Tools & Wizards About Us
51zbz.com screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    35% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

51zbz.com

我要找标准-标准下载-标准免费下载-我要找标准-www.51zbz.com-免费标准下载网

Page Load Speed

10.5 sec in total

First Response

691 ms

Resources Loaded

9.6 sec

Page Rendered

251 ms

51zbz.com screenshot

About Website

Click here to check amazing 51 Zbz content for China. Otherwise, check out these important facts you probably never knew about 51zbz.com

我要找标准www.51zbz.com作为免费标准下载网站致力于收集网络上各类最新最全的国家标准、行业标准、地方标准、企业标准，提供标准下载。所有标准免费下载，无需注册，仅供参考。

Visit 51zbz.com

Key Findings

We analyzed 51zbz.com page load time and found that the first response time was 691 ms and then it took 9.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

51zbz.com performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value9.1 s

1/100

25%

SI (Speed Index)

Value11.1 s

6/100

10%

TBT (Total Blocking Time)

Value2,770 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.9 s

13/100

10%

Network Requests Diagram

51zbz.com

691 ms

51zbz.com

908 ms

adsbygoogle.js

110 ms

style.css

225 ms

js

63 ms

Our browser made a total of 44 requests to load all elements on the main page. We found that 25% of them (11 requests) were addressed to the original 51zbz.com, 14% (6 requests) were made to Tpc.googlesyndication.com and 11% (5 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Hm.baidu.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 78.6 kB (15%)

Content Size

531.2 kB

After Optimization

452.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 51zbz.com main page is 531.2 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. 50% of websites need less resources to load. Javascripts take 439.0 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 46.6 kB

  • Original 62.6 kB
  • After minification 61.9 kB
  • After compression 16.0 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 46.6 kB or 74% of the original size.

Image Optimization

-2%

Potential reduce by 510 B

  • Original 25.3 kB
  • After minification 24.8 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. 51 Zbz images are well optimized though.

JavaScript Optimization

-7%

Potential reduce by 30.3 kB

  • Original 439.0 kB
  • After minification 438.8 kB
  • After compression 408.7 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. This website has mostly compressed JavaScripts.

CSS Optimization

-28%

Potential reduce by 1.2 kB

  • Original 4.4 kB
  • After minification 4.4 kB
  • After compression 3.2 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. 51zbz.com needs all CSS files to be minified and compressed as it can save up to 1.2 kB or 28% of the original size.

Requests Breakdown

Number of requests can be reduced by 29 (73%)

Requests Now

40

After Optimization

11

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 40 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Zbz. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 21 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

51zbz.com

51zbz.com

691 ms

51zbz.com

51zbz.com

908 ms

adsbygoogle.js

adsbygoogle.js

110 ms

style.css

style.css

225 ms

js

js

63 ms

21575983.js

21575983.js

594 ms

show_ads_impl.js

show_ads_impl.js

374 ms

js

js

55 ms

analytics.js

analytics.js

22 ms

icon_rss.gif

icon_rss.gif

222 ms

logo.gif

logo.gif

444 ms

11.0.1.js

11.0.1.js

831 ms

collect

collect

67 ms

zrt_lookup.html

zrt_lookup.html

34 ms

ads

ads

564 ms

ab77b6ea7f3fbf79.js

ab77b6ea7f3fbf79.js

557 ms

reactive_library.js

reactive_library.js

148 ms

ca-pub-2881489426110401

ca-pub-2881489426110401

64 ms

load_preloaded_resource.js

load_preloaded_resource.js

51 ms

icon.png

icon.png

37 ms

abg_lite.js

abg_lite.js

49 ms

s

s

36 ms

window_focus.js

window_focus.js

69 ms

qs_click_protection.js

qs_click_protection.js

69 ms

ufs_web_display.js

ufs_web_display.js

38 ms

bbae3fd3506d8d9338f85d10ea9db8af.js

bbae3fd3506d8d9338f85d10ea9db8af.js

235 ms

fullscreen_api_adapter.js

fullscreen_api_adapter.js

50 ms

interstitial_ad_frame.js

interstitial_ad_frame.js

49 ms

feedback_grey600_24dp.png

feedback_grey600_24dp.png

226 ms

settings_grey600_24dp.png

settings_grey600_24dp.png

226 ms

css

css

82 ms

push.js

push.js

1129 ms

top_bg.gif

top_bg.gif

223 ms

btn_soundon.gif

btn_soundon.gif

218 ms

title_bg1.jpg

title_bg1.jpg

426 ms

icon_li4.gif

icon_li4.gif

436 ms

sider_bg1.jpg

sider_bg1.jpg

693 ms

title_bg2.jpg

title_bg2.jpg

693 ms

ads

ads

408 ms

h.js

h.js

1866 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrw2IJllpyw.ttf

15 ms

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

4Ua_rENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iqcsih3SAyH6cAwhX9RFD48TE63OOYKtrwEIJllpyw.ttf

20 ms

sa30O7WeJNzu8x7oKdCcujxNj08-gvZudrea3FT7Uzc.js

sa30O7WeJNzu8x7oKdCcujxNj08-gvZudrea3FT7Uzc.js

3 ms

hm.gif

hm.gif

305 ms

Accessibility Review

51zbz.com accessibility score

86

Accessibility Issues

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

Form elements do not have associated labels

Best Practices

51zbz.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Page has valid source maps

SEO Factors

51zbz.com SEO score

77

Search Engine Optimization Advices

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 51zbz.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 51zbz.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

51zbz.com

Open Graph description is not detected on the main page of 51 Zbz. 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: