Tools & Wizards About Us
o571.com screenshot

Report Summary

  • 72

    Performance

    Renders faster than
    82% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

o571.com

杭州写字楼网-杭州写字楼出租出售租赁求租杭州办公室办公楼

Page Load Speed

8.2 sec in total

First Response

691 ms

Resources Loaded

7.2 sec

Page Rendered

297 ms

o571.com screenshot

About Website

Visit o571.com now to see the best up-to-date O 571 content for China and also check out these interesting facts you probably never knew about o571.com

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Visit o571.com

Key Findings

We analyzed O571.com page load time and found that the first response time was 691 ms and then it took 7.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

o571.com performance score

72

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

76/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

20/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value3.4 s

93/100

10%

Network Requests Diagram

o571.com

691 ms

www.o571.com

1085 ms

style.css

227 ms

master.css

442 ms

img_slide.js

650 ms

Our browser made a total of 85 requests to load all elements on the main page. We found that 28% of them (24 requests) were addressed to the original O571.com, 49% (42 requests) were made to Img.o571.com and 13% (11 requests) were made to Www5c1.53kf.com. The less responsive or slowest element that took the longest time to load (2.6 sec) relates to the external source Img.o571.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 137.0 kB (11%)

Content Size

1.3 MB

After Optimization

1.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of O571.com main page is 1.3 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. 55% of websites need less resources to load. Images take 1.1 MB which makes up the majority of the site volume.

HTML Optimization

-78%

Potential reduce by 74.6 kB

  • Original 95.4 kB
  • After minification 85.1 kB
  • After compression 20.8 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 10.2 kB, which is 11% 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 74.6 kB or 78% of the original size.

Image Optimization

-4%

Potential reduce by 50.2 kB

  • Original 1.1 MB
  • After minification 1.1 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. O 571 images are well optimized though.

JavaScript Optimization

-16%

Potential reduce by 10.5 kB

  • Original 67.6 kB
  • After minification 67.6 kB
  • After compression 57.1 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 10.5 kB or 16% of the original size.

CSS Optimization

-33%

Potential reduce by 1.8 kB

  • Original 5.3 kB
  • After minification 5.3 kB
  • After compression 3.6 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. O571.com needs all CSS files to be minified and compressed as it can save up to 1.8 kB or 33% of the original size.

Requests Breakdown

Number of requests can be reduced by 14 (17%)

Requests Now

81

After Optimization

67

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 81 CSS, Javascripts, AJAX and image requests in order to completely render the main page of O 571. 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

o571.com

o571.com

691 ms

www.o571.com

www.o571.com

1085 ms

style.css

style.css

227 ms

master.css

master.css

442 ms

img_slide.js

img_slide.js

650 ms

jquery.js

jquery.js

1014 ms

c.js

c.js

861 ms

clock_new.js

clock_new.js

879 ms

indexo571.js

indexo571.js

884 ms

bg.png

bg.png

448 ms

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20210106133034008.jpg

1210 ms

wxlg_office.gif

wxlg_office.gif

210 ms

logo.gif

logo.gif

225 ms

hyzy.jpg

hyzy.jpg

206 ms

weixino.jpg

weixino.jpg

655 ms

o571.png

o571.png

222 ms

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1031 ms

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1508 ms

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1540 ms

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1599 ms

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1635 ms

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1919 ms

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1718 ms

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1765 ms

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1794 ms

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1855 ms

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2139 ms

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1982 ms

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1990 ms

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2053 ms

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2136 ms

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2252 ms

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2556 ms

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2380 ms

navbar_bg.gif

navbar_bg.gif

222 ms

wind.jpg

wind.jpg

348 ms

css.png

css.png

322 ms

xzl_fcfb.gif

xzl_fcfb.gif

346 ms

arrow_1.gif

arrow_1.gif

346 ms

browser2.jpg

browser2.jpg

570 ms

5starlogo.png

5starlogo.png

507 ms

gongshang.jpg

gongshang.jpg

534 ms

gonganbig.png

gonganbig.png

566 ms

2

2

1519 ms

h.js

h.js

980 ms

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20210406154027813.jpg

1391 ms

atrk.js

atrk.js

16 ms

push.js

push.js

1186 ms

hm.gif

hm.gif

300 ms

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1353 ms

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1445 ms

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1360 ms

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1345 ms

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1346 ms

sendacc.jsp

sendacc.jsp

1266 ms

mobile_icon_default.js

mobile_icon_default.js

1263 ms

mobile_invite_default.js

mobile_invite_default.js

1275 ms

assign_worker_default.js

assign_worker_default.js

1283 ms

mobile_chat_default.js

mobile_chat_default.js

1315 ms

kf_new.php

kf_new.php

1417 ms

kf_ivt_new.php

kf_ivt_new.php

429 ms

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1390 ms

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0 ms

ivt_cn.gif

ivt_cn.gif

203 ms

fu-button1_cn.gif

fu-button1_cn.gif

201 ms

fu-button2_cn.gif

fu-button2_cn.gif

201 ms

mobile_53kf_1557898010.jpg

mobile_53kf_1557898010.jpg

421 ms

jquery-1.4.2.flp.js

jquery-1.4.2.flp.js

412 ms

Accessibility Review

o571.com accessibility score

68

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best Practices

o571.com best practices score

58

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

o571.com SEO score

58

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise O571.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 O571.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

o571.com

Open Graph description is not detected on the main page of O 571. 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: