svgedit
Version:
Powerful SVG-Editor for your browser
239 lines (206 loc) • 10.4 kB
JavaScript
/* eslint-disable max-len, no-console */
import 'pathseg'
import { NS } from '../../../packages/svgcanvas/core/namespaces.js'
import * as utilities from '../../../packages/svgcanvas/core/utilities.js'
import * as math from '../../../packages/svgcanvas/core/math.js'
import * as units from '../../../packages/svgcanvas/core/units.js'
describe('utilities performance', function () {
let currentLayer; let groupWithMatrixTransform; let textWithMatrixTransform
units.init({ getRoundDigits: () => 2 }) // mock getRoundDigits
beforeEach(() => {
document.body.textContent = ''
const style = document.createElement('style')
style.id = 'styleoverrides'
style.media = 'screen'
style.textContent = `
#svgcanvas svg * {
cursor: move;
pointer-events: all
}
#svgcanvas svg {
cursor: default
}`
document.head.append(style)
const editor = new DOMParser().parseFromString(`<div id="svg_editor">
<div id="workarea" style="cursor: auto; overflow: scroll; line-height: 12px; right: 100px;">
<!-- Must include this thumbnail view to see some of the performance issues -->
<svg id="overviewMiniView" width="132" height="112.5" x="0" y="0" viewBox="100 100 1000 1000" style="float: right;"
xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<use x="0" y="0" href="#svgroot"></use>
</svg>
<div id="svgcanvas" style="position: relative; width: 1000px; height: 1000px;">
<svg id="svgroot" xmlns="http://www.w3.org/2000/svg" xlinkns="http://www.w3.org/1999/xlink" width="1000" height="1000" x="640" y="480" overflow="visible">
<defs><filter id="canvashadow" filterUnits="objectBoundingBox"><feGaussianBlur in="SourceAlpha" stdDeviation="4" result="blur"></feGaussianBlur><feOffset in="blur" dx="5" dy="5" result="offsetBlur"></feOffset><feMerge><feMergeNode in="offsetBlur"></feMergeNode><feMergeNode in="SourceGraphic"></feMergeNode></feMerge></filter><pattern id="gridpattern" patternUnits="userSpaceOnUse" x="0" y="0" width="100" height="100"><image x="0" y="0" width="100" height="100"></image></pattern></defs>
<svg id="canvasBackground" width="1000" height="200" x="10" y="10" overflow="none" style="pointer-events:none"><rect width="100%" height="100%" x="0" y="0" stroke="#000" fill="#000" style="pointer-events:none"></rect><svg id="canvasGrid" width="100%" height="100%" x="0" y="0" overflow="visible" display="none" style="display: inline;"><rect width="100%" height="100%" x="0" y="0" stroke-width="0" stroke="none" fill="url(#gridpattern)" style="pointer-events: none; display:visible;"></rect></svg></svg>
<animate attributeName="opacity" begin="indefinite" dur="1" fill="freeze"></animate>
<svg id="svgcontent" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 1000 480" overflow="visible" width="1000" height="200" x="100" y="20">
<g id="layer1">
<title>Layer 1</title>
<g id="svg_group_with_matrix_transform" transform="matrix(0.5, 0, 0, 0.5, 10, 10)">
<svg id="svg_2" x="100" y="0" class="symbol" preserveAspectRatio="xMaxYMax">
<g id="svg_3">
<rect id="svg_4" x="0" y="0" width="20" height="20" fill="#00FF00"></rect>
</g>
<g id="svg_5" display="none">
<rect id="svg_6" x="0" y="0" width="20" height="20" fill="#A40000"></rect>
</g>
</svg>
</g>
<text id="svg_text_with_matrix_transform" transform="matrix(0.433735, 0, 0, 0.433735, 2, 4)" xml:space="preserve" text-anchor="middle" font-family="serif" font-size="24" y="0" x="61" stroke="#999999" fill="#999999">Some text</text>
</g>
<g>
<title>Layer 2</title>
</g>
</svg>
</svg>
</div>
</div></div>`, 'application/xml')
const newNode = document.body.ownerDocument.importNode(editor.documentElement, true)
document.body.append(newNode)
currentLayer = document.getElementById('layer1')
groupWithMatrixTransform = document.getElementById('svg_group_with_matrix_transform')
textWithMatrixTransform = document.getElementById('svg_text_with_matrix_transform')
})
/**
* Create an SVG element for a mock.
* @param {module:utilities.SVGElementJSON} jsonMap
* @returns {SVGElement}
*/
function mockCreateSVGElement (jsonMap) {
const elem = document.createElementNS(NS.SVG, jsonMap.element)
Object.entries(jsonMap.attr).forEach(([attr, value]) => {
elem.setAttribute(attr, value)
})
return elem
}
/**
* Mock of {@link module:utilities.EditorContext#addSVGElementsFromJson}.
* @param {module:utilities.SVGElementJSON} json
* @returns {SVGElement}
*/
function mockaddSVGElementsFromJson (json) {
const elem = mockCreateSVGElement(json)
currentLayer.append(elem)
return elem
}
/**
* Toward performance testing, fill document with clones of element.
