k6 script to do load test on wordpress page. it will try to gather all the wordpress urls from the sitemaps then do a random visit to those urls. (20% traffic to home and 80% traffic to those random urls)

k6-wordpress-load-test.js

import http from 'k6/http';
import { check, sleep } from 'k6';
import { parseHTML } from 'k6/html';

// CHANGE THIS TO YOUR WORDPRESS URL
const BASE_URL = 'https://wordpress.com/blog/';
const SITEMAP_INDEX_URL = `${BASE_URL}/sitemap.xml`;

export const options = {
    scenarios: {
        ramping_vus: {
            executor: 'ramping-vus',
            startVUs: 100,
            stages: [
                { target: 100, duration: '0s' },
                { target: 1000, duration: '10m' },
            ],
            gracefulRampDown: '0s',
        },
    },
    thresholds: {
        http_req_duration: ['p(95)<2000'], // 95% of requests should be below 2s
    },
};

function isSitemapIndex(xml) {
    // Detect if XML is a sitemap index by checking for <sitemapindex>
    return xml.includes('<sitemapindex');
}

function parseSitemapIndex(xml) {
    const doc = parseHTML(xml);
    const locs = [];
    doc.find('sitemap > loc').toArray().forEach((el) => {
        locs.push(el.text());
    });
    return locs;
}

function parseSitemapUrls(xml) {
    const doc = parseHTML(xml);
    const urls = [];
    doc.find('url > loc').toArray().forEach((el) => {
        urls.push(el.text());
    });
    return urls;
}

function fetchAllUrlsFromSitemap(url) {
    let urls = [];
    const res = http.get(url);
    if (!res || res.status !== 200) {
        return urls;
    }
    const xml = res.body;
    if (isSitemapIndex(xml)) {
        // Recursively follow sitemap indexes
        const subSitemaps = parseSitemapIndex(xml);
        subSitemaps.forEach((subUrl) => {
            urls = urls.concat(fetchAllUrlsFromSitemap(subUrl));
        });
    } else {
        urls = urls.concat(parseSitemapUrls(xml));
    }
    return urls;
}

export function setup() {
    const allUrls = fetchAllUrlsFromSitemap(SITEMAP_INDEX_URL);
    // Exclude only the homepage, include all other URLs (posts, pages, categories, tags, etc.)
    const filtered = allUrls.filter((url) => url !== BASE_URL + '/');
    console.log('All URLs from all nested sitemaps:', allUrls);
    console.log('Filtered URLs (excluding homepage):', filtered);
    return { urls: filtered };
}

export default function (data) {
    const { urls } = data;
    const rand = Math.random();
    let targetUrl;

    if (rand < 0.2 || urls.length === 0) {
        targetUrl = BASE_URL + '/';
    } else {
        targetUrl = urls[Math.floor(Math.random() * urls.length)];
        //console.log(`Visiting: ${targetUrl}`);
    }
    const res = http.get(targetUrl);
    check(res, {
        'status is 200': (r) => r.status === 200,
    });
    sleep(Math.random() * 2 + 1); // sleep 1-3s
}