A single meta tag to control prefetching reduced Pinkbike DNS queries by 350 million per month. The same implementation on a larger site, deviantART, reduced authoritative DNS queries by 10 billion per month. DNS Basics DNS resolution is the process of converting a domain/hostname to an IP address required to access the resource. This process requires a certain time and adds to the perceived page
![DNS Prefetching Implications - Pinkbike](https://cdn-ak-scissors.b.st-hatena.com/image/square/2fc1d7ccd4a3d946cbc64092645f06b28380fd39/height=288;version=1;width=512/https%3A%2F%2Fep1.pinkbike.org%2Fp4pb6275284%2Fp4pb6275284.jpg)