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op5u.com screenshot

Report Summary

  • 61

    Performance

    Renders faster than
    76% of other websites

  • 51

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 54

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 92

    SEO

    Google-friendlier than
    75% of websites

op5u.com

文档列表-第1页-知了文库-专业教育类文档资料库

Page Load Speed

43.4 sec in total

First Response

7.9 sec

Resources Loaded

35.2 sec

Page Rendered

283 ms

op5u.com screenshot

About Website

Welcome to op5u.com homepage info - get ready to check Op 5 U best content right away, or after learning these important things about op5u.com

让知识没有边界,知了文库是专业教育类在线文档分享平台。你可以上传设计图纸,研究报告,设计标准,策划管理方案,论文，复习题、模拟题答案等电子文档，分享最新的学习资料。

Visit op5u.com

Key Findings

We analyzed Op5u.com page load time and found that the first response time was 7.9 sec and then it took 35.5 sec to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Performance Metrics

op5u.com performance score

61

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

18/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

21/100

25%

SI (Speed Index)

Value9.3 s

13/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value5.2 s

75/100

10%

Network Requests Diagram

op5u.com

7877 ms

style_1_common.css

7394 ms

style_1_forum_index.css

6925 ms

style.css

7100 ms

common.js

10419 ms

Our browser made a total of 39 requests to load all elements on the main page. We found that 90% of them (35 requests) were addressed to the original Op5u.com, 5% (2 requests) were made to Hm.baidu.com and 3% (1 request) were made to Discuz.gtimg.cn. The less responsive or slowest element that took the longest time to load (17.3 sec) belongs to the original domain Op5u.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 166.1 kB (60%)

Content Size

278.3 kB

After Optimization

112.2 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Op5u.com main page is 278.3 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 15% of websites need less resources to load. Javascripts take 165.3 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 48.9 kB

  • Original 60.7 kB
  • After minification 59.2 kB
  • After compression 11.8 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. 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 48.9 kB or 81% of the original size.

Image Optimization

-9%

Potential reduce by 4.9 kB

  • Original 52.3 kB
  • After minification 47.3 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. Op 5 U images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 112.3 kB

  • Original 165.3 kB
  • After minification 157.9 kB
  • After compression 53.0 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 112.3 kB or 68% of the original size.

Requests Breakdown

Number of requests can be reduced by 19 (50%)

Requests Now

38

After Optimization

19

  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Op 5 U. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

op5u.com

op5u.com

7877 ms

style_1_common.css

style_1_common.css

7394 ms

style_1_forum_index.css

style_1_forum_index.css

6925 ms

style.css

style.css

7100 ms

common.js

common.js

10419 ms

forum.js

forum.js

7104 ms

logging.js

logging.js

7423 ms

md5.js

md5.js

7724 ms

common.css

common.css

7201 ms

jquery.js

jquery.js

10049 ms

ukasky_livecontact.js

ukasky_livecontact.js

7362 ms

discuz_tips.js

discuz_tips.js

535 ms

bgimg.jpg

bgimg.jpg

2860 ms

logo.png

logo.png

3574 ms

qq_login.gif

qq_login.gif

2884 ms

wechat_login.png

wechat_login.png

530 ms

list_7ree.gif

list_7ree.gif

577 ms

collapsed_no.gif

collapsed_no.gif

586 ms

forum.gif

forum.gif

969 ms

2.gif

2.gif

2228 ms

collapsed_yes.gif

collapsed_yes.gif

1068 ms

site_qq.jpg

site_qq.jpg

2926 ms

px.png

px.png

2313 ms

newarow.gif

newarow.gif

2824 ms

pn.png

pn.png

2835 ms

nv.png

nv.png

4531 ms

qmenu.png

qmenu.png

3410 ms

nv_a.png

nv_a.png

3251 ms

search.png

search.png

5454 ms

search.png

search.png

3407 ms

pt_item.png

pt_item.png

3653 ms

chart.png

chart.png

3783 ms

titlebg.png

titlebg.png

3803 ms

float_s.png

float_s.png

17324 ms

float_bg.gif

float_bg.gif

4007 ms

h.js

h.js

1173 ms

21.gif

21.gif

1182 ms

hm.gif

hm.gif

345 ms

scrolltop.png

scrolltop.png

2928 ms

Accessibility Review

op5u.com accessibility score

51

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

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

op5u.com best practices score

54

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

High

Registers an unload listener

Low

Detected JavaScript libraries

High

Issues were logged in the Issues panel in Chrome Devtools

SEO Factors

op5u.com SEO score

92

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

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

    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 Op5u.com 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 Op5u.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

op5u.com

Open Graph description is not detected on the main page of Op 5 U. 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: