Do not let your customers go for reasons other than the content 遅延が 10秒までになると、ユーザーがコンピューターに振り回されている気持ちになり、ストレ スを感じ始める。 10秒以上遅くなると、サイトからの離脱率が高くなる。 コンテンツ以外の要因で離脱されることを防ぐためにもパフォーマンスは重要です。 Why
initiative by Google to provide unified guidance for quality signals that are essential to delivering a great user experience on the web. Yes, Web Vitals LCP FID CLS
- Largest Contentful Paint Load the main content Fast! CLS - Cumulative Layout Shift Stop layout shifts! TBT - Total Blocking Time Make non-interactive time Short! TTI - Time to Interactive Become respondable to user input quickly!
that load pages in a simulated environment without a user cannot measure FID (there is no user input). We can improve FID by improving TBT. (ref: https://web.dev/fid/#how-to-improve-fid)
lighthouse on CI. https://github.com/GoogleChrome/lighthouse-ci Do Lighthouse Store Data to BigQuery Make Graph by Looker At 25:00 export result data data format is for our Looker graph visualize the performance