Understanding Total Blocking Time's Importance for Performance Measurement and Optimization
In the world of web development and user experience, every second counts. Users expect fast and responsive websites and even minor delays can lead to frustration and lost customers. This is where "Total Blocking Time" ( TBT ) comes into play. In this guide, we'll explore what Total Blocking Time is, why it's crucial for performance measurement, and how to optimize it for a better user experience. What is Total Blocking Time (TBT)? Total Blocking Time is an essential web performance metric that measures the time during page load when the main thread is blocked and unable to respond to user input. The main thread is responsible for executing JavaScript and rendering the page, and any activity that consumes the main thread can cause blocking and hinder website responsiveness. Total Blocking Time is measured in milliseconds and is a key component of the larger performance metric called "First Input Delay" (FID). FID represents the time delay between a user'