Celebcrunch Traffic, Page Speed and Technology Analysis

A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow).

A long cache lifetime can speed up repeat visits to your page.

Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption.

Large network payloads cost users real money and are highly correlated with long load times.

Serve images that are appropriately-sized to save cellular data and improve load time.

Optimized images load faster and consume less cellular data.

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this.

Speed Index shows how quickly the contents of a page are visibly populated.

First Meaningful Paint measures when the primary content of a page is visible.

First Contentful Paint marks the time at which the first text or image is painted.

Time to interactive is the amount of time it takes for the page to become fully interactive.

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this.

Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive.

Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity.