Tools & Wizards About Us
rainbow-optical.com screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 41

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

rainbow-optical.com

Wenzhou Rainbow Optical

Page Load Speed

4.2 sec in total

First Response

638 ms

Resources Loaded

3.2 sec

Page Rendered

339 ms

rainbow-optical.com screenshot

About Website

Visit rainbow-optical.com now to see the best up-to-date Rainbow Optical content and also check out these interesting facts you probably never knew about rainbow-optical.com

Wenzhou Rainbow Optical

Visit rainbow-optical.com

Key Findings

We analyzed Rainbow-optical.com page load time and found that the first response time was 638 ms and then it took 3.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

rainbow-optical.com performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value7.2 s

5/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.389

26/100

15%

TTI (Time to Interactive)

Value4.2 s

85/100

10%

Network Requests Diagram

rainbow-optical.com

638 ms

www.rainbow-optical.com

845 ms

www.rainbow-optical.com

520 ms

style.css

73 ms

swiper.min.css

140 ms

Our browser made a total of 60 requests to load all elements on the main page. We found that 93% of them (56 requests) were addressed to the original Rainbow-optical.com, 3% (2 requests) were made to Fonts.gstatic.com and 2% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (845 ms) belongs to the original domain Rainbow-optical.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 148.9 kB (4%)

Content Size

3.7 MB

After Optimization

3.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Rainbow-optical.com main page is 3.7 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. 45% of websites need less resources to load. Images take 3.6 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 13.6 kB

  • Original 16.8 kB
  • After minification 13.7 kB
  • After compression 3.1 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 3.1 kB, which is 19% 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 13.6 kB or 81% of the original size.

Image Optimization

-3%

Potential reduce by 109.3 kB

  • Original 3.6 MB
  • After minification 3.5 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. Rainbow Optical images are well optimized though.

JavaScript Optimization

-23%

Potential reduce by 21.6 kB

  • Original 93.1 kB
  • After minification 93.1 kB
  • After compression 71.5 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 21.6 kB or 23% of the original size.

CSS Optimization

-33%

Potential reduce by 4.4 kB

  • Original 13.4 kB
  • After minification 13.4 kB
  • After compression 9.0 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. Rainbow-optical.com needs all CSS files to be minified and compressed as it can save up to 4.4 kB or 33% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (15%)

Requests Now

53

After Optimization

45

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rainbow Optical. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

rainbow-optical.com

rainbow-optical.com

638 ms

www.rainbow-optical.com

www.rainbow-optical.com

845 ms

www.rainbow-optical.com

www.rainbow-optical.com

520 ms

style.css

style.css

73 ms

swiper.min.css

swiper.min.css

140 ms

quick-view.css

quick-view.css

212 ms

css

css

31 ms

jquery-1.8.3.min.js

jquery-1.8.3.min.js

277 ms

swiper.min.js

swiper.min.js

350 ms

ScrollPicLeft.js

ScrollPicLeft.js

211 ms

jquery.quick-view.js

jquery.quick-view.js

212 ms

zd-video.js

zd-video.js

207 ms

py.js

py.js

289 ms

login.do

login.do

230 ms

tel.png

tel.png

79 ms

email.png

email.png

81 ms

fdj.png

fdj.png

81 ms

logo.jpg

logo.jpg

82 ms

5a0ea568a96db.jpg

5a0ea568a96db.jpg

139 ms

5a0ea61f5ef24.jpg

5a0ea61f5ef24.jpg

145 ms

5a0ea63e4905c.jpg

5a0ea63e4905c.jpg

201 ms

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5a0ea65e0244d.jpg

213 ms

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5a0ea671340cf.jpg

148 ms

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5a0ea691c4a2a.jpg

148 ms

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5a307aa59480b.jpg

206 ms

5a307ad89ba40.jpg

5a307ad89ba40.jpg

212 ms

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5a307abe80eb5.jpg

215 ms

5a307b317bca8.jpg

5a307b317bca8.jpg

216 ms

5a307b5a1bb07.jpg

5a307b5a1bb07.jpg

269 ms

likeon.jpg

likeon.jpg

274 ms

5a0eabca9b772.jpg

5a0eabca9b772.jpg

411 ms

5a1f7fe19cab4.jpg

5a1f7fe19cab4.jpg

487 ms

5a1f7fe7be16a.jpg

5a1f7fe7be16a.jpg

447 ms

5a0eac7ceafbc.jpg

5a0eac7ceafbc.jpg

444 ms

5a0eac9f27d33.jpg

5a0eac9f27d33.jpg

478 ms

5a0eacb3a143e.jpg

5a0eacb3a143e.jpg

479 ms

5a0eacc7d019e.jpg

5a0eacc7d019e.jpg

478 ms

more.jpg

more.jpg

513 ms

5f3cebbfd3eed.jpg

5f3cebbfd3eed.jpg

517 ms

5b57e25b17221.jpg

5b57e25b17221.jpg

551 ms

share01.png

share01.png

546 ms

share02.png

share02.png

551 ms

share03.png

share03.png

553 ms

share04.png

share04.png

579 ms

share05.png

share05.png

587 ms

share06.png

share06.png

613 ms

6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkP8o58a-xA.woff

6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkP8o58a-xA.woff

90 ms

6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkBgv58a-xA.woff

6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkBgv58a-xA.woff

112 ms

banner01.jpg

banner01.jpg

662 ms

banner02.jpg

banner02.jpg

677 ms

banner03.jpg

banner03.jpg

730 ms

contactBg.jpg

contactBg.jpg

680 ms

BRANDON_MED.OTF

BRANDON_MED.OTF

676 ms

index.php

index.php

660 ms

arrowRight.png

arrowRight.png

680 ms

big-play.svg

big-play.svg

695 ms

play.svg

play.svg

655 ms

pause.svg

pause.svg

664 ms

volume.svg

volume.svg

674 ms

fullscreen.svg

fullscreen.svg

676 ms

Accessibility Review

rainbow-optical.com accessibility score

41

Accessibility Issues

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

High

Definition list items are not wrapped in <dl> elements

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

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

rainbow-optical.com best practices score

75

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

Page has valid source maps

SEO Factors

rainbow-optical.com SEO score

75

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

High

Image elements do not have [alt] attributes

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rainbow-optical.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 Rainbow-optical.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

rainbow-optical.com

Open Graph description is not detected on the main page of Rainbow Optical. 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: