Auto merge of #8227 - asajeffrey:versioned_dom, r=eefriedman

Versioned dom

This PR adds versioning to the DOM. There are now node.get_version and node.get_descendent_version methods that return a counter that is bumped when the node is dirtied. This is used to implement cache invalidation for caching HTMLCollection state. Caching HTMCollections gets a 1000x speedup in the Dromaeo DOM query tests.

Addresses https://github.com/servo/servo/issues/6901, https://github.com/servo/servo/issues/3381 and https://github.com/servo/servo/issues/1916.

Replaces PR https://github.com/servo/servo/pull/6927.

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/servo/8227)
<!-- Reviewable:end -->
This commit is contained in:
bors-servo 2015-11-10 01:11:23 +05:30
commit f39faaf994
7 changed files with 325 additions and 89 deletions

View file

@ -81,7 +81,7 @@ use std::rc::Rc;
use std::sync::Arc;
use std::sync::atomic::AtomicBool;
use std::sync::mpsc::{Receiver, Sender};
use string_cache::{Atom, Namespace};
use string_cache::{Atom, Namespace, QualName};
use style::properties::PropertyDeclarationBlock;
use style::values::specified::Length;
use url::Url;
@ -257,7 +257,7 @@ no_jsmanaged_fields!(Size2D<T>);
no_jsmanaged_fields!(Arc<T>);
no_jsmanaged_fields!(Image, ImageCacheChan, ImageCacheTask);
no_jsmanaged_fields!(Metadata);
no_jsmanaged_fields!(Atom, Namespace);
no_jsmanaged_fields!(Atom, Namespace, QualName);
no_jsmanaged_fields!(Trusted<T: Reflectable>);
no_jsmanaged_fields!(PropertyDeclarationBlock);
no_jsmanaged_fields!(HashSet<T>);