Tools & Wizards About Us
digitalpreservation.gov screenshot

Report Summary

  • 93

    Performance

    Renders faster than
    92% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 62% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 75

    SEO

    Google-friendlier than
    32% of websites

digitalpreservation.gov

Digital Preservation (Library of Congress)

Page Load Speed

3.5 sec in total

First Response

1.6 sec

Resources Loaded

1.7 sec

Page Rendered

157 ms

digitalpreservation.gov screenshot

About Website

Welcome to digitalpreservation.gov homepage info - get ready to check Digital Preservation best content for United States right away, or after learning these important things about digitalpreservation.gov

The Library of Congress and its digital preservation partners from the federal, library, creative, publishing, technology, and copyright communities are working to develop a national strategy to colle...

Visit digitalpreservation.gov

Key Findings

We analyzed Digitalpreservation.gov page load time and found that the first response time was 1.6 sec and then it took 1.9 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 35% of websites can load faster.

Performance Metrics

digitalpreservation.gov performance score

93

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.2 s

77/100

10%

LCP (Largest Contentful Paint)

Value2.6 s

88/100

25%

SI (Speed Index)

Value2.3 s

99/100

10%

TBT (Total Blocking Time)

Value110 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0.006

100/100

15%

TTI (Time to Interactive)

Value3.9 s

88/100

10%

Network Requests Diagram

digitalpreservation.gov

1573 ms

styles.css

18 ms

loc_print_v2.css

53 ms

digital-preservation.js

22 ms

modernizr-1.5.min.js

20 ms

Our browser made a total of 51 requests to load all elements on the main page. We found that 27% of them (14 requests) were addressed to the original Digitalpreservation.gov, 57% (29 requests) were made to Cdn.loc.gov and 12% (6 requests) were made to Loc.gov. The less responsive or slowest element that took the longest time to load (1.6 sec) belongs to the original domain Digitalpreservation.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 138.9 kB (28%)

Content Size

489.7 kB

After Optimization

350.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Digitalpreservation.gov main page is 489.7 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 253.5 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 17.1 kB

  • Original 23.8 kB
  • After minification 20.0 kB
  • After compression 6.7 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. This page needs HTML code to be minified as it can gain 3.8 kB, which is 16% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 17.1 kB or 72% of the original size.

Image Optimization

-10%

Potential reduce by 18.2 kB

  • Original 173.4 kB
  • After minification 155.2 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. Digital Preservation images are well optimized though.

JavaScript Optimization

-32%

Potential reduce by 80.6 kB

  • Original 253.5 kB
  • After minification 249.5 kB
  • After compression 172.9 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 80.6 kB or 32% of the original size.

CSS Optimization

-59%

Potential reduce by 23.1 kB

  • Original 39.1 kB
  • After minification 33.0 kB
  • After compression 16.0 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. Digitalpreservation.gov needs all CSS files to be minified and compressed as it can save up to 23.1 kB or 59% of the original size.

Requests Breakdown

Number of requests can be reduced by 31 (63%)

Requests Now

49

After Optimization

18

  • Images
  • JavaScript
  • CSS

The browser has sent 49 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Digital Preservation. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 13 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

digitalpreservation.gov

digitalpreservation.gov

1573 ms

styles.css

styles.css

18 ms

loc_print_v2.css

loc_print_v2.css

53 ms

digital-preservation.js

digital-preservation.js

22 ms

modernizr-1.5.min.js

modernizr-1.5.min.js

20 ms

library-of-congress.js

library-of-congress.js

10 ms

loc_reset_v2.css

loc_reset_v2.css

35 ms

lochead.css

lochead.css

6 ms

locfoot.css

locfoot.css

8 ms

loc_standard_v2_w.css

loc_standard_v2_w.css

54 ms

digitalpreservation.css

digitalpreservation.css

11 ms

img_lochead.png

img_lochead.png

522 ms

leftnav_head.jpg

leftnav_head.jpg

15 ms

left_nav.jpg

left_nav.jpg

31 ms

main_banner.jpg

main_banner.jpg

34 ms

stewardship_thumb.jpg

stewardship_thumb.jpg

32 ms

personal_memories_thumb.jpg

personal_memories_thumb.jpg

69 ms

DPOE-thumb.png

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113 ms

meetings_thumb.jpg

meetings_thumb.jpg

158 ms

viewshare_thumb.jpg

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159 ms

webarchive_thumb.jpg

webarchive_thumb.jpg

165 ms

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NDSR_thumb.jpg

164 ms

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7 ms

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i_arrow_o.gif

66 ms

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i_arrow.gif

68 ms

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69 ms

LAB-2.0.3.min.js

LAB-2.0.3.min.js

6 ms

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jquery.ui.all-min.css

jquery.ui.all-min.css

10 ms

share-1.9.15.min.css

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14 ms

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20 ms

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Accessibility Review

digitalpreservation.gov accessibility score

86

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[accesskey] values are not unique

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.

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

Form elements do not have associated labels

Best Practices

digitalpreservation.gov 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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

digitalpreservation.gov SEO score

75

Search Engine Optimization Advices

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 Digitalpreservation.gov 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 Digitalpreservation.gov 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

digitalpreservation.gov

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