* @param {SVGElement} elem
* @param {Integer} count
* @returns {void}
*/
function fillDocumentByCloningElement (elem, count) {
const elemId = elem.getAttribute('id') + '-'
for (let index = 0; index < count; index++) {
const clone = elem.cloneNode(true) // t: deep clone
// Make sure you set a unique ID like a real document.
clone.setAttribute('id', elemId + index)
const { parentNode } = elem
parentNode.append(clone)
}
}
const mockPathActions = {
resetOrientation (path) {
if (path?.nodeName !== 'path') { return false }
const tlist = path.transform.baseVal
const m = math.transformListToTransform(tlist).matrix
tlist.clear()
path.removeAttribute('transform')
const segList = path.pathSegList
const len = segList.numberOfItems
// let lastX, lastY;
for (let i = 0; i < len; ++i) {
const seg = segList.getItem(i)
const type = seg.pathSegType
if (type === 1) {
continue
}
const pts = [];
['', 1, 2].forEach(function (n) {
const x = seg['x' + n]
const y = seg['y' + n]
if (x !== undefined && y !== undefined) {
const pt = math.transformPoint(x, y, m)
pts.splice(pts.length, 0, pt.x, pt.y)
}
})
// path.replacePathSeg(type, i, pts, path);
}
return undefined
}
}
// //////////////////////////////////////////////////////////
// Performance times with various browsers on Macbook 2011 8MB RAM OS X El Capitan 10.11.4
//
// To see 'Before Optimization' performance, making the following two edits.
// 1. utilities.getStrokedBBox - change if( elems.length === 1) to if( false && elems.length === 1)
// 2. utilities.getBBoxWithTransform - uncomment 'Old technique that was very slow'
// Chrome
// Before Optimization
// Pass1 svgCanvas.getStrokedBBox total ms 4,218, ave ms 41.0, min/max 37 51
// Pass2 svgCanvas.getStrokedBBox total ms 4,458, ave ms 43.3, min/max 32 63
// Optimized Code
// Pass1 svgCanvas.getStrokedBBox total ms 1,112, ave ms 10.8, min/max 9 20
// Pass2 svgCanvas.getStrokedBBox total ms 34, ave ms 0.3, min/max 0 20
// Firefox
// Before Optimization
// Pass1 svgCanvas.getStrokedBBox total ms 3,794, ave ms 36.8, min/max 33 48
// Pass2 svgCanvas.getStrokedBBox total ms 4,049, ave ms 39.3, min/max 28 53
// Optimized Code
// Pass1 svgCanvas.getStrokedBBox total ms 104, ave ms 1.0, min/max 0 23
// Pass2 svgCanvas.getStrokedBBox total ms 71, ave ms 0.7, min/max 0 23
// Safari
// Before Optimization
// Pass1 svgCanvas.getStrokedBBox total ms 4,840, ave ms 47.0, min/max 45 62
// Pass2 svgCanvas.getStrokedBBox total ms 4,849, ave ms 47.1, min/max 34 62
// Optimized Code
// Pass1 svgCanvas.getStrokedBBox total ms 42, ave ms 0.4, min/max 0 23
// Pass2 svgCanvas.getStrokedBBox total ms 17, ave ms 0.2, min/max 0 23
it('Test svgCanvas.getStrokedBBox() performance with matrix transforms', function () {
const { getStrokedBBox } = utilities
const { children } = currentLayer
let lastTime; let now
let min = Number.MAX_VALUE
let max = 0
let total = 0
fillDocumentByCloningElement(groupWithMatrixTransform, 50)
fillDocumentByCloningElement(textWithMatrixTransform, 50)
// The first pass through all elements is slower.
const count = children.length
const start = lastTime = now = Date.now()
// Skip the first child which is the title.
for (let index = 1; index < count; index++) {
const child = children[index]
/* const obj = */ getStrokedBBox([child], mockaddSVGElementsFromJson, mockPathActions)
now = Date.now(); const delta = now - lastTime; lastTime = now
total += delta
min = Math.min(min, delta)
max = Math.max(max, delta)
}
total = lastTime - start
const ave = total / count
assert.isBelow(ave, 20, 'svgedit.utilities.getStrokedBBox average execution time is less than 20 ms')
console.log('Pass1 svgCanvas.getStrokedBBox total ms ' + total + ', ave ms ' + ave.toFixed(1) + ',\t min/max ' + min + ' ' + max)
return new Promise((resolve) => {
// The second pass is two to ten times faster.
setTimeout(function () {
const ct = children.length
const strt = lastTime = now = Date.now()
// Skip the first child which is the title.
for (let index = 1; index < ct; index++) {
const child = children[index]
/* const obj = */ getStrokedBBox([child], mockaddSVGElementsFromJson, mockPathActions)
now = Date.now(); const delta = now - lastTime; lastTime = now
total += delta
min = Math.min(min, delta)
max = Math.max(max, delta)
}
total = lastTime - strt
const avg = total / ct
assert.isBelow(avg, 2, 'svgedit.utilities.getStrokedBBox average execution time is less than 1 ms')
console.log('Pass2 svgCanvas.getStrokedBBox total ms ' + total + ', ave ms ' + avg.toFixed(1) + ',\t min/max ' + min + ' ' + max)
resolve()
})
})
})
})