The latest articles on DEV Community by Rajat Sinha (@rajatsinhamonk). https://dev.to/rajatsinhamonk https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F2896826%2Fb17991fc-969c-4e50-9d15-2512dccf6959.png https://dev.to/rajatsinhamonk en Rajat Sinha Mon, 24 Feb 2025 17:32:29 +0000 https://dev.to/rajatsinhamonk/preconnect-vs-dns-prefetch-resource-hints-for-page-speed-mhm https://dev.to/rajatsinhamonk/preconnect-vs-dns-prefetch-resource-hints-for-page-speed-mhm <p>Using <code>dns-prefetch</code> prompts the browser to look up a domain's IP address ahead of time, so it’s ready when resources from that domain need to be downloaded. </p> <p>Meanwhile, <code>preconnect</code> directs the browser to establish a connection to a given origin before any resources from that origin are requested. </p> <p>By proactively connecting to important third-party domains, you can shave off 100–500 milliseconds of load time. </p> <p>Although these savings might appear minor, they can meaningfully enhance the user experience.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fqav2urph6ovaz6plln6b.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fqav2urph6ovaz6plln6b.png" alt="preconnect vs dns prefetch - ThePetNest" width="800" height="528"></a></p> <p>Because <code>dns-prefetch</code> has slightly different browser support than <code>preconnect</code>, it can act as a fallback in environments where <code>preconnect</code> isn't yet supported.</p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4djxe1n4e27xfdxbvimb.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2F4djxe1n4e27xfdxbvimb.png" alt="preconnect vs dns prefetch(Page Speed) - ThePetNest" width="800" height="469"></a></p> <p><strong>Preconnect Browser Support</strong></p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fg416c48t5r26ac0igttf.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fg416c48t5r26ac0igttf.png" alt="Preconnect - ThePetNest" width="800" height="176"></a></p> <p><strong>Prefetch Browser Support</strong></p> <p><a href="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fomrys4zcn25foy6iulgn.png" class="article-body-image-wrapper"><img src="https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fomrys4zcn25foy6iulgn.png" alt="Prefetch - ThePetNest" width="800" height="166"></a></p> <blockquote> <p>Feel free to checkout the implementation on <a href="https://thepetnest.com/" rel="noopener noreferrer">ThePetNest</a></p> </blockquote>