{"id":1701,"date":"2026-10-26T09:43:46","date_gmt":"2026-10-26T09:43:46","guid":{"rendered":"https:\/\/www.haartyhanks.com\/blog\/?p=1701"},"modified":"2026-11-02T09:47:16","modified_gmt":"2026-11-02T09:47:16","slug":"website-stress-testing-black-friday","status":"publish","type":"post","link":"https:\/\/www.haartyhanks.com\/blog\/website-stress-testing-black-friday\/","title":{"rendered":"Is Your Website Ready for a Traffic Surge? How to Stress-Test Before Black Friday"},"content":{"rendered":"<p><span data-contrast=\"none\">Website stress testing means deliberately pushing your site beyond its expected traffic to find the point where it slows or fails, so you can fix it before customers find it. Black Friday falls on 27 November 2026, which leaves about seven weeks. Here is how to prepare your website for Black Friday, step by step.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<h2 aria-level=\"2\"><span data-contrast=\"none\">What Is Website Stress Testing?<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:360,&quot;335559739&quot;:120}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"none\">Website stress testing puts your site under heavier traffic than it would normally receive. The aim is to find its limits and identify weaknesses before they affect customers. It is one of several ways to assess website performance.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p aria-level=\"3\"><span data-contrast=\"none\">Load Testing vs Stress Testing vs Spike Testing<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:320,&quot;335559739&quot;:80}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Each test answers a different question, as Grafana&#8217;s<\/span><strong><a href=\"https:\/\/k6.io\/docs\/test-types\/\"> k6 documentation<\/a><\/strong><span data-contrast=\"none\"> explains:<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ul>\n<li><b><span data-contrast=\"none\">Load test: <\/span><\/b><span data-contrast=\"none\">Checks how the site performs under expected traffic levels<\/span><b><span data-contrast=\"none\">.<\/span><\/b><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><b><span data-contrast=\"none\">Stress test: <\/span><\/b><span data-contrast=\"none\">Pushes traffic beyond expected levels to see where performance starts to break down.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><b><span data-contrast=\"none\">Spike test: <\/span><\/b><span data-contrast=\"none\">Simulates a sudden surge, such as a flash sale email sending large numbers of visitors to your site.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><b><span data-contrast=\"none\">Soak test: <\/span><\/b><span data-contrast=\"none\">Keeps traffic running over several hours to check whether performance deteriorates over time.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<h3 aria-level=\"2\"><span data-contrast=\"none\">Why Stress Test Before Black Friday?<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:360,&quot;335559739&quot;:120}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"none\">Problems that go unnoticed on a normal trading day can quickly become expensive when traffic peaks. With more customers browsing and buying at once, slow pages or failed checkouts can cost you sales just when demand is highest.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">PwC estimated<\/span><strong><a href=\"https:\/\/www.lbc.co.uk\/article\/when-black-friday-2026-5HjdjcT_2\/\"> UK Black Friday spending at \u00a36.4 billion in 2025<\/a><\/strong><span data-contrast=\"none\">. If your website struggles to cope, you risk:<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">Abandoned baskets and wasted ad spend.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Slower crawling, since Googlebot<\/span><strong><a href=\"https:\/\/developers.google.com\/crawling\/docs\/troubleshooting\/http-status-codes\"> reduces its crawl rate<\/a><\/strong><span data-contrast=\"none\"> when it meets significant 5xx or 429 errors.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Late discovery of bottlenecks in checkout, databases or payment steps.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<h2 aria-level=\"2\"><span data-contrast=\"none\">How to Stress Test Your Website for Black Friday<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:360,&quot;335559739&quot;:120}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"none\">Start with a staging environment that closely mirrors your live website. Increase the simulated traffic in stages and monitor response times, errors and resource usage throughout each test. This is what practical e-commerce site Black Friday preparation looks like.\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ol>\n<li><span data-contrast=\"none\">Set a traffic target using last year\u2019s peak figures, with an additional margin to account for higher demand.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Tell your hosting provider, CDN provider and payment providers about your plans. Never load-test third-party services without their permission.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Script real journeys: search, product page, basket and checkout, not just the homepage.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Start with a smoke test, then run load, stress and spike tests, as k6 advises running stress tests only after average-load tests.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Monitor response times, error rates, server resources and database usage. These figures can show where performance starts to deteriorate.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Fix the biggest bottleneck first, then repeat the tests to check whether the changes have worked.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ol>\n<h3 aria-level=\"3\"><span data-contrast=\"none\">How to Prevent a Crash on the Day<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:320,&quot;335559739&quot;:80}\">\u00a0<\/span><\/h3>\n<p><span data-contrast=\"none\">Testing gives you a clearer idea of what needs attention before Black Friday arrives. In its<\/span><strong><a href=\"https:\/\/www.ncsc.gov.uk\/guidance\/preparing-denial-service-dos-attacks\"> guidance on denial of service attacks<\/a><\/strong><span data-contrast=\"none\">, the NCSC recommends designing services to scale for surges in use and to degrade gracefully. In practice, this means:\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"none\">Caching suitable pages, such as category and product pages, through a CDN to reduce the load on your servers.