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

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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.

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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
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4
components/util/mem.rs
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@ -37,7 +37,7 @@ use std::result::Result;
use std::sync::Arc;
use str::{DOMString, LengthOrPercentageOrAuto};
use string_cache::atom::Atom;
use string_cache::namespace::Namespace;
use string_cache::namespace::{QualName, Namespace};
use url;
extern {
@ -420,7 +420,7 @@ known_heap_size!(0, bool, f32, f64);
known_heap_size!(0, Rect<T>, Point2D<T>, Size2D<T>, Matrix2D<T>, SideOffsets2D<T>, Range<T>);
known_heap_size!(0, Length<T, U>, ScaleFactor<T, U, V>);
known_heap_size!(0, Au, WritingMode, CSSParserColor, Color, RGBA, Cursor, Matrix4, Atom, Namespace);
known_heap_size!(0, Au, WritingMode, CSSParserColor, Color, RGBA, Cursor, Matrix4, QualName, Atom, Namespace);
known_heap_size!(0, JSVal, PagePx, ViewportPx, DevicePixel, QuirksMode, OsRng, RawStatus);
known_heap_size!(0, TokenSerializationType, LengthOrPercentageOrAuto);