Tools & Wizards About Us
opticians.asda.com screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 86

    SEO

    Google-friendlier than
    60% of websites

opticians.asda.com

Homepage - welcome to ASDA

Page Load Speed

1.2 sec in total

First Response

218 ms

Resources Loaded

627 ms

Page Rendered

340 ms

opticians.asda.com screenshot

About Website

Click here to check amazing Opticians ASDA content for United Kingdom. Otherwise, check out these important facts you probably never knew about opticians.asda.com

Visit opticians.asda.com

Key Findings

We analyzed Opticians.asda.com page load time and found that the first response time was 218 ms and then it took 967 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

opticians.asda.com performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.3 s

40/100

10%

LCP (Largest Contentful Paint)

Value11.3 s

0/100

25%

SI (Speed Index)

Value13.9 s

1/100

10%

TBT (Total Blocking Time)

Value8,740 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.033

100/100

15%

TTI (Time to Interactive)

Value23.1 s

1/100

10%

Network Requests Diagram

opticians.asda.com

218 ms

gtm.js

83 ms

6c2d311b044c2c6f.css

210 ms

polyfills-c67a75d1b6f99dc8.js

193 ms

4952.89b9223be2209ae6.js

157 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that 39% of them (14 requests) were addressed to the original Opticians.asda.com, 58% (21 requests) were made to Cdn.builder.io and 3% (1 request) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (426 ms) belongs to the original domain Opticians.asda.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 893.6 kB (52%)

Content Size

1.7 MB

After Optimization

828.0 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Opticians.asda.com main page is 1.7 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. 50% of websites need less resources to load. HTML takes 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 822.2 kB

  • Original 1.0 MB
  • After minification 1.0 MB
  • After compression 195.3 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 822.2 kB or 81% of the original size.

Image Optimization

-1%

Potential reduce by 3.7 kB

  • Original 270.9 kB
  • After minification 267.1 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. Opticians ASDA images are well optimized though.

JavaScript Optimization

-16%

Potential reduce by 67.6 kB

  • Original 432.6 kB
  • After minification 432.6 kB
  • After compression 365.0 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 67.6 kB or 16% of the original size.

CSS Optimization

-17%

Potential reduce by 95 B

  • Original 574 B
  • After minification 574 B
  • After compression 479 B

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. Opticians.asda.com needs all CSS files to be minified and compressed as it can save up to 95 B or 17% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (34%)

Requests Now

35

After Optimization

23

  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opticians ASDA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

opticians.asda.com

opticians.asda.com

218 ms

gtm.js

gtm.js

83 ms

6c2d311b044c2c6f.css

6c2d311b044c2c6f.css

210 ms

polyfills-c67a75d1b6f99dc8.js

polyfills-c67a75d1b6f99dc8.js

193 ms

4952.89b9223be2209ae6.js

4952.89b9223be2209ae6.js

157 ms

5380.966458ce83613c2b.js

5380.966458ce83613c2b.js

174 ms

366.5dcaf27521bd4095.js

366.5dcaf27521bd4095.js

181 ms

4920.8637a6eaa965b97f.js

4920.8637a6eaa965b97f.js

157 ms

webpack-3c612fa653bc00a0.js

webpack-3c612fa653bc00a0.js

276 ms

framework-ce84985cd166733a.js

framework-ce84985cd166733a.js

328 ms

main-91c78cf305f854e9.js

main-91c78cf305f854e9.js

277 ms

_app-1ae4aa195bab55f2.js

_app-1ae4aa195bab55f2.js

426 ms

index-7f8a5370c999dcae.js

index-7f8a5370c999dcae.js

312 ms

_buildManifest.js

_buildManifest.js

356 ms

_ssgManifest.js

_ssgManifest.js

315 ms

pixel

pixel

143 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F4486bb7822e34e9bb6abd66f21874626

assets%2F2796f8d773224b1aa96d85d0257880a8%2F4486bb7822e34e9bb6abd66f21874626

140 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2Fb27913b8b8f94473839d9316c73ce71d

