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centrumalerts.com screenshot

Report Summary

  • 27

    Performance

    Renders faster than
    46% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 56% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 88

    SEO

    Google-friendlier than
    65% of websites

centrumalerts.com

Page Load Speed

1.1 sec in total

First Response

47 ms

Resources Loaded

853 ms

Page Rendered

195 ms

centrumalerts.com screenshot

About Website

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Key Findings

We analyzed Centrumalerts.com page load time and found that the first response time was 47 ms and then it took 1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

centrumalerts.com performance score

27

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.0 s

50/100

10%

LCP (Largest Contentful Paint)

Value5.4 s

21/100

25%

SI (Speed Index)

Value7.0 s

32/100

10%

TBT (Total Blocking Time)

Value3,280 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value0.14

79/100

15%

TTI (Time to Interactive)

Value14.2 s

9/100

10%

Network Requests Diagram

centrumalerts.com

47 ms

jquery.min.js

93 ms

angular.min.js

108 ms

angular-cookies.js

125 ms

bootstrap.min.css

121 ms

Our browser made a total of 42 requests to load all elements on the main page. We found that 26% of them (11 requests) were addressed to the original Centrumalerts.com, 12% (5 requests) were made to Stripe.rs-stripe.com and 10% (4 requests) were made to Content-ai.com. The less responsive or slowest element that took the longest time to load (508 ms) relates to the external source S3-us-west-2.amazonaws.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 131.9 kB (38%)

Content Size

347.8 kB

After Optimization

215.9 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Centrumalerts.com main page is 347.8 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. Javascripts take 287.3 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 13.1 kB

  • Original 18.6 kB
  • After minification 17.0 kB
  • After compression 5.5 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 13.1 kB or 71% of the original size.

Image Optimization

-27%

Potential reduce by 2.5 kB

  • Original 9.2 kB
  • After minification 6.8 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, Centrumalerts needs image optimization as it can save up to 2.5 kB or 27% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-32%

Potential reduce by 91.0 kB

  • Original 287.3 kB
  • After minification 287.2 kB
  • After compression 196.3 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 91.0 kB or 32% of the original size.

CSS Optimization

-77%

Potential reduce by 25.3 kB

  • Original 32.7 kB
  • After minification 32.6 kB
  • After compression 7.4 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. Centrumalerts.com needs all CSS files to be minified and compressed as it can save up to 25.3 kB or 77% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (63%)

Requests Now

35

After Optimization

13

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Centrumalerts. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

centrumalerts.com

centrumalerts.com

47 ms

jquery.min.js

jquery.min.js

93 ms

angular.min.js

angular.min.js

108 ms

angular-cookies.js

angular-cookies.js

125 ms

bootstrap.min.css

bootstrap.min.css

121 ms

bootstrap.min.js

bootstrap.min.js

135 ms

ui-bootstrap-tpls-0.12.1.min.js

ui-bootstrap-tpls-0.12.1.min.js

134 ms

custom.css

custom.css

74 ms

css

css

112 ms

common.js

common.js

35 ms

font-awesome.min.css

font-awesome.min.css

140 ms

gpt.js

gpt.js

139 ms

progressbar.css

progressbar.css

34 ms

sw.js

sw.js

32 ms

js

js

138 ms

adsbygoogle.js

adsbygoogle.js

135 ms

jquery.min.js

jquery.min.js

69 ms

bootstrap.min.js

bootstrap.min.js

59 ms

searchbar.js

searchbar.js

57 ms

jqueryscripttop.css

jqueryscripttop.css

79 ms

loader2.gif

loader2.gif

27 ms

pubads_impl_2022101002.js

pubads_impl_2022101002.js

12 ms

ppub_config

ppub_config

179 ms

a3fa5167d5fabfa351b0246a2adb334a.js

a3fa5167d5fabfa351b0246a2adb334a.js

327 ms

logo.png

logo.png

268 ms

ge.js

ge.js

508 ms

search-icon.png

search-icon.png

207 ms

image

image

355 ms

location.png

location.png

176 ms

image

image

336 ms

image

image

336 ms

image

image

337 ms

powerinbox-rec-reg.png

powerinbox-rec-reg.png

337 ms

analytics.js

analytics.js

37 ms

collect

collect

51 ms

235 ms

199 ms

es6-promise.min.js

es6-promise.min.js

102 ms

webpush-services.min.js

webpush-services.min.js

190 ms

hub.html

hub.html

92 ms

41 ms

72 ms

Accessibility Review

centrumalerts.com accessibility score

84

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

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.

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

Links do not have a discernible name

Best Practices

centrumalerts.com best practices score

67

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

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

centrumalerts.com SEO score

88

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

robots.txt is not valid

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

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Centrumalerts.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Centrumalerts.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

centrumalerts.com

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