Tools & Wizards About Us

Report Summary

  • 49

    Performance

    Renders faster than
    67% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

oceanoptics.cn

光纤光谱仪_海洋光学官网-ocean optics

Page Load Speed

5.8 sec in total

First Response

725 ms

Resources Loaded

4.2 sec

Page Rendered

953 ms

About Website

Click here to check amazing Ocean Optics content for China. Otherwise, check out these important facts you probably never knew about oceanoptics.cn

海洋光学是微型光纤光谱仪的发明者,产品及服务包括光纤光谱仪,光谱系统,工业集成,软件,附件等,为您提供快速、专业、便捷的光谱在线解决方案

Visit oceanoptics.cn

Key Findings

We analyzed Oceanoptics.cn page load time and found that the first response time was 725 ms and then it took 5.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

oceanoptics.cn performance score

49

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value4.2 s

45/100

25%

SI (Speed Index)

Value11.6 s

4/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.054

98/100

15%

TTI (Time to Interactive)

Value22.7 s

1/100

10%

Network Requests Diagram

www.oceaninsight.cn

725 ms

styles.css

61 ms

find.js

41 ms

preload.js

41 ms

gallery.js

162 ms

Our browser made a total of 46 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Oceanoptics.cn, 11% (5 requests) were made to Fonts.gstatic.com and 4% (2 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (1.5 sec) relates to the external source Goutong.baidu.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 423.8 kB (12%)

Content Size

3.4 MB

After Optimization

3.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Oceanoptics.cn main page is 3.4 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 2.7 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 116.0 kB

  • Original 149.8 kB
  • After minification 117.0 kB
  • After compression 33.8 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. This page needs HTML code to be minified as it can gain 32.8 kB, which is 22% 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 116.0 kB or 77% of the original size.

Image Optimization

-5%

Potential reduce by 128.6 kB

  • Original 2.7 MB
  • After minification 2.5 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. Ocean Optics images are well optimized though.

JavaScript Optimization

-29%

Potential reduce by 147.9 kB

  • Original 518.2 kB
  • After minification 518.2 kB
  • After compression 370.3 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 147.9 kB or 29% of the original size.

CSS Optimization

-38%

Potential reduce by 31.3 kB

  • Original 81.5 kB
  • After minification 81.5 kB
  • After compression 50.2 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. Oceanoptics.cn needs all CSS files to be minified and compressed as it can save up to 31.3 kB or 38% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (36%)

Requests Now

39

After Optimization

25

  • Images
  • JavaScript
  • CSS

The browser has sent 39 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Ocean Optics. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

oceanoptics.cn accessibility score

68

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

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

High

Links do not have a discernible name

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

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

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

Best Practices

oceanoptics.cn 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

oceanoptics.cn SEO score

90

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

robots.txt is not valid

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

    ZH

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Oceanoptics.cn can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Oceanoptics.cn 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

Open Graph description is not detected on the main page of Ocean Optics. 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: