6.5 sec in total
701 ms
5.3 sec
427 ms
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.comWe analyzed Rainbow-optical.com page load time and found that the first response time was 701 ms and then it took 5.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.
rainbow-optical.com performance score
name
value
score
weighting
Value4.2 s
19/100
10%
Value6.2 s
11/100
25%
Value6.9 s
34/100
10%
Value0 ms
100/100
30%
Value0.409
24/100
15%
Value4.2 s
85/100
10%
701 ms
880 ms
906 ms
145 ms
254 ms
Our browser made a total of 58 requests to load all elements on the main page. We found that 97% of them (56 requests) were addressed to the original Rainbow-optical.com, 2% (1 request) were made to Fonts.googleapis.com and 2% (1 request) were made to Idinfo.zjaic.gov.cn. The less responsive or slowest element that took the longest time to load (2.4 sec) belongs to the original domain Rainbow-optical.com.
Page size can be reduced by 149.2 kB (4%)
3.7 MB
3.6 MB
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. 40% of websites need less resources to load. Images take 3.6 MB which makes up the majority of the site volume.
Potential reduce by 13.6 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.
Potential reduce by 109.3 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. Rainbow Optical images are well optimized though.
Potential reduce by 21.9 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 21.9 kB or 23% of the original size.
Potential reduce by 4.4 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.
Number of requests can be reduced by 8 (15%)
53
45
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.
rainbow-optical.com
701 ms
www.rainbow-optical.com
880 ms
www.rainbow-optical.com
906 ms
style.css
145 ms
swiper.min.css
254 ms
quick-view.css
196 ms
css
31 ms
jquery-1.8.3.min.js
335 ms
swiper.min.js
399 ms
ScrollPicLeft.js
196 ms
jquery.quick-view.js
214 ms
zd-video.js
263 ms
py.js
262 ms
login.do
91 ms
tel.png
76 ms
email.png
73 ms
fdj.png
72 ms
logo.jpg
68 ms
5a0ea568a96db.jpg
133 ms
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135 ms
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141 ms
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142 ms
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204 ms
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212 ms
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873 ms
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201 ms
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1089 ms
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465 ms
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269 ms
likeon.jpg
270 ms
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828 ms
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734 ms
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732 ms
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665 ms
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797 ms
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931 ms
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807 ms
more.jpg
865 ms
5f3cebbfd3eed.jpg
1193 ms
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1032 ms
share01.png
931 ms
share02.png
938 ms
share03.png
998 ms
share04.png
998 ms
share05.png
1004 ms
share06.png
1064 ms
banner01.jpg
1508 ms
banner02.jpg
2436 ms
banner03.jpg
2310 ms
contactBg.jpg
1144 ms
BRANDON_MED.OTF
1964 ms
index.php
1190 ms
arrowRight.png
1191 ms
big-play.svg
1264 ms
play.svg
1207 ms
pause.svg
1271 ms
volume.svg
1266 ms
fullscreen.svg
1330 ms
rainbow-optical.com accessibility score
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
<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.
Definition list items are not wrapped in <dl> elements
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
<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
Image elements do not have [alt] attributes
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
rainbow-optical.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
rainbow-optical.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
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
Document uses legible font sizes
EN
N/A
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.
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: