PivotEngine Performance (React)

The PivotEngine can summarize large data sets, either on the client or on the server. Either way, data summaries are generated asynchronously, so the UI remains responsive while the data is being summarized.

This example demonstrates performance by showing the time it takes to summarize client-side data sets of different sizes.

If your data sets are really large (millions of records), you should consider using server-side OLAP providers like SSAS cubes or ComponentOne Data Services. The PivotEngine can connect to either.

Learn about OLAP | PivotEngine API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useEffect, useRef, useState } from 'react'; import '@mescius/wijmo.touch'; // support drag/drop on touch devices import * as Olap from '@mescius/wijmo.react.olap'; import * as wjcCore from '@mescius/wijmo'; import * as wjcOlap from '@mescius/wijmo.olap'; import './app.css'; import { addData } from './data'; function App() { const [ds10, setDs10] = useState(addData([], 10e3)); const [ds100, setDs100] = useState(null); const [ds500, setDs500] = useState(null); const [ds1M, setDs1M] = useState(null); const [enable100K, setEnable100K] = useState(true); const [enable500K, setEnable500K] = useState(true); const [enable1M, setEnable1M] = useState(true); const [itemsSource, setItemSource] = useState(addData([], 10e3)); const ngRef = useRef(new wjcOlap.PivotEngine({ autoGenerateFields: false, fields: [ { binding: 'date', header: 'Quarter', format: '\"Q\"q yyyy' }, { binding: 'date', header: 'Month', format: 'MMMM' }, { binding: 'agent', header: 'Agent' }, { binding: 'region', header: 'Region' }, { binding: 'platform', header: 'Platform' }, { binding: 'product', header: 'Product' }, { binding: 'sales', header: 'Sales', format: 'c2' }, { binding: 'downloads', header: 'Downloads', format: 'n0' }, { binding: 'revenue', header: 'Revenue', format: 'c2' }, ], itemsSource, showRowTotals: 'Subtotals', rowFields: ['Quarter', 'Region'], columnFields: ['Platform', 'Product'], valueFields: ['Sales', 'Downloads'], updatingView: () => { if (startRef.current == 0) { startRef.current = Date.now(); } }, updatedView: (s) => { let fmt = 'Summarized <b>{cnt:n0}</b> items in <b>{tm:n0}</b>ms'; let tm = Date.now() - startRef.current; let result = wjcCore.format(fmt, { cnt: s.itemsSource.length, tm }); resultRef.current.innerHTML = result; startRef.current = 0; } })); const startRef = useRef(0); const resultRef = useRef(null); const onButtonClick = (e) => { const id = e.target.id; switch (id) { case '10k': ngRef.current.itemsSource = ds10; setItemSource(ds10); break; case '100k': ngRef.current.itemsSource = ds100; setItemSource(ds100); break; case '500k': ngRef.current.itemsSource = ds500; setItemSource(ds500); break; } }; const createDataAsync = (cnt, callback) => { let data = []; addDataAsync(data, cnt, () => { callback(data); }); }; const addDataAsync = (data, cnt, callback) => { setTimeout(() => { addData(data, Math.min(cnt - data.length, 1000)); if (data.length == cnt) { callback(data); } else { addDataAsync(data, cnt, callback); } }); }; useEffect(() => { createDataAsync(100e3, (result) => { setDs100(result); setEnable100K(false); }); createDataAsync(500e3, (result) => { setDs500(result); setEnable500K(false); }); createDataAsync(1e6, (result) => { setDs1M(result); setEnable1M(false); }); }, []); return (<div className="container-fluid"> <div id="buttons" onClick={onButtonClick}> <button id="10k" className="btn btn-primary"> 10k items </button> <button id="100k" className="btn btn-primary" disabled={enable100K}> 100k items </button> <button id="500k" className="btn btn-primary" disabled={enable500K}> 500k items </button> </div> <p ref={resultRef} id="result"/> <div className="output"> <Olap.PivotGrid id="pivotGrid" itemsSource={ngRef.current}/> </div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo OLAP Pivot Engine Performance</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
#buttons { display: flex; margin-bottom: 6px; } #buttons .btn { margin: 6px; white-space: normal; } .output { display: flex; justify-content: center; margin: 6px; } #pivotGrid { width: auto; max-height: 300px; }
var products = [ { product: 'Wijmo', platform: 'Web' }, { product: 'ActiveReports', platform: 'Desktop' }, { product: 'ActiveReportsJS', platform: 'Web' }, { product: 'ComponentOne', platform: 'Desktop' }, { product: 'Spread', platform: 'Desktop' }, { product: 'SpreadJS', platform: 'Web' }, { product: 'GCDocs', platform: 'Desktop' } ]; var agents = [ { agent: 'Ashlyn Dunlop', region: 'East' }, { agent: 'Keith Vang', region: 'East' }, { agent: 'Bobbi Rodrigues', region: 'West' }, { agent: 'Charli Medina', region: 'West' }, { agent: 'Kaitlin Salt', region: 'West' }, ]; function randomInt(min, max) { return Math.floor(Math.random() * (max - min + 1) + min); } export function addData(data, cnt) { var year = new Date().getFullYear(); for (var i = 0; i < cnt; i++) { let productIndex = randomInt(0, 6); let agentIndex = randomInt(0, 4); data.push({ orderId: randomInt(1, 10000), platform: products[productIndex].platform, product: products[productIndex].product, agent: agents[agentIndex].agent, region: agents[agentIndex].region, date: new Date(year - randomInt(0, 2), randomInt(0, 11), randomInt(0, 27)), sales: randomInt(1500, 3500), downloads: randomInt(10, 200), revenue: randomInt(500, 1000) }); } return data; }
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