%PDF-1.4 %âãÏÓ 1 0 obj << /Type /Catalog /Pages 2 0 R >> endobj 2 0 obj << /Type /Pages /Count 3 /Kids [5 0 R 7 0 R 9 0 R] >> endobj 3 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica >> endobj 4 0 obj << /Type /Font /Subtype /Type1 /BaseFont /Helvetica-Bold >> endobj 5 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 595.28 841.89] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents 6 0 R >> endobj 6 0 obj << /Length 5297 >> stream BT /F2 22 Tf 0.06 0.08 0.12 rg 1 0 0 1 46 789.89 Tm (That Slow First Load After Deployment? A Warmup) Tj ET BT /F2 22 Tf 0.06 0.08 0.12 rg 1 0 0 1 46 762.89 Tm (Cache Request Is the Fix You're Missing) Tj ET BT /F2 11 Tf 0.72 0.14 0.18 rg 1 0 0 1 46 725.89 Tm (TechRounder PDF Edition) Tj ET BT /F1 9.5 Tf 0.36 0.39 0.46 rg 1 0 0 1 46 709.89 Tm (Live article:) Tj ET BT /F1 9.5 Tf 0.36 0.39 0.46 rg 1 0 0 1 46 697.39 Tm (https://www.techrounder.com/how-to/that-slow-first-load-after-deployment-a-warmup-cache-request-is-the-fix-you) Tj ET BT /F1 9.5 Tf 0.36 0.39 0.46 rg 1 0 0 1 46 684.89 Tm (re-missing/) Tj ET q 0.82 0.85 0.9 RG 1 w 46 666.39 m 549.28 666.39 l S Q BT /F1 10 Tf 0.24 0.27 0.32 rg 1 0 0 1 46 654.39 Tm (By Vipin PG | Published June 18, 2026 | Updated June 18, 2026 | Format: Guide | 4 min read) Tj ET BT /F2 13 Tf 0.72 0.14 0.18 rg 1 0 0 1 46 631.39 Tm (Quick answer) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 611.39 Tm (After a deployment or server restart, your website cache is wiped clean - meaning the first visitor) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 596.39 Tm (has to wait while the server rebuilds everything from scratch. A warmup cache request fixes this by) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 581.39 Tm (automatically pre-loading your key pages into the cache before any real visitor arrives, so everyone) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 566.39 Tm (gets a fast experience from the very first click.) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 541.39 Tm (You just pushed an update to your website. Everything looks good on your end. But somewhere out) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 526.39 Tm (there, the very first person to visit your site after that deployment is staring at a spinning loader -) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 511.39 Tm (waiting three, four, maybe five seconds for a page to appear. That's the cold cache problem, and it) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 496.39 Tm (happens every single time your cache is cleared. A warmup cache request is the background process) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 481.39 Tm (that solves it quietly, before anyone notices.) Tj ET BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 453.39 Tm (Step 1: Understand Why Your Site Slows Down After Deployment) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 429.39 Tm (When you deploy an update or restart your server, the cache gets wiped. This puts your site in a "cold) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 414.39 Tm (cache" state - every incoming request has to go all the way to the origin server, run database queries,) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 399.39 Tm (compile the page, and send it back. That full round-trip is what causes the slow first load. It doesn't) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 384.39 Tm (last long, but it hits exactly when traffic is highest - right after you publish something new.) Tj ET BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 356.39 Tm (Step 2: Know What a Warmup Cache Request Actually Does) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 332.39 Tm (A warmup cache request is simply an automated visit to your website's important pages - but it) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 317.39 Tm (happens before real users arrive. A script, plugin, or CDN tool sends HTTP requests to your) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 302.39 Tm (homepage, category pages, popular posts, and key landing pages right after deployment. This forces) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 287.39 Tm (the server to build and store the cached version of each page. By the time your first real visitor clicks) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 272.39 Tm (through, the cache is already full and the page loads instantly.) Tj ET BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 244.39 Tm (Step 3: Identify the Pages That Need Warming) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 220.39 Tm (You don't need to warm every URL on your site - just the ones that matter most. Focus on pages that) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 205.39 Tm (get hit first or get the most traffic. Here's a practical starting list:) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 183.39 Tm (- Your homepage) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 166.59 Tm (- Top 5-10 blog posts or product pages) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 149.79 Tm (- Category or archive pages) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 132.99 Tm (- Any landing page tied to a campaign or ad) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 116.19 Tm (- Checkout or sign-up pages \(if applicable\)) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 99.39 Tm (If you're on WordPress, check your Google Analytics or Search Console to find your top-visited) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 84.39 Tm (pages. That list becomes your warmup priority queue.) Tj ET q 0.86 0.88 0.92 RG 1 w 46 42 m 549.28 42 l S Q BT /F1 8.4 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 30 Tm (TechRounder | Page 1 of 3) Tj ET BT /F1 7.2 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 19 Tm (https://www.techrounder.com/pdf/blog/that-slow-first-load-after-deployment-a-warmup-cache-request-is-the-fix-youre-missing.pdf) Tj ET endstream endobj 7 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 595.28 841.89] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents 8 0 R >> endobj 8 0 obj << /Length 5072 >> stream BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 789.89 Tm (Step 4: Set Up Cache Warming on WordPress \(Using a Plugin\)) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 765.89 Tm (If your site runs on WordPress, the easiest way to enable warmup cache requests is through a) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 750.89 Tm (caching plugin that has built-in cache preloading. Here's how to do it with the most common options:) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 722.89 Tm (Using WP Rocket) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 700.89 Tm (1. Go to Settings -> WP Rocket in your WordPress dashboard.