hscpoly.com website review

About 655 KiB of JavaScript is downloaded but never used on this page. Google estimates it would make the page about 5.8 s faster on a phone.

36 files are served with short cache lifetimes, so returning visitors download them again (204 KiB).

8 third-party services load with your homepage (YouTube, Google Tag Manager and Cookie-Script.com and others), adding 2.2 MB and 924 ms of main-thread time.

Your mobile performance score is 50. Pages that score under 90 lose visitors before the first paint.

2 images could be 101 KiB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 650 ms faster on a phone.

15 files block the first paint until they finish downloading. Deferring or inlining them could save about 750 ms.

YouTube costs a phone 534 ms of main-thread work and 1.7 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 294 ms of main-thread work and 342 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.

9 long tasks block the main thread while loading, the longest for 213 ms. During a long task the page ignores taps.

About 64 KiB of CSS is downloaded but never applied on this page.

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

Polyfills for old browsers add 17 KiB JavaScript that modern phones do not need.

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

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.

Real visitors wait 1.8 s for your server to start answering (75th percentile). Good is under 800 ms.

The first text or image appears after 11.8 s on a phone. Good is under 1.8 s.

Your largest element takes 17.4 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the text “WE CREATE THE WORLD’S PUREST HUMAN-MADE SUBSTANCE: POLYSILI…”.

Visually, the page fills in at 11.8 s (Speed Index). Good is under 3.4 s.

The page becomes fully interactive after 17.7 s. Good is under 3.8 s.

Real visitors see the first content after 2.3 s (75th percentile). Good is under 1.8 s.

Scripts block taps and scrolling for 268 ms in total while the page loads. Good is under 200 ms.

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' tap response (inp) went from 87 ms to 96 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Over the last 25 four-week periods to 2026-10-24, real Chrome visitors' largest content (lcp) went from 2.1 s to 2.4 s at the 75th percentile (Chrome UX Report (opens in a new tab) history).

Your homepage downloads 2.7 MB in 67 requests on a phone: scripts 1.9 MB (29), images 324 KiB (9) and HTML 174 KiB (3). Under 2 MB keeps phones on slow connections fast.

1 image further down the page (99 KiB) download before anyone scrolls to it. Adding loading="lazy" lets the first screen load first.

By the Sustainable Web Design model, a visit to your homepage emits about 0.75 g of CO₂e: 90.2 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

Elements must only use permitted ARIA attributes: 4 elements on the page fail this check, rated serious by axe-core.

1 image has no alt text, which hurts accessibility and image search.

1 visible link has no text or label, so screen readers cannot say where it goes.

Headings should not be empty: 1 element on the page fails this check, rated minor by axe-core.

No meta description, so Google writes its own snippet from whatever text it finds.

Your title is only 28 characters: “Home - Hemlock Semiconductor”. Between 30 and 65 characters leaves room to say what you do and for whom.

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

The homepage links to 77 pages on hscpoly.com and 13 external pages.

Your Organization JSON-LD is missing sameAs (social profiles), description and contact details. These are the facts AI assistants use to describe a business and to tell it apart from others with a similar name.

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.

/markets-technologies/solar, /markets-technologies/electronics, /markets-technologies/technologies, /sustainability/sustainability-report, /sustainability/community-alert-preparedness and /about/executive-leadership/arabinda-ab-ghosh and 4 others have no meta description, so Google writes the search snippet from whatever text it finds.

We fetched 15 pages linked from your homepage (of 39 found) and read each the way a search engine does.

7 of 12 tappable elements near the top of the page are smaller than 24 px, hard to hit with a thumb.

5 third-party cookies are set on load; browsers are restricting these, so whatever relies on them breaks.

Chrome logged issues while loading the page (“Cookie”).

No Strict-Transport-Security header, so browsers may still try plain http first on a return visit.

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.

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

hscpoly.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.

hscpoly.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.

Your homepage shows a street address but no LocalBusiness JSON-LD, so Google and AI assistants have to guess your address, hours and phone from the page text.

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 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.

The homepage carries about 371 words of visible text.

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 and Google Tag Manager (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 6 cookies, 1 of them by other companies (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 14 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.