Tools & Wizards About Us

Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

thorlabschina.cn

Thorlabs, Inc. - Your Source for Fiber Optics, Laser Diodes, Optical Instrumentation and Polarization Measurement & Control

Page Load Speed

6.6 sec in total

First Response

673 ms

Resources Loaded

5.9 sec

Page Rendered

72 ms

About Website

Welcome to thorlabschina.cn homepage info - get ready to check Thorlabs China best content for China right away, or after learning these important things about thorlabschina.cn

Thorlabs specializes in the building blocks for laser and fiber optic systems. From optomechanical components to telecom test instrumentation, Thorlabs' extensive manufacturing capabilities allow us t...

Visit thorlabschina.cn

Key Findings

We analyzed Thorlabschina.cn page load time and found that the first response time was 673 ms and then it took 5.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

thorlabschina.cn performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.9 s

1/100

10%

LCP (Largest Contentful Paint)

Value7.3 s

5/100

25%

SI (Speed Index)

Value10.2 s

9/100

10%

TBT (Total Blocking Time)

Value720 ms

41/100

30%

CLS (Cumulative Layout Shift)

Value0.003

100/100

15%

TTI (Time to Interactive)

Value15.9 s

6/100

10%

Network Requests Diagram

thorlabschina.cn

673 ms

www.thorlabschina.cn

1628 ms

fontawesome.js

867 ms

solid.js

1944 ms

headerfooter.min.css

1559 ms

Our browser made a total of 59 requests to load all elements on the main page. We found that 75% of them (44 requests) were addressed to the original Thorlabschina.cn, 8% (5 requests) were made to Lpcdn.lpsnmedia.net and 3% (2 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (2 sec) belongs to the original domain Thorlabschina.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.5 MB (63%)

Content Size

2.4 MB

After Optimization

870.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Thorlabschina.cn main page is 2.4 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 35% of websites need less resources to load. Javascripts take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 34.5 kB

  • Original 44.1 kB
  • After minification 44.0 kB
  • After compression 9.7 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. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 34.5 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 3.0 kB

  • Original 68.0 kB
  • After minification 65.0 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. Thorlabs China images are well optimized though.

JavaScript Optimization

-59%

Potential reduce by 1.1 MB

  • Original 1.8 MB
  • After minification 1.8 MB
  • After compression 743.2 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 1.1 MB or 59% of the original size.

CSS Optimization

-88%

Potential reduce by 390.4 kB

  • Original 443.2 kB
  • After minification 270.5 kB
  • After compression 52.9 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. Thorlabschina.cn needs all CSS files to be minified and compressed as it can save up to 390.4 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (59%)

Requests Now

54

After Optimization

22

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Thorlabs China. 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 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

thorlabschina.cn accessibility score

91

Accessibility Issues

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

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

thorlabschina.cn best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

High

Missing source maps for large first-party JavaScript

SEO Factors

thorlabschina.cn SEO score

85

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Thorlabschina.cn can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Thorlabschina.cn 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 data is detected on the main page of Thorlabs China. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: