JavaScript the page downloads but never uses Lighthouse: Reduce unused JavaScript · Est savings of 774 KiB · could save about 3.4 s
Returning visitors re-download files that could be kept Lighthouse: Use efficient cache lifetimes · Est savings of 659 KiB · could save about 2.5 s
Files that stop the page from drawing until they finish loading Lighthouse: Eliminate render-blocking resources · Est savings of 1,780 ms · could save about 1.8 s
What it costs
Google calls 2.5 s or less good for the main content. duluthtrading.com is 11.4 s past that on a mid-range phone.
Speed is money: in Deloitte's 2020 study Milliseconds Make Millions (37 brands, 30 million sessions), making a site just 0.1 s faster on phones went with 8.4% more orders for retail sites and 10.1% for travel sites. Most slow pages come down to one or two root causes.
Want it fixed?
We find the root cause across the browser, the network and the server, fix it,
and prove it with a before-and-after test. Start with a Diagnosis: a written root cause and a fix plan.