Tools & Wizards About Us
o571.com screenshot

Report Summary

  • 17

    Performance

    Renders faster than
    32% of other websites

  • 68

    Accessibility

    Visual factors better than
    that of 33% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    19% of websites

  • 58

    SEO

    Google-friendlier than
    20% of websites

o571.com

写字楼-商业地产-杭州写字楼出租出售租赁求租杭州办公室办公楼-杭州写字楼网

Page Load Speed

54.2 sec in total

First Response

1.4 sec

Resources Loaded

52.5 sec

Page Rendered

412 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

写字楼网有杭州写字楼出租出售杭州办公楼出租杭州商业地产招商,免费发布求租求购信息,是网站资质齐全的中国写字楼网.HangZhou Office Building

Visit o571.com

Key Findings

We analyzed O571.com page load time and found that the first response time was 1.4 sec and then it took 52.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there were 2 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

o571.com performance score

17

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

20/100

10%

LCP (Largest Contentful Paint)

Value13.0 s

0/100

25%

SI (Speed Index)

Value32.4 s

0/100

10%

TBT (Total Blocking Time)

Value21,530 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value45.1 s

0/100

10%

Network Requests Diagram

o571.com

1378 ms

www.o571.com

8502 ms

b.css

1239 ms

c.css

4464 ms

img_slide.js

1024 ms

Our browser made a total of 105 requests to load all elements on the main page. We found that 22% of them (23 requests) were addressed to the original O571.com, 70% (73 requests) were made to Img.o571.com and 4% (4 requests) were made to Www17.53kf.com. The less responsive or slowest element that took the longest time to load (19.7 sec) relates to the external source Img.o571.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 331.8 kB (28%)

Content Size

1.2 MB

After Optimization

852.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of O571.com main page is 1.2 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. 35% of websites need less resources to load. Images take 827.6 kB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 153.6 kB

  • Original 174.2 kB
  • After minification 142.8 kB
  • After compression 20.6 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 31.4 kB, which is 18% 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 153.6 kB or 88% of the original size.

Image Optimization

-6%

Potential reduce by 53.4 kB

  • Original 827.6 kB
  • After minification 774.3 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. O 571 images are well optimized though.

JavaScript Optimization

-66%

Potential reduce by 98.6 kB

  • Original 149.6 kB
  • After minification 149.4 kB
  • After compression 51.0 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 98.6 kB or 66% of the original size.

CSS Optimization

-79%

Potential reduce by 26.2 kB

  • Original 33.1 kB
  • After minification 27.7 kB
  • After compression 7.0 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 26.2 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (10%)

Requests Now

100

After Optimization

90

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 100 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 11 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

o571.com

o571.com

1378 ms

www.o571.com

www.o571.com

8502 ms

b.css

b.css

1239 ms

c.css

c.css

4464 ms

img_slide.js

img_slide.js

1024 ms

jquery.js

jquery.js

8386 ms

c.js

c.js

2621 ms

clock_new.js

clock_new.js

449 ms

jquery.tooltip.js

jquery.tooltip.js

529 ms

indexo571.js

indexo571.js

529 ms

kf.php

kf.php

2940 ms

kf.php

kf.php

1081 ms

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4605 ms

mainbg.png

mainbg.png

1916 ms

wxlg_office.gif

wxlg_office.gif

527 ms

logo.gif

logo.gif

2369 ms

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4749 ms

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439 ms

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551 ms

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2518 ms

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19508 ms

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19701 ms

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navbar_bg.gif

navbar_bg.gif

1098 ms

wind.jpg

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1541 ms

css.png

css.png

5191 ms

title.gif

title.gif

2818 ms

arrow_1.gif

arrow_1.gif

2299 ms

browser2.jpg

browser2.jpg

4371 ms

h.js

h.js

914 ms

sendacc.jsp

sendacc.jsp

1788 ms

kf_new.php

kf_new.php

2724 ms

hm.gif

hm.gif

456 ms

kf_ivt_new.php

kf_ivt_new.php

1839 ms

blue2_off.gif

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1451 ms

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14685 ms

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14922 ms

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19187 ms

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15784 ms

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3044 ms

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14694 ms

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17942 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

    GB2312

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 gb2312. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

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: