Tools & Wizards About Us

Report Summary

  • 56

    Performance

    Renders faster than
    72% of other websites

  • 47

    Accessibility

    Visual factors better than
    that of 20% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 83

    SEO

    Google-friendlier than
    46% of websites

5151sc.com

点购收藏网[人民币/金银币/邮票]最专业的邮币卡网上商城

Page Load Speed

32.5 sec in total

First Response

2.5 sec

Resources Loaded

29.6 sec

Page Rendered

385 ms

About Website

Visit 5151sc.com now to see the best up-to-date 5151 Sc content for China and also check out these interesting facts you probably never knew about 5151sc.com

点购收藏网即是国内邮币卡收藏领域中实力雄厚的电子商务网站,也是高层次的商务礼品网站.常年收售中国金银币礼品,纸币,邮票等.送礼送文化,送礼送价值.郑重声明:本公司所售金银币,邮票,珍邮,人民币收藏品等绝对保真.客服:13718125151 400-689-8851

Visit 5151sc.com

Key Findings

We analyzed 5151sc.com page load time and found that the first response time was 2.5 sec and then it took 30 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 4 request timeouts, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

5151sc.com performance score

56

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.1 s

21/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

42/100

25%

SI (Speed Index)

Value13.9 s

1/100

10%

TBT (Total Blocking Time)

Value50 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.241

51/100

15%

TTI (Time to Interactive)

Value7.0 s

53/100

10%

Network Requests Diagram

www.5151sc.com

2464 ms

header.css

591 ms

index.css

762 ms

jquery.min.js

1296 ms

index.js

627 ms

Our browser made a total of 269 requests to load all elements on the main page. We found that 15% of them (40 requests) were addressed to the original 5151sc.com, 64% (172 requests) were made to Pic.5151sc.com and 21% (57 requests) were made to Img.5151sc.com. The less responsive or slowest element that took the longest time to load (20 sec) relates to the external source Img.5151sc.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 419.9 kB (8%)

Content Size

5.0 MB

After Optimization

4.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of 5151sc.com main page is 5.0 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. 65% of websites need less resources to load. Images take 4.7 MB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 138.8 kB

  • Original 159.4 kB
  • After minification 142.9 kB
  • After compression 20.7 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 138.8 kB or 87% of the original size.

Image Optimization

-4%

Potential reduce by 187.1 kB

  • Original 4.7 MB
  • After minification 4.5 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. 5151 Sc images are well optimized though.

JavaScript Optimization

-67%

Potential reduce by 74.0 kB

  • Original 110.7 kB
  • After minification 107.8 kB
  • After compression 36.7 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 74.0 kB or 67% of the original size.

CSS Optimization

-80%

Potential reduce by 20.0 kB

  • Original 25.1 kB
  • After minification 22.7 kB
  • After compression 5.0 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. 5151sc.com needs all CSS files to be minified and compressed as it can save up to 20.0 kB or 80% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

264

After Optimization

264

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 264 CSS, Javascripts, AJAX and image requests in order to completely render the main page of 5151 Sc. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

5151sc.com accessibility score

47

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

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

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

5151sc.com best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

5151sc.com SEO score

83

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

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

High

Tap targets are not sized appropriately

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 5151sc.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 5151sc.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

Open Graph description is not detected on the main page of 5151 Sc. 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: