Tools & Wizards About Us

Report Summary

  • 39

    Performance

    Renders faster than
    58% of other websites

  • 57

    Accessibility

    Visual factors better than
    that of 24% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

sf-diamond.com

PCD Blanks For Cutting Tools | PCBN | PCD | Henan SF DIAMOND CO.,LTD.

Page Load Speed

6.2 sec in total

First Response

825 ms

Resources Loaded

4.5 sec

Page Rendered

833 ms

About Website

Welcome to sf-diamond.com homepage info - get ready to check SF DIAMOND best content right away, or after learning these important things about sf-diamond.com

-SF Diamond (SFD for short) is a high-tech enterprise that specializes in the manufacture of Polycrystalline Diamond (PCD) and related products. SF Diamond was founded in 1997 in the city of Zhengzhou...

Visit sf-diamond.com

Key Findings

We analyzed Sf-diamond.com page load time and found that the first response time was 825 ms and then it took 5.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

sf-diamond.com performance score

39

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

68/100

10%

LCP (Largest Contentful Paint)

Value4.9 s

28/100

25%

SI (Speed Index)

Value7.3 s

28/100

10%

TBT (Total Blocking Time)

Value850 ms

34/100

30%

CLS (Cumulative Layout Shift)

Value0.233

53/100

15%

TTI (Time to Interactive)

Value7.5 s

47/100

10%

Network Requests Diagram

sf-diamond.com

825 ms

gtm.js

95 ms

style.css

644 ms

jquery.min.js

661 ms

owl.carousel.min.js

443 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 77% of them (33 requests) were addressed to the original Sf-diamond.com, 7% (3 requests) were made to Google.com and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (2.9 sec) belongs to the original domain Sf-diamond.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 66.1 kB (6%)

Content Size

1.1 MB

After Optimization

1.0 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sf-diamond.com main page is 1.1 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 927.7 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 23.4 kB

  • Original 29.7 kB
  • After minification 28.8 kB
  • After compression 6.2 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 23.4 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 577 B

  • Original 927.7 kB
  • After minification 927.1 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. SF DIAMOND images are well optimized though.

JavaScript Optimization

-33%

Potential reduce by 41.9 kB

  • Original 126.3 kB
  • After minification 125.7 kB
  • After compression 84.4 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 41.9 kB or 33% of the original size.

CSS Optimization

-39%

Potential reduce by 249 B

  • Original 633 B
  • After minification 585 B
  • After compression 384 B

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. Sf-diamond.com needs all CSS files to be minified and compressed as it can save up to 249 B or 39% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (16%)

Requests Now

37

After Optimization

31

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 37 CSS, Javascripts, AJAX and image requests in order to completely render the main page of SF DIAMOND. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

sf-diamond.com accessibility score

57

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.

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

<dl>'s do not contain only properly-ordered <dt> and <dd> groups, <script>, <template> or <div> elements.

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

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

sf-diamond.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

sf-diamond.com SEO score

85

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sf-diamond.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 Sf-diamond.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 SF DIAMOND. 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: