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vlib.us screenshot

Report Summary

  • 100

    Performance

    Renders faster than
    97% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 58

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

vlib.us

WWW Virtual Library @ www.vlib.us | WWW-VL | United States History; World History; WWI; American History Documents; US Art Museums; US History Museums...

Page Load Speed

596 ms in total

First Response

114 ms

Resources Loaded

312 ms

Page Rendered

170 ms

vlib.us screenshot

About Website

Welcome to vlib.us homepage info - get ready to check VL Ib best content for United States right away, or after learning these important things about vlib.us

Directory of the Virtual Libraries at www.vlib.us, including WWW-VL: The American West, Old West Kansas, Medical Front WWI, WWW-VL: Age of Jackson, the Mountain Plains Museums Association Technology C...

Visit vlib.us

Key Findings

We analyzed Vlib.us page load time and found that the first response time was 114 ms and then it took 482 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

vlib.us performance score

100

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value0.9 s

100/100

10%

LCP (Largest Contentful Paint)

Value1.4 s

100/100

25%

SI (Speed Index)

Value0.9 s

100/100

10%

TBT (Total Blocking Time)

Value30 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value1.9 s

100/100

10%

Network Requests Diagram

vlib.us

114 ms

VL.css

41 ms

amdocs.gif

157 ms

opte.org.jpg

94 ms

www.gif

27 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that all of those requests were addressed to Vlib.us and no external sources were called. The less responsive or slowest element that took the longest time to load (157 ms) belongs to the original domain Vlib.us.

Page Optimization Overview & Recommendations

Page size can be reduced by 48.9 kB (23%)

Content Size

216.0 kB

After Optimization

167.0 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Vlib.us main page is 216.0 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. Images take 198.2 kB which makes up the majority of the site volume.

HTML Optimization

-74%

Potential reduce by 11.4 kB

  • Original 15.4 kB
  • After minification 14.8 kB
  • After compression 4.0 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 11.4 kB or 74% of the original size.

Image Optimization

-18%

Potential reduce by 35.9 kB

  • Original 198.2 kB
  • After minification 162.3 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, VL Ib needs image optimization as it can save up to 35.9 kB or 18% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-72%

Potential reduce by 1.7 kB

  • Original 2.4 kB
  • After minification 1.9 kB
  • After compression 669 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. Vlib.us needs all CSS files to be minified and compressed as it can save up to 1.7 kB or 72% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

7

After Optimization

7

  • Images
  • CSS

The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of VL Ib. According to our analytics all requests are already optimized.

Network Requests Diagram

vlib.us

vlib.us

114 ms

VL.css

VL.css

41 ms

amdocs.gif

amdocs.gif

157 ms

opte.org.jpg

opte.org.jpg

94 ms

www.gif

www.gif

27 ms

history.gif

history.gif

38 ms

masthd-m.gif

masthd-m.gif

40 ms

heritage.gif

heritage.gif

56 ms

Accessibility Review

vlib.us accessibility score

96

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Best Practices

vlib.us best practices score

58

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

vlib.us SEO score

75

Search Engine Optimization Advices

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Vlib.us 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 Vlib.us main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

vlib.us

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