Tools & Wizards About Us
vixcentral.com screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 50

    SEO

    Google-friendlier than
    19% of websites

vixcentral.com

VIX Term Structure

Page Load Speed

605 ms in total

First Response

40 ms

Resources Loaded

443 ms

Page Rendered

122 ms

vixcentral.com screenshot

About Website

Visit vixcentral.com now to see the best up-to-date VIX Central content for Italy and also check out these interesting facts you probably never knew about vixcentral.com

Follow the VIX term structure graphically in real time. See the extent of the contango or backwardation. Retrieve and display historical VIX term structures all with a simple and intuitive interface.

Visit vixcentral.com

Key Findings

We analyzed Vixcentral.com page load time and found that the first response time was 40 ms and then it took 565 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

vixcentral.com performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.9 s

52/100

10%

LCP (Largest Contentful Paint)

Value23.0 s

0/100

25%

SI (Speed Index)

Value11.2 s

5/100

10%

TBT (Total Blocking Time)

Value4,740 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.138

79/100

15%

TTI (Time to Interactive)

Value25.6 s

0/100

10%

Network Requests Diagram

vixcentral.com

40 ms

jquery-ui.css

16 ms

uat.js

68 ms

jquery.min.js

23 ms

jquery-ui.min.js

42 ms

Our browser made a total of 24 requests to load all elements on the main page. We found that 13% of them (3 requests) were addressed to the original Vixcentral.com, 33% (8 requests) were made to Ajax.googleapis.com and 17% (4 requests) were made to Code.highcharts.com. The less responsive or slowest element that took the longest time to load (149 ms) relates to the external source Platform.twitter.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 43.5 kB (20%)

Content Size

216.5 kB

After Optimization

172.9 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Vixcentral.com main page is 216.5 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 153.5 kB which makes up the majority of the site volume.

HTML Optimization

-76%

Potential reduce by 42.8 kB

  • Original 56.1 kB
  • After minification 56.1 kB
  • After compression 13.3 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 42.8 kB or 76% of the original size.

Image Optimization

-10%

Potential reduce by 676 B

  • Original 6.8 kB
  • After minification 6.1 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. VIX Central images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 153.5 kB
  • After minification 153.5 kB
  • After compression 153.5 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 9 (39%)

Requests Now

23

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 23 CSS, Javascripts, AJAX and image requests in order to completely render the main page of VIX Central. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

vixcentral.com

vixcentral.com

40 ms

jquery-ui.css

jquery-ui.css

16 ms

uat.js

uat.js

68 ms

jquery.min.js

jquery.min.js

23 ms

jquery-ui.min.js

jquery-ui.min.js

42 ms

highcharts.js

highcharts.js

69 ms

exporting.js

exporting.js

99 ms

export-data.js

export-data.js

97 ms

offline-exporting.js

offline-exporting.js

108 ms

analytics.js

analytics.js

10 ms

collect

collect

108 ms

ui-bg_gloss-wave_100_ece8da_500x100.png

ui-bg_gloss-wave_100_ece8da_500x100.png

79 ms

widgets.js

widgets.js

119 ms

ajax_update

ajax_update

35 ms

ajax_historical

ajax_historical

33 ms

collect

collect

11 ms

collect

collect

14 ms

ui-bg_highlight-hard_100_f5f3e5_1x100.png

ui-bg_highlight-hard_100_f5f3e5_1x100.png

14 ms

ui-bg_highlight-hard_15_459e00_1x100.png

ui-bg_highlight-hard_15_459e00_1x100.png

17 ms

ui-icons_eeeeee_256x240.png

ui-icons_eeeeee_256x240.png

15 ms

ui-bg_highlight-hard_100_fafaf4_1x100.png

ui-bg_highlight-hard_100_fafaf4_1x100.png

17 ms

collect

collect

72 ms

js

js

92 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

149 ms

Accessibility Review

vixcentral.com accessibility score

98

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

Best Practices

vixcentral.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

vixcentral.com SEO score

50

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

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 Vixcentral.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 Vixcentral.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

vixcentral.com

Open Graph description is not detected on the main page of VIX Central. 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: