Insert DNS prefetch links

Benefits

Reduce DNS lookup time by pre-resolving at the browser.

DNS resolution time varies from <1ms for locally cached results, to hundreds of milliseconds due to the cascading nature of DNS. This can contribute significantly towards total page load time. This filter reduces DNS lookup time by providing hints to the browser at the beginning of the HTML, which allows the browser to pre-resolve DNS for resources on the page.

Configuration

Enable pagespeed EnableFilters insert_dns_prefetch
Disable pagespeed DisableFilters insert_dns_prefetch

Risk Classification

Minimal

Example

soon available