Tools & Wizards About Us
archivesbb.nbclearn.com screenshot

Report Summary

  • 21

    Performance

    Renders faster than
    39% of other websites

  • 84

    Accessibility

    Visual factors better than
    that of 57% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

archivesbb.nbclearn.com

NBC News Learn - YouTube

Page Load Speed

3.7 sec in total

First Response

40 ms

Resources Loaded

3.6 sec

Page Rendered

132 ms

archivesbb.nbclearn.com screenshot

About Website

Welcome to archivesbb.nbclearn.com homepage info - get ready to check Archivesbb NBC Learn best content for United States right away, or after learning these important things about archivesbb.nbclearn.com

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Key Findings

We analyzed Archivesbb.nbclearn.com page load time and found that the first response time was 40 ms and then it took 3.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

archivesbb.nbclearn.com performance score

21

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

63/100

10%

LCP (Largest Contentful Paint)

Value15.1 s

0/100

25%

SI (Speed Index)

Value12.0 s

4/100

10%

TBT (Total Blocking Time)

Value4,360 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.074

95/100

15%

TTI (Time to Interactive)

Value20.6 s

2/100

10%

Network Requests Diagram

archivesbb.nbclearn.com

40 ms

BbHigherEd

31 ms

jquery-ui.css

950 ms

navigation.css

922 ms

aod_modal.css

890 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Archivesbb.nbclearn.com, 71% (29 requests) were made to Static.nbclearn.com and 10% (4 requests) were made to Cm.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (2.2 sec) relates to the external source S7.addthis.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.6 MB (78%)

Content Size

2.1 MB

After Optimization

451.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Archivesbb.nbclearn.com main page is 2.1 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. 40% of websites need less resources to load. Javascripts take 1.7 MB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 108.1 kB

  • Original 140.9 kB
  • After minification 140.8 kB
  • After compression 32.8 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 108.1 kB or 77% of the original size.

Image Optimization

-18%

Potential reduce by 3.6 kB

  • Original 20.1 kB
  • After minification 16.6 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, Archivesbb NBC Learn needs image optimization as it can save up to 3.6 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-78%

Potential reduce by 1.3 MB

  • Original 1.7 MB
  • After minification 1.4 MB
  • After compression 376.0 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 1.3 MB or 78% of the original size.

CSS Optimization

-87%

Potential reduce by 176.2 kB

  • Original 202.1 kB
  • After minification 139.0 kB
  • After compression 25.9 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. Archivesbb.nbclearn.com needs all CSS files to be minified and compressed as it can save up to 176.2 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 22 (69%)

Requests Now

32

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 32 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Archivesbb NBC Learn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

archivesbb.nbclearn.com

archivesbb.nbclearn.com

40 ms

BbHigherEd

BbHigherEd

31 ms

jquery-ui.css

jquery-ui.css

950 ms

navigation.css

navigation.css

922 ms

aod_modal.css

aod_modal.css

890 ms

aod.css

aod.css

934 ms

jquery.readonly.css

jquery.readonly.css

884 ms

jquery-1.8.3.js

jquery-1.8.3.js

832 ms

jquery-ui.js

jquery-ui.js

840 ms

jquery.validate.min.js

jquery.validate.min.js

845 ms

jquery.tools.tooltip.js

jquery.tools.tooltip.js

846 ms

jquery.form.js

jquery.form.js

849 ms

jquery.readonly.js

jquery.readonly.js

851 ms

jqModal.js

jqModal.js

852 ms

jquery.cycle.all.min.js

jquery.cycle.all.min.js

855 ms

mashup_core.js

mashup_core.js

856 ms

validate_core.js

validate_core.js

859 ms

validate_form.js

validate_form.js

862 ms

s_code.js

s_code.js

1002 ms

addthis_widget.js

addthis_widget.js

243 ms

swfobject.js

swfobject.js

1001 ms

jquery.zclip.min.js

jquery.zclip.min.js

884 ms

jquery.corner.js

jquery.corner.js

1018 ms

tipped.css

tipped.css

915 ms

tipped.js

tipped.js

921 ms

header-gradient.jpg

header-gradient.jpg

62 ms

flash-logo.jpg

flash-logo.jpg

62 ms

ui-bg_flat_75_ffffff_40x100.png

ui-bg_flat_75_ffffff_40x100.png

54 ms

300lo.json

300lo.json

25 ms

ui-bg_highlight-soft_75_cccccc_1x100.png

ui-bg_highlight-soft_75_cccccc_1x100.png

56 ms

ui-bg_glass_75_e6e6e6_1x400.png

ui-bg_glass_75_e6e6e6_1x400.png

58 ms

popup_button_bg.gif

popup_button_bg.gif

59 ms

ui-bg_flat_0_aaaaaa_40x100.png

ui-bg_flat_0_aaaaaa_40x100.png

57 ms

sh.7c7179124ea24ac6ba46caac.html

sh.7c7179124ea24ac6ba46caac.html

52 ms

layers.3643cb2e25fb91c29386.js

layers.3643cb2e25fb91c29386.js

2219 ms

datapair

datapair

40 ms

5 ms

pixel

pixel

22 ms

pixel

pixel

21 ms

pixel

pixel

18 ms

pixel

pixel

20 ms

Accessibility Review

archivesbb.nbclearn.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

High

[role]s are not contained by their required parent element

High

ARIA tooltip elements do not have accessible names.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

Best Practices

archivesbb.nbclearn.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

archivesbb.nbclearn.com SEO score

62

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

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 Archivesbb.nbclearn.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 Archivesbb.nbclearn.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

archivesbb.nbclearn.com

Open Graph description is not detected on the main page of Archivesbb NBC Learn. 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: