9/5/2025
“Tight” Mode: Why Browsers Show Different Performance Results
We know browsers do all sorts of things under the hood. One of those things is how they not only fetch resources, such as images and scripts, from the server, but also how they prioritize those resources. Chrome and Safari have implemented “Tight” mode, which limits which resources are loaded and in what order, but each browser handles it drastically differently. Since there is very little information about “Tight” mode, this article attempts to explain at a high level what it is, what triggers it, and how it is treated differently across major browsers.