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Report Summary

About Website

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KENTEH OPTICAL CO.,LTD.-Optical Components、Filters(Blue Glass)、Beam Splitters、Windows、Substrates、Optical Coating、Aspherical Lenses、Reflection Mirror、Lenses & Spotlight lens、Prism、IR and UV Lens、Cu...

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name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

16/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

24/100

25%

SI (Speed Index)

Value9.3 s

13/100

10%

TBT (Total Blocking Time)

Value1,520 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.602

10/100

15%

TTI (Time to Interactive)

Value10.4 s

24/100

10%

optical-lens-manufacturer.com

476 ms

www.optical-lens-manufacturer.com

1336 ms

bootstrap.min.css

902 ms

font-awesome.min.css

1703 ms

owl.carousel.css

1867 ms

Our browser made a total of 49 requests to load all elements on the main page. We found that 57% of them (28 requests) were addressed to the original Optical-lens-manufacturer.com, 12% (6 requests) were made to Rwd.gtut.com.tw and 8% (4 requests) were made to Goshop.gtut.com.tw. The less responsive or slowest element that took the longest time to load (3.4 sec) belongs to the original domain Optical-lens-manufacturer.com.

Content Size

569.4 kB

After Optimization

525.2 kB

In fact, the total size of Optical-lens-manufacturer.com main page is 569.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 297.5 kB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 31.2 kB

Original 36.7 kB
After minification 26.7 kB
After compression 5.4 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 10.0 kB, which is 27% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 31.2 kB or 85% of the original size.

Image Optimization

-0%

Potential reduce by 1.3 kB

Original 297.5 kB
After minification 296.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. OPTICAL Lens Manufacturer images are well optimized though.

JavaScript Optimization

-4%

Potential reduce by 7.0 kB

Original 182.5 kB
After minification 182.5 kB
After compression 175.5 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. This website has mostly compressed JavaScripts.

CSS Optimization

-9%

Potential reduce by 4.7 kB

Original 52.7 kB
After minification 52.7 kB
After compression 48.1 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Optical-lens-manufacturer.com has all CSS files already compressed.

Requests Now

After Optimization

The browser has sent 45 CSS, Javascripts, AJAX and image requests in order to completely render the main page of OPTICAL Lens Manufacturer. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 13 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Low

Detected JavaScript libraries

Search Engine Optimization Advices

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Optical-lens-manufacturer.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Optical-lens-manufacturer.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

optical-lens-manufacturer.com

Open Graph data is detected on the main page of OPTICAL Lens Manufacturer. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

Report Summary

Performance

Accessibility

Best Practices

SEO

"KENTEH OPTICAL CO.,LTD.-Optical Components、Filters(Blue Glass)、Beam Splitters、Windows、Substrates、Optical Coating、Aspherical Lenses、Reflection Mirror、...

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)