Tool · Web tool

WebPageTest

WebPageTest · WebPageTest (Catchpoint) Freemium Intermediate

This runs your site on real devices from real locations at set connection speeds, including Slow 3G, so you get an honest picture rather than a guess from your fast office wifi. It shows exactly which bytes and requests are hurting your load, and lets you test a repeat visit to check your caching. The closest you get to your user's experience without flying to their city.

  • Test on a real device at a defined slow connection speed
  • The waterfall shows precisely what is slowing the first load
  • A second cached run reveals whether repeat visits are actually fast
Open on webpagetest.org ↗

The question it answers

  1. How do I design for users in India who are on cheap Android phones and slow, patchy internet?

Read with it

  1. This is Google's own field research on building for people coming online in markets like India, and it names the exact... Google Design Article · ~12 min read Connectivity, Culture, and Credit: Designing for the Next Billion Users Google Design (Next Billion Users team)
  2. You cannot fix what you never feel, and most of us build on fast laptops and office wifi. This is the official doc for... Chrome for Developers Tool · Reference doc, ~10 min to try Throttling (Network and CPU) in Chrome DevTools Chrome DevTools team, Google
  3. Video · About 40 minutes Challenges and learnings of building for the next billion users (Google I/O '18) Google (Next Billion Users team: Nithya Sambasivan, Josh Woodward and colleagues)
  4. Images are the single biggest reason landing pages crawl on a slow 4G connection, and Squoosh fixes that in your browser with... Google Chrome Labs Tool · A few minutes per image Squoosh Google Chrome Labs
  5. Flipkart serves exactly your users, many on 2G in smaller Indian cities, and this case study shows a fast mobile web app... web.dev (Google) Article Flipkart triples time-on-site with a Progressive Web App web.dev (Google)
  6. A first hand engineering account of why Flipkart, an app first Indian company, rebuilt the mobile web to reach users on weak... Medium (Progressive Web Apps) Article Building Flipkart Lite: A Progressive Web App Aditya Punjani
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