Debugging a Slow Online Store: From Core Web Vitals to Backend Code

Stop guessing why your online store is running slow. Instead of walking through slides full of theory, we take a real customer shop and investigate what is actually happening under the hood when performance drops. In this video, we cover a full end-to-end performance investigation: 01. Spotting the Change in Real-User Data We start with Core Web Vitals using RUMvision to identify exactly where real-user frontend performance took a hit in the browser. 02. Diving into Backend Traces We move into Tideways to analyze PHP performance, follow requests deeper into the application, and inspect backend execution. 03. Connecting the Dots We bring both perspectives together to see whether slow database queries, heavy backend processing, or something else explains what real users are experiencing. Chapters: 0:00 Intro & Waiting for Attendees 3:54 Who Are RUMvision & Tideways? 11:09 The Dutch Label Shop Case Study 12:54 Core Web Vitals: Before Optimization 15:44 Optimization Results 17:58 Why CrUX / PageSpeed Insights Falls Short 20:24 Real-Time Monitoring with RUMvision 22:27 Tideways Backend Performance Analysis 27:24 Root Cause: Yotpo Reviews API 29:18 AI-Assisted Performance Fix 32:20 Validating Real User Impact 35:19 RUMvision MCP: Fixing CLS 39:56 The Value of AI in Performance Optimization 41:37 Wrap-up & Special Offer One shop. Two perspectives. By pairing RUMvision's frontend Real User Monitoring (RUM) with Tideways' backend profiling, you get a complete, full-stack view of application performance. If you found this real-world breakdown useful, don't forget to like, subscribe, and leave any questions in the comments below! #WebPerformance #CoreWebVitals #PHP #Tideways #RUMvision #WebDev #eCommerce