Tools & Wizards About Us

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 69

    Accessibility

    Visual factors better than
    that of 34% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

sc-glas.com

格纳斯

Page Load Speed

47.3 sec in total

First Response

3.8 sec

Resources Loaded

43.3 sec

Page Rendered

191 ms

About Website

Click here to check amazing Sc Glas content. Otherwise, check out these important facts you probably never knew about sc-glas.com

格纳斯股份有限公司（GLAS）成立于2000年10月，国家级高新技术企业，新三板挂牌上市公司。主要从事光学组件的二次压型、非球面光学灯具精密模压成型，眼视光学镜片及模具加工，光学镜片冷加工和光学镜头组装，现已成为国内较大型的光学配套生产企业。

Visit sc-glas.com

Key Findings

We analyzed Sc-glas.com page load time and found that the first response time was 3.8 sec and then it took 43.5 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster. Unfortunately, there were 18 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

sc-glas.com performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

36/100

10%

LCP (Largest Contentful Paint)

Value9.7 s

0/100

25%

SI (Speed Index)

Value30.4 s

0/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.764

5/100

15%

TTI (Time to Interactive)

Value7.9 s

44/100

10%

Network Requests Diagram

sc-glas.com

3817 ms

glide.css

5811 ms

style.css

3195 ms

responsive.css

4157 ms

jquery-1.7.2.js

20103 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that 90% of them (36 requests) were addressed to the original Sc-glas.com, 10% (4 requests) were made to V3.jiathis.com. The less responsive or slowest element that took the longest time to load (20.1 sec) belongs to the original domain Sc-glas.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 175.9 kB (74%)

Content Size

238.7 kB

After Optimization

62.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sc-glas.com main page is 238.7 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. 20% of websites need less resources to load. Javascripts take 101.4 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 17.4 kB

  • Original 21.6 kB
  • After minification 16.3 kB
  • After compression 4.2 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 5.3 kB, which is 24% 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 17.4 kB or 81% of the original size.

Image Optimization

-34%

Potential reduce by 8.3 kB

  • Original 24.4 kB
  • After minification 16.1 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. Obviously, Sc Glas needs image optimization as it can save up to 8.3 kB or 34% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-70%

Potential reduce by 71.5 kB

  • Original 101.4 kB
  • After minification 73.9 kB
  • After compression 30.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 71.5 kB or 70% of the original size.

CSS Optimization

-86%

Potential reduce by 78.7 kB

  • Original 91.3 kB
  • After minification 77.4 kB
  • After compression 12.6 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. Sc-glas.com needs all CSS files to be minified and compressed as it can save up to 78.7 kB or 86% of the original size.

Requests Breakdown

Number of requests can be reduced by 13 (62%)

Requests Now

21

After Optimization

8

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 21 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sc Glas. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

sc-glas.com accessibility score

69

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

sc-glas.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

sc-glas.com SEO score

92

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

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/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sc-glas.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Sc-glas.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

Open Graph description is not detected on the main page of Sc Glas. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: