > > that can be shared? > > > The reason for my asking is because I'm wondering if it is possible to > > use object cloning to speed up the process of populating a new context > > with objects. I'm looking for a mechanism (either an existing one or > > to write one myself) that is similar to snapshots. > > > The difference is that the snapshot mechanism seems to serialize the > > entire heap into a data stream that is later reloaded in entirety into > > a new launch of v8. What I want to do instead is to only clone one > > set of objects (as defined by a reference execution context) into a > > new context. Serializing/deserializing this set of objects can be > > done as an advanced exercise later. > > > I'm also hoping that the objects in the new context can reuse all the > > hidden classes from the reference context. This is why I'm asking if > > the hidden classes (which I presume are just collections of metadata) > > are immutable. > > > Please advise. Thanks. --~--~---------~--~----~------------~-------~--~----~ v8-dev mailing list [email protected] http://groups.google.com/group/v8-dev -~----------~----~----~----~------~----~------~--~---