\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Adding capacity or enabling autoscaling, where your hosting supports it, before the sale begins.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Optimising large images and resource-heavy scripts to improve page speed.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Freezing code changes before Black Week to reduce the risk of introducing new problems.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:0}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"none\">Setting up alerts for slow pages, rising error rates and other signs of trouble.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:0,&quot;335559739&quot;:240}\">\u00a0<\/span><\/li>\n<\/ul>\n<h2 aria-level=\"2\"><span data-contrast=\"none\">Get Your Site Black Friday Ready with Haarty Hanks<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:360,&quot;335559739&quot;:120}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"none\">A website that handles peak traffic gives your SEO and advertising efforts a better chance of turning visits into sales. The<\/span><strong><a href=\"https:\/\/www.haartyhanks.com\/web-development.html\"> web development<\/a><\/strong><span data-contrast=\"none\"> and<\/span><strong><a href=\"https:\/\/www.haartyhanks.com\/seo-services.html\"> SEO services<\/a><\/strong><span data-contrast=\"none\"> teams at Haarty Hanks can review your site speed, technical health and crawlability before the busiest trading period.<\/span><strong><a href=\"https:\/\/www.haartyhanks.com\/contact.html\"> Get in touch<\/a><\/strong><span data-contrast=\"none\"> to identify problems while there is still time to address them.\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<h3 aria-level=\"2\"><span data-contrast=\"none\">FAQs<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;134245418&quot;:true,&quot;134245529&quot;:true,&quot;335559738&quot;:360,&quot;335559739&quot;:120}\">\u00a0<\/span><\/h3>\n<p><b><span data-contrast=\"none\">What is website stress testing?<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Website stress testing simulates traffic beyond normal levels to find the point where a site slows down or fails. It shows which part breaks first, so you can strengthen it before a major sales event.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">What is the difference between load testing and stress testing?<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Load testing checks performance under expected traffic, while stress testing pushes beyond that to find the limit. Most teams run load tests first, then stress tests.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">When should I start stress testing for Black Friday?<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Start as early as possible. Allow time to fix problems and retest, ideally finishing before Black Week begins around 23 November, when many retailers launch deals.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">Can I stress test my live website?<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">It is safer to test a staging copy, because live testing can cause outages or trigger security tools. Warn your host first, and never test third-party services without permission.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><b><span data-contrast=\"none\">How do I stop my website crashing during a traffic spike?<\/span><\/b><span data-contrast=\"none\">\u00a0<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Use CDN caching, add capacity or autoscaling, optimise heavy pages, monitor in real time and prepare a response plan. Website crash prevention is easier when problems are found and fixed in advance.<\/span><span data-ccp-props=\"{&quot;134233117&quot;:false,&quot;134233118&quot;:false,&quot;335559738&quot;:240,&quot;335559739&quot;:240}\">\u00a0<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Website stress testing means deliberately pushing your site beyond its expected traffic to find the point where it slows or fails, so you can fix it before customers find it. Black Friday falls on 27 November 2026, which leaves about seven weeks. Here is how to prepare your website for Black Friday, step by step.\u00a0 &hellip;<\/p>\n","protected":false},"author":1,"featured_media":1702,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[654,657,653,651,656,658,652,655],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Website Stress Testing Before Black Friday: A UK Guide<\/title>\n<meta name=\"description\" content=\"Learn how website stress testing helps you handle traffic spikes, prevent crashes and prepare your site for Black Friday with a step-by-step UK guide.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.haartyhanks.com\/blog\/website-stress-testing-black-friday\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Website Stress Testing Before Black Friday: A UK Guide\" \/>\n<meta property=\"og:description\" content=\"Learn how website stress testing helps you handle traffic spikes, prevent crashes and prepare your site for Black Friday with a step-by-step UK guide.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.haartyhanks.com\/blog\/website-stress-testing-black-friday\/\" \/>\n<meta property=\"og:site_name\" content=\"Haarty Hanks\" \/>\n<meta property=\"article:published_time\" content=\"2026-10-26T09:43:46+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-11-02T09:47:16+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.haartyhanks.com\/blog\/wp-content\/uploads\/2026\/11\/Is-Your-Website-Ready-for-a-Traffic-Surge-How-to-Stress-Test-Before-Black-Friday.png\" \/>\n\t<meta property=\"og:image:width\" content=\"2172\" \/>\n\t<meta property=\"og:image:height\" content=\"724\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Haarty Hanks\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Haarty Hanks\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.haartyhanks.com\/blog\/website-stress-testing-black-friday\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.haartyhanks.com\/blog\/website-stress-testing-black-friday\/\"},\"author\":{\"name\":\"Haarty Hanks\",\"@id\":\"https:\/\/www.haartyhanks.com\/blog\/#\/schema\/person\/b5b1900103e9bc4a9eaf43d5db3aa933\"},\"headline\":\"Is Your Website Ready for a Traffic Surge? 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