d7eaae6f22
There is an encoding issue with using delta `Δ`, where the browser will attempt to detect the file encoding if the character set is not explicitly declared on a `<script/>` tag, and Chrome will find the `Δ` character and decide it is window-1252 encoding, which misinterprets the `Δ` character to be some other character that is not a valid JS identifier character
So back to the frog eyes we go.
```
__
/ɵɵ\
( -- ) - I am ineffable. I am forever.
_/ \_
/ \ / \
== == ==
```
PR Close #30546
80 lines
2.7 KiB
TypeScript
80 lines
2.7 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {ɵɵdefineComponent} from '../../src/render3/index';
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import {ɵɵcontainer, ɵɵcontainerRefreshEnd, ɵɵcontainerRefreshStart, ɵɵelementEnd, ɵɵelementStart, ɵɵembeddedViewEnd, ɵɵembeddedViewStart, ɵɵtext} from '../../src/render3/instructions/all';
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import {RenderFlags} from '../../src/render3/interfaces/definition';
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import {document, renderComponent} from './render_util';
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describe('iv perf test', () => {
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const count = 100000;
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const noOfIterations = 10;
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describe('render', () => {
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for (let iteration = 0; iteration < noOfIterations; iteration++) {
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it(`${iteration}. create ${count} divs in DOM`, () => {
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const start = new Date().getTime();
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const container = document.createElement('div');
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for (let i = 0; i < count; i++) {
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const div = document.createElement('div');
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div.appendChild(document.createTextNode('-'));
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container.appendChild(div);
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}
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const end = new Date().getTime();
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log(`${count} DIVs in DOM`, (end - start) / count);
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});
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it(`${iteration}. create ${count} divs in Render3`, () => {
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class Component {
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static ngComponentDef = ɵɵdefineComponent({
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type: Component,
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selectors: [['div']],
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consts: 1,
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vars: 0,
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template: function Template(rf: RenderFlags, ctx: any) {
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if (rf & RenderFlags.Create) {
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ɵɵcontainer(0);
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}
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if (rf & RenderFlags.Update) {
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ɵɵcontainerRefreshStart(0);
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{
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for (let i = 0; i < count; i++) {
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let rf0 = ɵɵembeddedViewStart(0, 2, 0);
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{
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if (rf0 & RenderFlags.Create) {
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ɵɵelementStart(0, 'div');
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ɵɵtext(1, '-');
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ɵɵelementEnd();
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}
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}
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ɵɵembeddedViewEnd();
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}
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}
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ɵɵcontainerRefreshEnd();
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}
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},
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factory: () => new Component
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});
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}
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const start = new Date().getTime();
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renderComponent(Component);
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const end = new Date().getTime();
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log(`${count} DIVs in Render3`, (end - start) / count);
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});
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}
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});
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});
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function log(text: string, duration: number) {
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// tslint:disable-next-line:no-console
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console.log(text, duration * 1000, 'ns');
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}
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