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perf(ivy): avoid storing raw selectors in projectionDef (#29578)

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Currently in Ivy we pass both the raw and parsed selectors to the projectionDef instruction, because the parsed selectors are used to match most nodes, whereas the raw ones are used to match against nodes with the ngProjectAs attribute. The raw selectors add a fair bit of code that won't be used in most cases, because ngProjectAs is somewhat rare.

These changes rework the compiler not to output the raw selectors in the projectionDef, but to parse the selector in ngProjectAs and to store it on the TAttributes. The logic for matching has also been changed so that it matches the pre-parsed ngProjectAs selector against the list of projection selectors.

PR Close #29578
This commit is contained in:
Kristiyan Kostadinov
2019-04-08 22:47:23 +02:00
committed by Igor Minar
parent f98093a30d
commit def73a6728
18 changed files with 344 additions and 163 deletions
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25
packages/core/src/render3/interfaces/node.ts
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@ -6,6 +6,7 @@
* found in the LICENSE file at https://angular.io/license
*/
import {CssSelector} from './projection';
import {RNode} from './renderer';
import {StylingContext} from './styling';
import {LView, TView} from './view';
@ -163,14 +164,32 @@ export const enum AttributeMarker {
* ```
*/
Template = 4,
/**
* Signals that the following attribute is `ngProjectAs` and its value is a parsed `CssSelector`.
*
* For example, given the following HTML:
*
* ```
* <h1 attr="value" ngProjectAs="[title]">
* ```
*
* the generated code for the `element()` instruction would include:
*
* ```
* ['attr', 'value', AttributeMarker.ProjectAs, ['', 'title', '']]
* ```
*/
ProjectAs = 5
}
/**
* A combination of:
* - attribute names and values
* - special markers acting as flags to alter attributes processing.
* - Attribute names and values.
* - Special markers acting as flags to alter attributes processing.
* - Parsed ngProjectAs selectors.
*/
export type TAttributes = (string | AttributeMarker)[];
export type TAttributes = (string | AttributeMarker | CssSelector)[];
/**
* Binding data (flyweight) for a particular node that is shared between all templates