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Merged
texodus merged 1 commit into from
Jan 19, 2026
+964 −234
Merged

Add benchmark suite and profile-guided optimizations #248

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279 changes: 279 additions & 0 deletions benchmarks/benchmark.html
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-- ┃ * Copyright (c) 2020, the Regular Table Authors. This file is part * ┃
-- ┃ * of the Regular Table library, distributed under the terms of the * ┃
-- ┃ * [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0). * ┃
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-->

<!doctype html>
<html>
<head>
<meta
name="viewport"
content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"
/>
<link rel="stylesheet" href="../dist/css/material.css" />
<style>
body {
margin: 0;
padding: 0;
}

regular-table {
width: 100vw;
height: 100vh;
box-sizing: border-box;
}

td {
color: #1078d1;
}

/* Alternating row colors for visual complexity */
tbody tr:nth-child(even) {
background-color: #f8f9fa;
}

/* Highlight negative values */
td.negative {
color: #dc3545;
}

/* Highlight large values */
td.large {
font-weight: bold;
color: #28a745;
}
</style>
</head>

<body>
<regular-table id="table"></regular-table>

<script type="module">
import "../dist/esm/regular-table.js";

// Configuration - can be overridden via URL params
const params = new URLSearchParams(window.location.search);
const NUM_ROWS = parseInt(params.get("rows") || "100000", 10);
const NUM_COLUMNS = parseInt(params.get("columns") || "10000", 10);
const HEADER_DEPTH = parseInt(params.get("headerDepth") || "4", 10);
const SIMULATE_LATENCY = parseInt(params.get("latency") || "0", 10);

// // Various formatters for complex data
// const numberFormatter = new Intl.NumberFormat("en-us");
// const currencyFormatter = new Intl.NumberFormat("en-us", {
// style: "currency",
// currency: "USD",
// });

// const percentFormatter = new Intl.NumberFormat("en-us", {
// style: "percent",
// minimumFractionDigits: 2,
// });

// const dateFormatter = new Intl.DateTimeFormat("en-us", {
// year: "numeric",
// month: "short",
// day: "numeric",
// });

// Pseudo-random number generator with seed for reproducibility
function seededRandom(seed) {
const x = Math.sin(seed) * 10000;
return x - Math.floor(x);
}

// Generate a random string of n characters
function randomString(n) {
const chars =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
let result = "";
for (let i = 0; i < n; i++) {
result += chars.charAt(
Math.floor(Math.random() * chars.length),
);
}
return result;
}

const STRINGS = Array(200)
.fill(0)
.map(() => randomString(8));

// Generate complex cell data based on position
function generateCellData(x, y) {
const seed = x * 0xdeadbeef + y;
const rand = seededRandom(seed);
const type = x % 2;
switch (type) {
case 0:
return Math.floor(rand * 1000000) - 500000;
case 1:
return STRINGS[Math.floor(rand * STRINGS.length)];
}
}

// Generate hierarchical headers
function generateColumnHeaders(x) {
const headers = [];
if (HEADER_DEPTH >= 1) {
headers.push(`Sector ${Math.floor(x / 100)}`);
}

if (HEADER_DEPTH >= 2) {
headers.push(`Group ${Math.floor(x / 10)}`);
}

if (HEADER_DEPTH >= 3) {
headers.push(`Col ${x}`);
}

return headers;
}

function generateRowHeaders(y) {
const headers = [];
if (HEADER_DEPTH >= 1) {
headers.push(`Region ${Math.floor(y / 100)}`);
}

if (HEADER_DEPTH >= 2) {
headers.push(`Category ${Math.floor(y / 10)}`);
}

if (HEADER_DEPTH >= 3) {
headers.push(`Row ${y}`);
}

return headers;
}

// Complex data listener with optional simulated latency
async function dataListener(x0, y0, x1, y1) {
// Simulate network/computation latency if configured
if (SIMULATE_LATENCY > 0) {
await new Promise((resolve) =>
setTimeout(resolve, SIMULATE_LATENCY),
);
}

const data = [];
const column_headers = [];

for (let x = x0; x < x1; x++) {
const column = [];
data.push(column);
column_headers.push(generateColumnHeaders(x));

for (let y = y0; y < y1; y++) {
column.push(generateCellData(x, y));
}
}

const row_headers = [];
for (let y = y0; y < y1; y++) {
row_headers.push(generateRowHeaders(y));
}

return {
num_rows: NUM_ROWS,
num_columns: NUM_COLUMNS,
row_headers,
column_headers,
data,
};
}

// Style listener to add CSS classes based on cell content
function styleListener() {
const table = document.getElementById("table");
for (const td of table.querySelectorAll("tbody td")) {
const text = td.textContent;
td.classList.remove("negative", "large");

// Check for negative values
if (text.startsWith("-") || text.startsWith("($")) {
td.classList.add("negative");
}

// Check for large positive values
const numMatch = text.replace(/[$,%]/g, "").match(/[\d.]+/);
if (numMatch) {
const num = parseFloat(numMatch[0]);
if (num > 100000) {
td.classList.add("large");
}
}
}
}

// Initialize table
const table = document.getElementById("table");
table.setDataListener(dataListener);
table.addStyleListener(styleListener);
await table.draw();

// Expose benchmark utilities to window for Playwright access
window.benchmarkConfig = {
numRows: NUM_ROWS,
numColumns: NUM_COLUMNS,
headerDepth: HEADER_DEPTH,
simulateLatency: SIMULATE_LATENCY,
};

window.scrollRight = async function (pixels = 100) {
table.scrollLeft += pixels;
await table.draw();
};

window.scrollDown = async function (pixels = 100) {
table.scrollTop += pixels;
await table.draw();
};

window.scrollDiagonal = async function (
pixelsX = 50,
pixelsY = 50,
) {
table.scrollLeft += pixelsX;
table.scrollTop += pixelsY;
await table.draw();
};

window.scrollToPosition = async function (left, top) {
table.scrollLeft = left;
table.scrollTop = top;
await table.draw();
};

window.getTableMetrics = function () {
const fps = table.getDrawFPS();
return {
fps: fps,
scrollLeft: table.scrollLeft,
scrollTop: table.scrollTop,
scrollWidth: table.scrollWidth,
scrollHeight: table.scrollHeight,
visibleCells: table.querySelectorAll("tbody td").length,
visibleRows: table.querySelectorAll("tbody tr").length,
};
};

window.resetScroll = async function () {
table.scrollLeft = 0;
table.scrollTop = 0;
await table.draw();
};

// Signal that the benchmark page is ready
window.benchmarkReady = true;
</script>
</body>
</html>
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