Unoptimised images
This is cause number one. A 4 MB photo displayed at 400 pixels wide downloads ten times more data than needed. On a mobile plan with weak coverage, the wait becomes unbearable.
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Visitors arrive, wait, and leave before seeing anything.
Bounce rate measures the share of visitors who leave without a single interaction. A high rate is almost never a content problem: it is usually a delay problem. According to data published by Google, more than half of mobile visitors abandon a page that takes over three seconds to appear. The content can be excellent — nobody saw it.
This is cause number one. A 4 MB photo displayed at 400 pixels wide downloads ten times more data than needed. On a mobile plan with weak coverage, the wait becomes unbearable.
Every added tool — analytics, live chat, ad pixel, consent banner — blocks rendering a little more. Stacked up, five "lightweight" scripts delay the page by several seconds.
A shared server hosting hundreds of other sites responds slowly at peak hours, precisely when your traffic is highest.
Slowness is paid for twice. Once in visitors lost before the first impression. Again in search ranking: since performance signals count toward position, a slow site is structurally disadvantaged against a fast competitor with equivalent content. And if you buy traffic, you pay for every visitor who leaves.
of mobile visitors leave after 3s of waiting
more conversions on a fast site, at equal traffic
of the ad spend wasted on a visitor who bounces
Image compression and resizing, lazy loading for anything off screen, caching. Those three actions alone often bring a page under the two-second mark.
We list every script, its cost in milliseconds and what it actually returns. The ones no longer earning their place go; the rest load after rendering.
If the problem persists we revisit the architecture: server-side rendering, hosting closer to visitors, optimised database queries.
The full answer
Revenue-driven web performanceWe measure your real load times, page by page, and hand back the fix list ranked by payoff — from the most profitable to the most marginal.
Request a speed diagnosticThe other symptoms