Report Summary

  • 54

    Performance

    Renders faster than
    71% of other websites

  • 41

    Accessibility

    Visual factors better than
    that of 19% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

Page Load Speed

13 sec in total

First Response

427 ms

Resources Loaded

8 sec

Page Rendered

4.6 sec

zf458.com screenshot

About Website

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Key Findings

We analyzed Zf458.com page load time and found that the first response time was 427 ms and then it took 12.6 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

zf458.com performance score

54

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value85.3 s

0/100

25%

SI (Speed Index)

Value5.1 s

62/100

10%

TBT (Total Blocking Time)

Value10 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.114

86/100

15%

TTI (Time to Interactive)

Value50.4 s

0/100

10%

Network Requests Diagram

www.zf458.com

427 ms

iconfont.css

119 ms

stui_default.css

119 ms

jquery.min.js

127 ms

stui_default.js

126 ms

Our browser made a total of 67 requests to load all elements on the main page. We found that 33% of them (22 requests) were addressed to the original Zf458.com, 4% (3 requests) were made to P.qlogo.cn and 3% (2 requests) were made to Dimg04.c-ctrip.com. The less responsive or slowest element that took the longest time to load (6.9 sec) relates to the external source P.qlogo.cn.

Page Optimization Overview & Recommendations

Page size can be reduced by 204.1 kB (69%)

Content Size

295.4 kB

After Optimization

91.3 kB

In fact, the total size of Zf458.com main page is 295.4 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. 45% of websites need less resources to load. HTML takes 185.6 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 142.3 kB

  • Original 185.6 kB
  • After minification 185.0 kB
  • After compression 43.3 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 142.3 kB or 77% of the original size.

Image Optimization

-25%

Potential reduce by 612 B

  • Original 2.5 kB
  • After minification 1.8 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. Obviously, Zf 458 needs image optimization as it can save up to 612 B or 25% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-59%

Potential reduce by 59.8 kB

  • Original 101.6 kB
  • After minification 101.5 kB
  • After compression 41.8 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 59.8 kB or 59% of the original size.

CSS Optimization

-24%

Potential reduce by 1.4 kB

  • Original 5.8 kB
  • After minification 5.8 kB
  • After compression 4.4 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. Zf458.com needs all CSS files to be minified and compressed as it can save up to 1.4 kB or 24% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (29%)

Requests Now

42

After Optimization

30

The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zf 458. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

zf458.com accessibility score

41

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

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

High

[lang] attributes do not have a valid value

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

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

zf458.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

High

Page has valid source maps

SEO Factors

zf458.com SEO score

82

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 Zf458.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 Zf458.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 Zf 458. 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: