Tools & Wizards About Us
oceanoptics.cn screenshot

Report Summary

  • 43

    Performance

    Renders faster than
    62% of other websites

  • 87

    Accessibility

    Visual factors better than
    that of 67% of websites

  • 50

    Best Practices

    More advanced features
    available than in
    18% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

oceanoptics.cn

光纤光谱仪_海洋光学官网-ocean optics

Page Load Speed

6.6 sec in total

First Response

794 ms

Resources Loaded

5.7 sec

Page Rendered

180 ms

oceanoptics.cn screenshot

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 794 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.

Performance Metrics

oceanoptics.cn performance score

43

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.0 s

24/100

10%

LCP (Largest Contentful Paint)

Value5.9 s

14/100

25%

SI (Speed Index)

Value15.9 s

0/100

10%

TBT (Total Blocking Time)

Value380 ms

70/100

30%

CLS (Cumulative Layout Shift)

Value0.022

100/100

15%

TTI (Time to Interactive)

Value14.5 s

8/100

10%

Network Requests Diagram

oceanoptics.cn

794 ms

www.oceanoptics.cn

937 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

385 ms

css_QnDqumlAmBiA-LkPKOOEj-wMlRQlYuHQdMmPGFs03GQ.css

403 ms

css_cYMybnDP4t46XkQbvDL7oPXUf5cvuksKrDyOaxHejss.css

405 ms

Our browser made a total of 83 requests to load all elements on the main page. We found that 92% of them (76 requests) were addressed to the original Oceanoptics.cn, 2% (2 requests) were made to Google-analytics.com and 2% (2 requests) were made to Hm.baidu.com. The less responsive or slowest element that took the longest time to load (2.5 sec) belongs to the original domain Oceanoptics.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 397.9 kB (19%)

Content Size

2.1 MB

After Optimization

1.7 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Oceanoptics.cn main page is 2.1 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. Images take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 54.8 kB

  • Original 69.5 kB
  • After minification 65.6 kB
  • After compression 14.7 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 54.8 kB or 79% of the original size.

Image Optimization

-16%

Potential reduce by 291.6 kB

  • Original 1.8 MB
  • After minification 1.6 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. Obviously, Ocean Optics needs image optimization as it can save up to 291.6 kB or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-37%

Potential reduce by 51.3 kB

  • Original 139.1 kB
  • After minification 139.1 kB
  • After compression 87.8 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 51.3 kB or 37% of the original size.

CSS Optimization

-1%

Potential reduce by 253 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.7 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 has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 19 (24%)

Requests Now

80

After Optimization

61

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 80 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 9 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

oceanoptics.cn

oceanoptics.cn

794 ms

www.oceanoptics.cn

www.oceanoptics.cn

937 ms

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

css_xE-rWrJf-fncB6ztZfd2huxqgxu4WO-qwma6Xer30m4.css

385 ms

css_QnDqumlAmBiA-LkPKOOEj-wMlRQlYuHQdMmPGFs03GQ.css

css_QnDqumlAmBiA-LkPKOOEj-wMlRQlYuHQdMmPGFs03GQ.css

403 ms

css_cYMybnDP4t46XkQbvDL7oPXUf5cvuksKrDyOaxHejss.css

css_cYMybnDP4t46XkQbvDL7oPXUf5cvuksKrDyOaxHejss.css

405 ms

css_2DFMrDjXdUf8JA3OVmMltBEZWkM8Vve4V9ql_joSknk.css

css_2DFMrDjXdUf8JA3OVmMltBEZWkM8Vve4V9ql_joSknk.css

414 ms

css_Q7PMVZ5tCEPz7fSt-Eyy9K2yZrJ54FvOxEzIZywGkPo.css

css_Q7PMVZ5tCEPz7fSt-Eyy9K2yZrJ54FvOxEzIZywGkPo.css

423 ms

js_Xjzh1hVfcgVAixhmmB6Go8TUMPOiprA-2vkC-oWXARQ.js

js_Xjzh1hVfcgVAixhmmB6Go8TUMPOiprA-2vkC-oWXARQ.js

701 ms

js_74fQilcaAEV2wv1zVZD0feo2QNTuKMiirHd_qlIDwvE.js

js_74fQilcaAEV2wv1zVZD0feo2QNTuKMiirHd_qlIDwvE.js

767 ms

js_mr8EmJ5hK2Ex_2TT4iXf7d4MSvAqeaj_2LO9lDjQr60.js

js_mr8EmJ5hK2Ex_2TT4iXf7d4MSvAqeaj_2LO9lDjQr60.js

603 ms

js_AwMbwbh-hzRyWo_-cEerj9dmIzODj8CK_s4L3rbpQiE.js

js_AwMbwbh-hzRyWo_-cEerj9dmIzODj8CK_s4L3rbpQiE.js

603 ms

js_aivqjMHAF7aLb_678PjLKmyKdMK0gdD6GLyDkYlny38.js

js_aivqjMHAF7aLb_678PjLKmyKdMK0gdD6GLyDkYlny38.js

829 ms

analytics.js

analytics.js

5 ms

collect

collect

27 ms

page-top-bg.png

page-top-bg.png

234 ms

search-form-bg.png

search-form-bg.png

193 ms

search-button-bg.png

search-button-bg.png

214 ms

page-top-cut-off.png

page-top-cut-off.png

214 ms

timg.jfif

timg.jfif

203 ms

youku-icon.png

youku-icon.png

211 ms

edm.jpg

edm.jpg

574 ms

hai_yang_new-logozhong_ying_wen_ban_small.jpg

hai_yang_new-logozhong_ying_wen_ban_small.jpg

404 ms

main-menu-bg.png

main-menu-bg.png

430 ms

main-menu-round-left.png

main-menu-round-left.png

416 ms

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main-menu-round-right.png

429 ms

main-menu-active-bg.png

main-menu-active-bg.png

467 ms

main-menu-cut-off.png

main-menu-cut-off.png

603 ms

shadow-top-slider.jpg

shadow-top-slider.jpg

816 ms

jiu_guan_wang_banner.png

jiu_guan_wang_banner.png

1875 ms

ocean_stshang_xin_1.png

ocean_stshang_xin_1.png

1887 ms

sr2tou_tu_.png

sr2tou_tu_.png

1406 ms

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cu_xiao_jie_shu_hou_de_banner.png

1350 ms

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bu_huo_.jpg

802 ms

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hrs-5a.png

1004 ms

feng_mian_.jpg

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1017 ms

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1206 ms

ocean_st.jpg

ocean_st.jpg

1219 ms

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1407 ms

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1428 ms

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1540 ms

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1630 ms

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1805 ms

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1621 ms

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1732 ms

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1822 ms

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1871 ms

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1924 ms

logo.png

logo.png

2006 ms

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2025 ms

h.js

h.js

564 ms

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2053 ms

neofox-.jpg

neofox-.jpg

1891 ms

maya.jpg

maya.jpg

1897 ms

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1913 ms

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qe65_pro.jpg

2000 ms

hr4000-.jpg

hr4000-.jpg

2018 ms

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2057 ms

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1906 ms

-.jpg

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1927 ms

nirquest-.jpg

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1886 ms

usb4000-.jpg

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1983 ms

xi_guang_du_.jpg

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1966 ms

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1925 ms

most.jpg

most.jpg

2541 ms

21.gif

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1709 ms

b.js

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1122 ms

hm.gif

hm.gif

1017 ms

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1703 ms

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1761 ms

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1607 ms

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1614 ms

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1497 ms

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1478 ms

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1461 ms

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1405 ms

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1425 ms

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1460 ms

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1369 ms

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1421 ms

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1379 ms

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1299 ms

pc_nb.js

pc_nb.js

1514 ms

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products-button-up.png

1274 ms

Accessibility Review

oceanoptics.cn accessibility score

87

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.

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

oceanoptics.cn best practices score

50

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

Displays images with incorrect aspect ratio

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

oceanoptics.cn SEO score

69

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

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    ZH

  • Language Claimed

    ZH

  • 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 it matches the claimed language. 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

oceanoptics.cn

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: