Fred.
Well-known member
DNS prefetching allows the browser to perform DNS lookups on a page in the background while the user is browsing. This minimizes latency as the DNS lookup has already taken place once the user clicks on a link. DNS prefetching can be added to a specific URL by adding the rel="dns-prefetch" tag to the link attribute.
“DNS requests are very small in terms of bandwidth, but latency can be quite high, especially on mobile networks. By speculatively prefetching DNS results, latency can be reduced significantly at certain times, such as when the user clicks the link. In some cases, latency can be reduced by a second. – Mozilla Developer Network“
“DNS requests are very small in terms of bandwidth, but latency can be quite high, especially on mobile networks. By speculatively prefetching DNS results, latency can be reduced significantly at certain times, such as when the user clicks the link. In some cases, latency can be reduced by a second. – Mozilla Developer Network“
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