# It’s Time for Shift-Left Performance Testing ![rw-book-cover](https://readwise-assets.s3.amazonaws.com/static/images/article3.5c705a01b476.png) URL:: https://go.forrester.com/blogs/its-time-for-shift-left-performance-testing/ Author:: Diego Lo Giudice ## Highlights > Amazon’s Prime Day 2018 glitch, when it couldn’t handle traffic loads, could have cost the giant up to $72 million, and Mobify has determined that every 100-millisecond decrease in home-page load speed contributed to nearly $380,000 in increased annual revenue. ([View Highlight](https://instapaper.com/read/1387099675/15634472)) > will take on new responsibilities (see figure). > Know That You’ll ([View Highlight](https://instapaper.com/read/1387099675/15634477)) --- Title: It’s Time for Shift-Left Performance Testing Author: Diego Lo Giudice Tags: readwise, articles date: 2024-01-30 --- # It’s Time for Shift-Left Performance Testing ![rw-book-cover](https://readwise-assets.s3.amazonaws.com/static/images/article3.5c705a01b476.png) URL:: https://go.forrester.com/blogs/its-time-for-shift-left-performance-testing/ Author:: Diego Lo Giudice ## AI-Generated Summary None ## Highlights > Amazon’s Prime Day 2018 glitch, when it couldn’t handle traffic loads, could have cost the giant up to $72 million, and Mobify has determined that every 100-millisecond decrease in home-page load speed contributed to nearly $380,000 in increased annual revenue. ([View Highlight](https://instapaper.com/read/1387099675/15634472)) > will take on new responsibilities (see figure). > Know That You’ll ([View Highlight](https://instapaper.com/read/1387099675/15634477))