assets%2F2796f8d773224b1aa96d85d0257880a8%2Fb27913b8b8f94473839d9316c73ce71d

142 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F5d77bb8eb36e4db3980ce3fec725a0d5

assets%2F2796f8d773224b1aa96d85d0257880a8%2F5d77bb8eb36e4db3980ce3fec725a0d5

373 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2Fb218cd00960b48d99a337caaedc16bea

assets%2F2796f8d773224b1aa96d85d0257880a8%2Fb218cd00960b48d99a337caaedc16bea

154 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F7202330ea9564e2b817d42fbe2e07913

assets%2F2796f8d773224b1aa96d85d0257880a8%2F7202330ea9564e2b817d42fbe2e07913

149 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2Fa356f234840440f2a62471fdafbee74f

assets%2F2796f8d773224b1aa96d85d0257880a8%2Fa356f234840440f2a62471fdafbee74f

136 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F4199065e963949c9b2178821999038e6

assets%2F2796f8d773224b1aa96d85d0257880a8%2F4199065e963949c9b2178821999038e6

150 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F4fd5cb820d1b47ed89b4dc99c14a376c

assets%2F2796f8d773224b1aa96d85d0257880a8%2F4fd5cb820d1b47ed89b4dc99c14a376c

142 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F0c79dd8d3cf443a0bb5e5c4ff1586d6f

assets%2F2796f8d773224b1aa96d85d0257880a8%2F0c79dd8d3cf443a0bb5e5c4ff1586d6f

146 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2Ff3884714b80d4e3f926e4ff7c67aec93

assets%2F2796f8d773224b1aa96d85d0257880a8%2Ff3884714b80d4e3f926e4ff7c67aec93

154 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F8401fc3df53949508720f477f20ecc21

assets%2F2796f8d773224b1aa96d85d0257880a8%2F8401fc3df53949508720f477f20ecc21

351 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F104fd3fd4a2444b0b7119146d0df2521

assets%2F2796f8d773224b1aa96d85d0257880a8%2F104fd3fd4a2444b0b7119146d0df2521

157 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F097931936b4b4a0daebb34a55a154573

assets%2F2796f8d773224b1aa96d85d0257880a8%2F097931936b4b4a0daebb34a55a154573

328 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F9d0d6f3a0bea4803af3b0cd329c7d294

assets%2F2796f8d773224b1aa96d85d0257880a8%2F9d0d6f3a0bea4803af3b0cd329c7d294

158 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F584ffc388a7b4e5b8c135669fe96caeb

assets%2F2796f8d773224b1aa96d85d0257880a8%2F584ffc388a7b4e5b8c135669fe96caeb

157 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F979337847de341a8a7918891d4a6b1a4

assets%2F2796f8d773224b1aa96d85d0257880a8%2F979337847de341a8a7918891d4a6b1a4

161 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F632496312d89431192d53d0b0738f83a

assets%2F2796f8d773224b1aa96d85d0257880a8%2F632496312d89431192d53d0b0738f83a

162 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F430f56818c5144dc9fbfbfc0c270468c

assets%2F2796f8d773224b1aa96d85d0257880a8%2F430f56818c5144dc9fbfbfc0c270468c

158 ms

assets%2F2796f8d773224b1aa96d85d0257880a8%2F59c741bf3a1149489237f4aab82be0cc

assets%2F2796f8d773224b1aa96d85d0257880a8%2F59c741bf3a1149489237f4aab82be0cc

144 ms

assets%2Fb7a54edd952a4f8a89a2bae9a44d009b%2F19c83f267b9e4f28ae2ebf163d15bc9a

assets%2Fb7a54edd952a4f8a89a2bae9a44d009b%2F19c83f267b9e4f28ae2ebf163d15bc9a

146 ms

Accessibility Review

opticians.asda.com accessibility score

93

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

Buttons do not have an accessible name

Best Practices

opticians.asda.com 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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

opticians.asda.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

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 Opticians.asda.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 Opticians.asda.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

opticians.asda.com

Open Graph description is not detected on the main page of Opticians ASDA. 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: