Client-side rendering of HTML and interactivity
As mentioned earlier, the browser handles HTML from the server in a very performant way by default. It will break up parsing and rendering of HTML in a way that avoids long tasks, and optimizes the amount of total main thread time. This leads to a lower Total Blocking Time (TBT), and TBT is strongly correlated with INP.
Source: Client-side rendering of HTML and interactivity - web.dev