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Report Summary

  • 67

    Performance

    Renders faster than
    79% of other websites

  • 50

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

51dbt.com

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Page Load Speed

2.6 sec in total

First Response

371 ms

Resources Loaded

2.2 sec

Page Rendered

56 ms

51dbt.com screenshot

About Website

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Key Findings

We analyzed 51dbt.com page load time and found that the first response time was 371 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

51dbt.com performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

53/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

81/100

25%

SI (Speed Index)

Value6.7 s

36/100

10%

TBT (Total Blocking Time)

Value320 ms

76/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value34.6 s

0/100

10%

Network Requests Diagram

index.php

371 ms

push.js

696 ms

common.js

72 ms

tj.js

134 ms

hm.js

928 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that 25% of them (3 requests) were addressed to the original 51dbt.com, 50% (6 requests) were made to Hm.baidu.com and 17% (2 requests) were made to Sstatic1.histats.com. The less responsive or slowest element that took the longest time to load (964 ms) relates to the external source Hm.baidu.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 740 B (13%)

Content Size

5.9 kB

After Optimization

5.2 kB

  • HTML
  • JavaScript

In fact, the total size of 51dbt.com main page is 5.9 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. Javascripts take 4.6 kB which makes up the majority of the site volume.

HTML Optimization

-51%

Potential reduce by 667 B

  • Original 1.3 kB
  • After minification 1.3 kB
  • After compression 653 B

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 667 B or 51% of the original size.

JavaScript Optimization

-2%

Potential reduce by 73 B

  • Original 4.6 kB
  • After minification 4.6 kB
  • After compression 4.5 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.

Requests Breakdown

Number of requests can be reduced by 5 (45%)

Requests Now

11

After Optimization

6

  • Images
  • JavaScript

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 51 Dbt. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

index.php

index.php

371 ms

push.js

push.js

696 ms

common.js

common.js

72 ms

tj.js

tj.js

134 ms

hm.js

hm.js

928 ms

hm.js

hm.js

964 ms

0.gif

0.gif

45 ms

hm.js

hm.js

951 ms

0.gif

0.gif

45 ms

hm.gif

hm.gif

273 ms

hm.gif

hm.gif

299 ms

hm.gif

hm.gif

284 ms

Accessibility Review

51dbt.com accessibility score

50

Accessibility Issues

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

<frame> or <iframe> elements do not have a title

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

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

51dbt.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

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

51dbt.com SEO score

92

Search Engine Optimization Advices

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

    GB2312

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise 51dbt.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 51dbt.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

51dbt.com

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