Images below the fold loading before they're needed Lighthouse: Defer offscreen images · Est savings of 2,939 KiB · could save about 14.8 s
Files that stop the page from drawing until they finish loading Lighthouse: Eliminate render-blocking resources · Est savings of 6,220 ms · could save about 6.2 s
Images far bigger than a phone screen needs Lighthouse: Properly size images · Est savings of 1,331 KiB · could save about 3.5 s
What it costs
Google calls 2.5 s or less good for the main content. apple.com is more than 18 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.