centralcomputer.com website review

About 1.7 MB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 4.8 s faster on a phone.

12 files block the first paint until they finish downloading. Deferring or inlining them could save about 2.5 s.

278 KiB could be saved by minifying JavaScript.

About 169 KiB of CSS is downloaded but never applied on this page. Google estimates it would make the page about 1.5 s faster on a phone.

20 files are served with short cache lifetimes, so returning visitors download them again (393 KiB).

Your mobile performance score is 43 (desktop: 34). Under 50 is Google's “poor” band: many phone visitors leave before the page is usable.

A phone's processor spends 7.5 s on main-thread work while loading, 4.9 s of it running JavaScript. Above 2 s, taps and scrolls feel sluggish.

The page has 5,366 HTML elements. Above 1,500, rendering and every interaction get slower on phones.

61 images could be 4.4 MB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 750 ms faster on a phone.

8 third-party services load with your homepage (Google CDN, Facebook and Google Tag Manager and others), adding 2.4 MB and 1.3 s of main-thread time.

Google CDN costs a phone 425 ms of main-thread work and 1.5 MB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

Google Tag Manager costs a phone 150 ms of main-thread work and 361 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

Polyfills for old browsers add 56 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 250 ms faster on a phone.

20 long tasks block the main thread while loading, the longest for 197 ms. During a long task the page ignores taps.

11 KiB JavaScript is shipped twice across bundles. Google estimates it would make the page about 50 ms faster on a phone.

Web fonts hide text while they load. Setting font-display: swap shows text immediately (about 50 ms).

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

Real Chrome users on phones do not pass Google's Core Web Vitals on this page (28-day field data from the Chrome UX Report (opens in a new tab)). Google uses this in ranking.

Your largest element takes 41.9 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image “nvidia_rtx_spark_preorder”.

Visually, the page fills in at 18.7 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 59.2 s. Good is under 3.8 s.

The first text or image appears after 5.4 s on a phone. Good is under 1.8 s.

For real visitors the layout shifts by 0.16 (75th percentile). Good is under 0.1.

Real visitors wait 842 ms for your server to start answering (75th percentile). Good is under 800 ms.

Scripts block taps and scrolling for 379 ms in total while the page loads. Good is under 200 ms.

The layout shifts by 0.11 while loading, so content jumps under the reader's thumb. Good is under 0.1.

12 images have no width and height attributes, so the layout jumps as each one loads.

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' tap response (inp) went from 121 ms to 138 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-17, real Chrome visitors' largest content (lcp) went from 2.3 s to 2.2 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 14.3 MB in 526 requests on a phone: images 7.9 MB (109), scripts 4.5 MB (326) and other files 1.1 MB (63). Under 2 MB keeps phones on slow connections fast.

2 images weigh 1.3 MB together. On a phone connection a single image that size takes seconds.

12 images are downloaded at several times the size a phone draws them, for example web_banner_rtx_spark_shop_now.jpg at 2,459 px wide, shown at 390 px. Resized copies would save about 1.0 MB.

40 images (6.3 MB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

6 images further down the page (730 KiB) download before anyone scrolls to them. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 4.05 g of CO₂e: 486.4 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Certain ARIA roles must contain particular children: 1 element on the page fails this check, rated critical by axe-core.

Interactive controls must not be nested: 3 elements on the page fail this check, rated serious by axe-core.

ARIA dialog and alertdialog nodes should have an accessible name: 1 element on the page fails this check, rated serious by axe-core.

Some lists contain elements other than list items, which screen readers announce wrongly.

6 images have no alt text, which hurts accessibility and image search.

All page content should be contained by landmarks: 3 elements on the page fail this check, rated moderate by axe-core.

6 form fields have no label, so screen readers announce an empty box and autofill guesses.

2 visible links have no text or label, so screen readers cannot say where they go.

1 tap target is too small or too close together to hit reliably with a finger.

Alternative text of images should not be repeated as text: 1 element on the page fails this check, rated minor by axe-core.

Your meta description is 165 characters; Google truncates after about 160, so the end of your pitch is cut.

No Open Graph image, so links shared on LinkedIn, Slack or Facebook show no preview picture.

4 links have no real href, so search engines can't follow them.

1 link use generic text like “click here” or “learn more”, which tells Google nothing about the page behind it.

The homepage links to 1,371 pages on centralcomputer.com and 10 external pages.

There is no /llms.txt, a short Markdown guide to your key pages for AI tools (llmstxt.org). It is optional and few AI tools read it yet, so treat it as a cheap extra.

/all-products.html and /all-products/cables.html took over 3 s to send their HTML from our server.

We fetched 15 pages linked from your homepage (of 196 found) and read each the way a search engine does.

1 error was logged to the browser console while the page loaded, for example “Failed to load resource: the server responded with a status of 404 ()”.

8 images are displayed at the wrong aspect ratio, so they look stretched or squashed.

Large scripts ship without source maps.

2 images are served at too low a resolution for sharp phone screens.

No Content-Security-Policy header, the main browser-side defence against injected scripts.

No Referrer-Policy header, so full URLs can leak to the sites you link to.

No Permissions-Policy header to switch off camera, microphone and location for embedded content.

X-XSS-Protection is set to “1; mode=block”; the header is deprecated and can introduce bugs. Use 0 or remove it.

There is no /.well-known/security.txt telling researchers how to report a security problem to you.

centralcomputer.com has no CAA record, so any certificate authority may issue a certificate for it. A CAA record naming your provider (for example letsencrypt.org) closes that door.

centralcomputer.com's DNS answers are not signed. DNSSEC stops attackers forging them to send visitors or email elsewhere; most registrars switch it on in a click, though most sites still run without it.

On a phone, there is no call to action on the first screen: visitors have to scroll to find out what to do next.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

A local customer looking to call finds no phone number on the homepage. Add one, ideally as a tap-to-call link.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

The homepage has only about 154 words of visible text; thin pages give Google and first-time buyers little to go on.

The homepage shows no opening hours. If customers visit or call, show when.

There is no link to Google or Apple Maps. A directions link is one tap for a phone visitor.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

Email authentication: SPF record 25 points, plus 15 when it ends in -all (10 for ~all); DMARC record 25, plus 25 for a reject policy (15 for quarantine); a DKIM key on a common selector 10.

Before a visitor clicks anything, the page loads Google Ads, Google Analytics, Google Tag Manager, Hotjar and Klaviyo and 4 mores (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 25 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 39 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.