DNS Prefetching Implications. deviantart use a subdomain per user, which meant the DNS prefetching feature in Firefox and Chrome was costing them an extra 10 billion DNS queries per month. Disabling it with a meta tag saves them $1600/month in DNS service charges.
Recent articles
- Highlights from my appearance on the Data Renegades podcast with CL Kao and Dori Wilson - 26th November 2025
- Claude Opus 4.5, and why evaluating new LLMs is increasingly difficult - 24th November 2025
- sqlite-utils 4.0a1 has several (minor) backwards incompatible changes - 24th November 2025