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 684.09 Tm (2. Click the Preload tab.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 667.29 Tm (3. Enable Activate Preloading .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 650.49 Tm (4. Turn on Preload Links to warm linked pages automatically.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 633.69 Tm (5. Save changes. WP Rocket will now crawl and preload your cache after every purge.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 610.89 Tm (Using LiteSpeed Cache) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 588.89 Tm (1. Go to LiteSpeed Cache -> Crawler in your dashboard.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 572.09 Tm (2. Set Crawler to ON .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 555.29 Tm (3. Set a crawl interval \(every 24 hours works for most sites\).) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 538.49 Tm (4. Under General Settings , enable Run With Curl .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 521.69 Tm (5. Save and let the crawler handle warmup automatically after cache clears.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 498.89 Tm (Using W3 Total Cache) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 476.89 Tm (1. Go to Performance -> General Settings .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 460.09 Tm (2. Enable Page Cache if not already on.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 443.29 Tm (3. Navigate to Performance -> Page Cache settings .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 426.49 Tm (4. Enable Preload the page cache .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 409.69 Tm (5. Set your sitemap URL so W3TC knows which pages to warm.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 392.89 Tm (6. Save all settings.) Tj ET BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 370.09 Tm (Step 5: Trigger a Manual Warmup Right After Deployment) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 346.09 Tm (Plugin-based preloading runs on a schedule, but if you've just pushed a deployment and cleared your) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 331.09 Tm (cache manually, you need an instant warmup. Here's how to trigger one right away:) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 309.09 Tm (- WP Rocket: Go to the WP Rocket dashboard and click Preload Cache manually from the top bar.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 292.29 Tm (- LiteSpeed Cache: Go to LiteSpeed Cache -> Manage -> Crawl and hit Start Crawling Now .) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 275.49 Tm (- Cloudflare \(if using\): Use the Cloudflare Cache Rules or a warmup script via their API to hit edge nodes) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 261.69 Tm (after any purge.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 244.89 Tm (- Manual method: Open your sitemap \(yoursite.com/sitemap.xml\), copy your top 20-30 URLs, and visit each) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 231.09 Tm (one from an incognito window right after deployment. Basic, but it works.) Tj ET BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 208.29 Tm (Step 6: Confirm Your Cache Is Actually Warm) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 184.29 Tm (Once you've set up warmup, you should verify it's working. Here's how to check without any paid) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 169.29 Tm (tools:) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 147.29 Tm (- Open your homepage in a new incognito window and check how fast it loads - it should feel instant.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 130.49 Tm (- Use PageSpeed Insights and look at your Time to First Byte \(TTFB\) . A warm cache should give you under) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 116.69 Tm (200ms, ideally under 100ms.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 99.89 Tm (- Check your caching plugin's log or dashboard - most show a cache hit/miss ratio. Aim for above 85%.) Tj ET BT /F1 10.5 Tf 0.2 0.23 0.28 rg 1 0 0 1 46 83.09 Tm (- Use WebPageTest and run a test right after deployment. If TTFB is low, your warmup is working.) Tj ET q 0.86 0.88 0.92 RG 1 w 46 42 m 549.28 42 l S Q BT /F1 8.4 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 30 Tm (TechRounder | Page 2 of 3) Tj ET BT /F1 7.2 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 19 Tm (https://www.techrounder.com/pdf/blog/that-slow-first-load-after-deployment-a-warmup-cache-request-is-the-fix-youre-missing.pdf) Tj ET endstream endobj 9 0 obj << /Type /Page /Parent 2 0 R /MediaBox [0 0 595.28 841.89] /Resources << /Font << /F1 3 0 R /F2 4 0 R >> >> /Contents 10 0 R >> endobj 10 0 obj << /Length 1471 >> stream BT /F2 15 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 789.89 Tm (The First Visitor Shouldn't Be the One Who Tests Your Cache) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 765.89 Tm (A warmup cache request isn't a complex infrastructure project - it's a simple, one-time setup that) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 750.89 Tm (runs quietly in the background every time your cache clears. Whether you use WP Rocket, LiteSpeed) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 735.89 Tm (Cache, or even a manual incognito crawl, the goal is the same: make sure no real visitor ever lands on) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 720.89 Tm (a cold server. Set it up once, trigger it after every deployment, and your site stays fast for everyone -) Tj ET BT /F1 11 Tf 0.14 0.16 0.2 rg 1 0 0 1 46 705.89 Tm (including the very first person who clicks through.) Tj ET BT /F2 13 Tf 0.08 0.1 0.14 rg 1 0 0 1 46 677.89 Tm (References) Tj ET BT /F1 10 Tf 0.18 0.2 0.24 rg 1 0 0 1 46 657.89 Tm (1. pagespeed.web.dev - https://pagespeed.web.dev) Tj ET BT /F1 10 Tf 0.18 0.2 0.24 rg 1 0 0 1 46 640.39 Tm (2. webpagetest.org - https://www.webpagetest.org) Tj ET q 0.86 0.88 0.92 RG 1 w 46 42 m 549.28 42 l S Q BT /F1 8.4 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 30 Tm (TechRounder | Page 3 of 3) Tj ET BT /F1 7.2 Tf 0.42 0.45 0.5 rg 1 0 0 1 46 19 Tm (https://www.techrounder.com/pdf/blog/that-slow-first-load-after-deployment-a-warmup-cache-request-is-the-fix-youre-missing.pdf) Tj ET endstream endobj xref 0 11 0000000000 65535 f 0000000015 00000 n 0000000064 00000 n 0000000133 00000 n 0000000203 00000 n 0000000278 00000 n 0000000420 00000 n 0000005768 00000 n 0000005910 00000 n 0000011033 00000 n 0000011176 00000 n trailer << /Size 11 /Root 1 0 R >> startxref 12699 %%EOF