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crystalsigma.com screenshot

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

crystalsigma.com

London Air Conditioning Experts - Crystal Sigma

Page Load Speed

2.8 sec in total

First Response

207 ms

Resources Loaded

2 sec

Page Rendered

518 ms

crystalsigma.com screenshot

About Website

Welcome to crystalsigma.com homepage info - get ready to check Crystal Sigma best content right away, or after learning these important things about crystalsigma.com

Crystal Sigma is a leading London air conditioning specialist, we install, repair and maintain air conditioning systems from all major brands across the UK.

Visit crystalsigma.com

Key Findings

We analyzed Crystalsigma.com page load time and found that the first response time was 207 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 50% of websites can load faster.

Performance Metrics

crystalsigma.com performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value2.8 s

83/100

25%

SI (Speed Index)

Value3.0 s

93/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.134

80/100

15%

TTI (Time to Interactive)

Value9.3 s

32/100

10%

Network Requests Diagram

crystalsigma.com

207 ms

crystalsigma.com

355 ms

css2

44 ms

style.css

119 ms

fontawesome.min.css

180 ms

Our browser made a total of 71 requests to load all elements on the main page. We found that 85% of them (60 requests) were addressed to the original Crystalsigma.com, 4% (3 requests) were made to Fonts.gstatic.com and 3% (2 requests) were made to Google.com. The less responsive or slowest element that took the longest time to load (962 ms) belongs to the original domain Crystalsigma.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 50.1 kB (3%)

Content Size

1.6 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Crystalsigma.com main page is 1.6 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. 55% of websites need less resources to load. Images take 1.2 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 32.2 kB

  • Original 41.0 kB
  • After minification 37.9 kB
  • After compression 8.8 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 32.2 kB or 78% of the original size.

Image Optimization

-1%

Potential reduce by 14.3 kB

  • Original 1.2 MB
  • After minification 1.2 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. Crystal Sigma images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 1.7 kB

  • Original 330.5 kB
  • After minification 330.5 kB
  • After compression 328.8 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

-5%

Potential reduce by 2.0 kB

  • Original 43.0 kB
  • After minification 43.0 kB
  • After compression 41.1 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. Crystalsigma.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 17 (27%)

Requests Now

64

After Optimization

47

  • Images
  • JavaScript
  • CSS

The browser has sent 64 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Crystal Sigma. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

crystalsigma.com

crystalsigma.com

207 ms

crystalsigma.com

crystalsigma.com

355 ms

css2

css2

44 ms

style.css

style.css

119 ms

fontawesome.min.css

fontawesome.min.css

180 ms

solid.min.css

solid.min.css

252 ms

brands.min.css

brands.min.css

256 ms

r.css

r.css

258 ms

bootstrap.css

bootstrap.css

342 ms

api.js

api.js

51 ms

contact_common.js

contact_common.js

256 ms

hdr.js

hdr.js

263 ms

coverage.js

coverage.js

339 ms

js

js

116 ms

js

js

118 ms

jquery.min.js

jquery.min.js

440 ms

bootstrap.min.js

bootstrap.min.js

439 ms

contact_val.js

contact_val.js

438 ms

tp.widget.bootstrap.min.js

tp.widget.bootstrap.min.js

30 ms

recaptcha__en.js

recaptcha__en.js

27 ms

abc_service.png

abc_service.png

154 ms

abc_phone.png

abc_phone.png

154 ms

trust_pilot_.png

trust_pilot_.png

155 ms

abc_booking.png

abc_booking.png

154 ms

logo.png

logo.png

189 ms

slide1.jpg

slide1.jpg

184 ms

warranty_blue.png

warranty_blue.png

189 ms

slide2.jpg

slide2.jpg

342 ms

slide3.jpg

slide3.jpg

274 ms

slide4.jpg

slide4.jpg

348 ms

20yrs.jpg

20yrs.jpg

359 ms

sb_ac_1.jpg

sb_ac_1.jpg

280 ms

sb_1.png

sb_1.png

281 ms

sb_ac_2.jpg

sb_ac_2.jpg

357 ms

sb_2.png

sb_2.png

363 ms

sb_ac_3.jpg

sb_ac_3.jpg

377 ms

sb_3.png

sb_3.png

427 ms

c_img_1.jpg

c_img_1.jpg

516 ms

c_img_2.jpg

c_img_2.jpg

526 ms

cs_centerparcs.jpg

cs_centerparcs.jpg

445 ms

cs_hilton.jpg

cs_hilton.jpg

449 ms

cs_southgate.jpg

cs_southgate.jpg

467 ms

cs_oldwaroffice.jpg

cs_oldwaroffice.jpg

514 ms

sb_gg_1.jpg

sb_gg_1.jpg

530 ms

sb_gg_2.jpg

sb_gg_2.jpg

533 ms

sb_5.png

sb_5.png

555 ms

boiler_upgrade.jpg

boiler_upgrade.jpg

685 ms

daikin.jpg

daikin.jpg

601 ms

fujitsu.jpg

fujitsu.jpg

614 ms

mitsuelec.jpg

mitsuelec.jpg

614 ms

samsung.jpg

samsung.jpg

615 ms

toshiba.jpg

toshiba.jpg

642 ms

mitsuheavy.jpg

mitsuheavy.jpg

607 ms

cuse.png

cuse.png

624 ms

ftr_recc.jpg

ftr_recc.jpg

620 ms

57 ms

ftr_mcs.jpg

ftr_mcs.jpg

551 ms

ftr_gassafe.jpg

ftr_gassafe.jpg

579 ms

ftr_qms.jpg

ftr_qms.jpg

621 ms

ftr_trustmark.jpg

ftr_trustmark.jpg

625 ms

2sDfZG1Wl4Lcnbu6iUchZ0U.ttf

2sDfZG1Wl4Lcnbu6iUchZ0U.ttf

74 ms

2sDcZG1Wl4LcnbuCJW8Db2--C70.ttf

2sDcZG1Wl4LcnbuCJW8Db2--C70.ttf

104 ms

2sDcZG1Wl4LcnbuCNWgDb2--C70.ttf

2sDcZG1Wl4LcnbuCNWgDb2--C70.ttf

115 ms

fa-solid-900.ttf

fa-solid-900.ttf

962 ms

fa-brands-400.ttf

fa-brands-400.ttf

854 ms

ftr_chas.jpg

ftr_chas.jpg

603 ms

ftr_bes.jpg

ftr_bes.jpg

631 ms

19 ms

ftr_niceic.jpg

ftr_niceic.jpg

581 ms

ftr_safecontractor.jpg

ftr_safecontractor.jpg

584 ms

ftr_ssl.jpg

ftr_ssl.jpg

597 ms

Accessibility Review

crystalsigma.com accessibility score

96

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.

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

Links do not have a discernible name

Best Practices

crystalsigma.com best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

crystalsigma.com SEO score

86

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

Links do not have descriptive text

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

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 Crystalsigma.com 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 Crystalsigma.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

crystalsigma.com

Open Graph description is not detected on the main page of Crystal Sigma. 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: