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Testing Effects Of DNS Prefetch (rel=dns-prefetch)

By Arun Basil Lal — on January 10, 2018 — No Comments ↓

Understanding what DNS-Prefetch is: Developer.Mozilla.org

To make it happen, add this in the <head>

<link rel="dns-prefetch" href="https://www.example.com">

Test it with: WebPageTest.org

Results of DNS-Prefetch

The blue part of the load time is the DNS resolution time.

No Dns Prefetch

No DNS Prefetch

With Dns Prefetch

With DNS Prefetch

To see the real effect, test it from a rare different location. Here is a test from Nebraska. As you can see in the screenshot below, the DNS resolution took quite a while and starting early, thanks to DNS-Prefetch saved precious load time.

Effect Of Dns Prefetch

The Real Effect of DNS Prefetch

Hello, I am Arun Basil Lal. Thank you for reading!

I am a WordPress product developer and creator of Image Attributes Pro. I am passionate about solving problems and travelling the world.

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