Faster Websites with WebPageTest
summary
Free open source WebPageTest measures why pages are slow not just that they are, using worldwide agents that run up to nine timed runs (self‑hosted agents scale to ~50) and produce filmstrip/video, overlaid waterfalls and a speed‑index comparison that proves an optimized staging site renders seconds earlier. Features demoed include the WebPageTest API (API keys get ~200 requests/day), scripted interactions, custom metrics injected as JSON in an HTML comment, and localhost testing via ngrok tunneling; results integrate into CI to fail builds on regressions.
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chapters (42)
- 0:00Introduction
- 1:38What is WebPageTest
- 3:15Performance Testing
- 6:02History of WebPageTest
- 6:54WebPageTest flaws
- 11:13How WebPageTest works
- 13:49Basic test criteria
- 14:56Choosing a URL
- 16:36Location latency
- 17:25Browser
- 18:14Test Count
- 20:52Test Results
- 21:42Quantitative Metrics
- 23:33Performance Review
- 24:28Test History
- 25:30Network Waterfall Chart
- 26:25Comparison Bar Chart
- 27:13Spot Tab
- 29:18Twitter
- 30:14Advanced Usage
- 30:49Custom Metrics
- 33:41Custom Metric
- 34:02Custom Metric Example
- 35:20Automated Scripting
- 37:34Script Example
- 38:42Security
- 44:43WebPageTest Service
- 45:22Parameters
- 45:39API Key
- 46:05URL
- 46:27Jason
- 46:37Status Code
- 47:54Grunt Task
- 48:20Grunt Task Failed
- 48:34Test Result
- 49:16WebPageTest Bolt protester
- 50:13WebPageTest Settings
- 50:38WebPageTest Scenarios
- 51:16WebPageTest Agents
- 52:14Copy URLs
- 52:29Test Scenario
- 55:25Wrap Up
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