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bt-laboratory.com screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

bt-laboratory.com

BT LAB

Page Load Speed

3 sec in total

First Response

46 ms

Resources Loaded

2.5 sec

Page Rendered

524 ms

bt-laboratory.com screenshot

About Website

Visit bt-laboratory.com now to see the best up-to-date BT LAB Oratory content and also check out these interesting facts you probably never knew about bt-laboratory.com

BT LAB

Visit bt-laboratory.com

Key Findings

We analyzed Bt-laboratory.com page load time and found that the first response time was 46 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.

Performance Metrics

bt-laboratory.com performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.7 s

30/100

10%

LCP (Largest Contentful Paint)

Value9.8 s

0/100

25%

SI (Speed Index)

Value8.0 s

22/100

10%

TBT (Total Blocking Time)

Value2,690 ms

4/100

30%

CLS (Cumulative Layout Shift)

Value0.09

92/100

15%

TTI (Time to Interactive)

Value18.6 s

3/100

10%

Network Requests Diagram

bt-laboratory.com

46 ms

bt-laboratory.com

310 ms

www.bt-laboratory.com

273 ms

swiper.min.css

26 ms

global.css

37 ms

Our browser made a total of 64 requests to load all elements on the main page. We found that 66% of them (42 requests) were addressed to the original Bt-laboratory.com, 13% (8 requests) were made to Cdn.bioz.com and 13% (8 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (1.7 sec) relates to the external source Salesiq.zoho.com.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 124.1 kB (6%)

Content Size

2.0 MB

After Optimization

1.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Bt-laboratory.com main page is 2.0 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. Only a small number of websites need less resources to load. Images take 1.5 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 52.5 kB

  • Original 62.6 kB
  • After minification 43.7 kB
  • After compression 10.1 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 19.0 kB, which is 30% 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 52.5 kB or 84% of the original size.

Image Optimization

-5%

Potential reduce by 69.2 kB

  • Original 1.5 MB
  • After minification 1.4 MB

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. BT LAB Oratory images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 247 B

  • Original 414.3 kB
  • After minification 414.3 kB
  • After compression 414.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-7%

Potential reduce by 2.1 kB

  • Original 30.8 kB
  • After minification 30.8 kB
  • After compression 28.8 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. Bt-laboratory.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 39 (67%)

Requests Now

58

After Optimization

19

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 58 CSS, Javascripts, AJAX and image requests in order to completely render the main page of BT LAB Oratory. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 24 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

bt-laboratory.com

bt-laboratory.com

46 ms

bt-laboratory.com

bt-laboratory.com

310 ms

www.bt-laboratory.com

www.bt-laboratory.com

273 ms

swiper.min.css

swiper.min.css

26 ms

global.css

global.css

37 ms

jquery.min.js

jquery.min.js

84 ms

swiper.min.js

swiper.min.js

45 ms

font-awesome.css

font-awesome.css

36 ms

jquery-2.2.4.js

jquery-2.2.4.js

133 ms

bioz-w-api-6.0.min.js

bioz-w-api-6.0.min.js

146 ms

font-awesome-reg.css

font-awesome-reg.css

145 ms

tooltipster.css

tooltipster.css

132 ms

tooltipster-theme2.css

tooltipster-theme2.css

145 ms

bioz-w-api-2.5.min.js

bioz-w-api-2.5.min.js

144 ms

v_widget-2.5.css

v_widget-2.5.css

112 ms

v_widget-2.5.shanghai_korain.js

v_widget-2.5.shanghai_korain.js

113 ms

tooltipster.js

tooltipster.js

148 ms

js

js

121 ms

js

js

316 ms

js

js

319 ms

adsbygoogle.js

adsbygoogle.js

120 ms

js

js

319 ms

js

js

320 ms

js

js

318 ms

vcd15cbe7772f49c399c6a5babf22c1241717689176015

vcd15cbe7772f49c399c6a5babf22c1241717689176015

118 ms

layer.js

layer.js

108 ms

vue.min.js

vue.min.js

107 ms

baige.js

baige.js

107 ms

bgui.js

bgui.js

117 ms

font-awesome-4.7.0.css

font-awesome-4.7.0.css

8 ms

gtm.js

gtm.js

313 ms

gtm.js

gtm.js

312 ms

down01.png

down01.png

149 ms

widget

widget

1652 ms

layer.css

layer.css

137 ms

user01.png

user01.png

152 ms

cart01.png

cart01.png

149 ms

logo.jpg

logo.jpg

150 ms

search01.png

search01.png

153 ms

logo.png

logo.png

152 ms

menu.png

menu.png

153 ms

jt-w01.png

jt-w01.png

289 ms

bg-dh02.png

bg-dh02.png

294 ms

bg-dh02-2.png

bg-dh02-2.png

422 ms

20240614.jpg

20240614.jpg

293 ms

1628674110.jpg

1628674110.jpg

296 ms

bg-pro01.jpg

bg-pro01.jpg

316 ms

cpimg01.jpg

cpimg01.jpg

294 ms

cpimg02.jpg

cpimg02.jpg

316 ms

cpimg03.jpg

cpimg03.jpg

317 ms

cpimg04_20240614.jpg

cpimg04_20240614.jpg

417 ms

cpimg05.jpg

cpimg05.jpg

419 ms

cpimg06.jpg

cpimg06.jpg

423 ms

bg-foot01.jpg

bg-foot01.jpg

418 ms

tuite01_index.png

tuite01_index.png

417 ms

facebook01_index.png

facebook01_index.png

419 ms

ins01_index.png

ins01_index.png

419 ms

gotop.png

gotop.png

420 ms

show_ads_impl.js

show_ads_impl.js

214 ms

Roboto-Regular.ttf

Roboto-Regular.ttf

384 ms

main.js

main.js

36 ms

zrt_lookup.html

zrt_lookup.html

48 ms

ads

ads

33 ms

bg-dh03-1111.png

bg-dh03-1111.png

133 ms

Accessibility Review

bt-laboratory.com accessibility score

70

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

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

Form elements do not have associated labels

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

bt-laboratory.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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

bt-laboratory.com SEO score

86

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

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

High

Tap targets are not sized appropriately

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 Bt-laboratory.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 Bt-laboratory.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

bt-laboratory.com

Open Graph description is not detected on the main page of BT LAB Oratory. 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: