The article highlights the impact of latency on web page loading times, especially when resources are fetched from external servers. By illustrating the delay caused by geographic distance and the nature of HTTPS connections, it emphasizes the benefits of hosting files like CSS, JavaScript, and images directly on one's own server or CDN. This approach can notably decrease loading times and improve speed index scores in performance evaluations like Google's PageSpeed Insights. Efforts such as pre-downloading larger files from a CDN can lead to significant improvements in overall site performance.
The links below are traveling around the world (figuratively speaking), meaning that they automatically take longer time to load. If you download the files from a CDN or similar to your server and serve them directly, it may be a lot faster.
The latency traveling via HTTPS is normally way slower compared to loading from your own server. This applies to all files downloaded from the internet outside your server, including fonts, CSS, JavaScript, and images.
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