Tools & Wizards About Us
history.nih.gov screenshot

Report Summary

  • 24

    Performance

    Renders faster than
    43% of other websites

  • 98

    Accessibility

    Visual factors better than
    that of 94% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

history.nih.gov

Home - Office of NIH History and Stetten Museum

Page Load Speed

1.6 sec in total

First Response

18 ms

Resources Loaded

941 ms

Page Rendered

649 ms

history.nih.gov screenshot

About Website

Visit history.nih.gov now to see the best up-to-date History NIH content for China and also check out these interesting facts you probably never knew about history.nih.gov

Visit history.nih.gov

Key Findings

We analyzed History.nih.gov page load time and found that the first response time was 18 ms and then it took 1.6 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

history.nih.gov performance score

24

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.2 s

1/100

10%

LCP (Largest Contentful Paint)

Value26.3 s

0/100

25%

SI (Speed Index)

Value7.2 s

30/100

10%

TBT (Total Blocking Time)

Value1,260 ms

19/100

30%

CLS (Cumulative Layout Shift)

Value0.004

100/100

15%

TTI (Time to Interactive)

Value44.9 s

0/100

10%

Network Requests Diagram

history.nih.gov

18 ms

history.nih.gov

368 ms

batch.css

34 ms

batch.css

46 ms

com.adaptavist.confluence.theme.engine:layout-fixes.css

30 ms

Our browser made a total of 66 requests to load all elements on the main page. We found that 89% of them (59 requests) were addressed to the original History.nih.gov, 6% (4 requests) were made to Search.usa.gov and 2% (1 request) were made to Dap.digitalgov.gov. The less responsive or slowest element that took the longest time to load (368 ms) belongs to the original domain History.nih.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 769.3 kB (7%)

Content Size

10.6 MB

After Optimization

9.8 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of History.nih.gov main page is 10.6 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. 60% of websites need less resources to load. Images take 10.4 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 66.9 kB

  • Original 82.1 kB
  • After minification 70.7 kB
  • After compression 15.3 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. This page needs HTML code to be minified as it can gain 11.4 kB, which is 14% 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 66.9 kB or 81% of the original size.

Image Optimization

-7%

Potential reduce by 691.5 kB

  • Original 10.4 MB
  • After minification 9.7 MB

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. History NIH images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 110 B

  • Original 62.1 kB
  • After minification 62.1 kB
  • After compression 62.0 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. This website has mostly compressed JavaScripts.

CSS Optimization

-15%

Potential reduce by 10.9 kB

  • Original 71.3 kB
  • After minification 71.2 kB
  • After compression 60.4 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. History.nih.gov needs all CSS files to be minified and compressed as it can save up to 10.9 kB or 15% of the original size.

Requests Breakdown

Number of requests can be reduced by 29 (58%)

Requests Now

50

After Optimization

21

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 50 CSS, Javascripts, AJAX and image requests in order to completely render the main page of History NIH. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 9 to 1 for JavaScripts and from 16 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

history.nih.gov

history.nih.gov

18 ms

history.nih.gov

history.nih.gov

368 ms

batch.css

batch.css

34 ms

batch.css

batch.css

46 ms

com.adaptavist.confluence.theme.engine:layout-fixes.css

com.adaptavist.confluence.theme.engine:layout-fixes.css

30 ms

colors.css

colors.css

44 ms

batch.js

batch.js

107 ms

batch.js

batch.js

76 ms

com.adaptavist.confluence.theme.engine:tb-helper.js

com.adaptavist.confluence.theme.engine:tb-helper.js

59 ms

theme-resources.action

theme-resources.action

73 ms

theme-resources.action

theme-resources.action

55 ms

theme-resources.action

theme-resources.action

61 ms

Universal-Federated-Analytics-Min.js

Universal-Federated-Analytics-Min.js

15 ms

uswds.min.js

uswds.min.js

73 ms

stop-crawler-page-history.js

stop-crawler-page-history.js

69 ms

imageMapResizer.min.js

imageMapResizer.min.js

189 ms

uswds.css

uswds.css

27 ms

augmented.css

augmented.css

14 ms

hamburger2and_sticky-toc.css

hamburger2and_sticky-toc.css

18 ms

hamburger.css

hamburger.css

13 ms

card.css

card.css

19 ms

chevron.css

chevron.css

36 ms

oswald.css

oswald.css

36 ms

judson.css

judson.css

38 ms

roboto.css

roboto.css

36 ms

remote.loader.js

remote.loader.js

24 ms

hhs.png

hhs.png

10 ms

external-link.svg

external-link.svg

16 ms

nih_history_master_logo_2color-2x.png

nih_history_master_logo_2color-2x.png

18 ms

close.svg

close.svg

14 ms

angle-arrow-down-white.svg

angle-arrow-down-white.svg

15 ms

nci-vol-2241-300-straight.jpg

nci-vol-2241-300-straight.jpg

53 ms

02-the%20Nirenberg%20exhibit-close%20up%20of%20Dr.%20Philip%20Leder-2-sq.jpg

02-the%20Nirenberg%20exhibit-close%20up%20of%20Dr.%20Philip%20Leder-2-sq.jpg

134 ms

Archives-banner-sq.png

Archives-banner-sq.png

125 ms

fdr-nih.png

fdr-nih.png

168 ms

Cover.png

Cover.png

65 ms

1999-07-14%20%20Hannaway%20Caroline%20Melbourne%20Australia.jpg

1999-07-14%20%20Hannaway%20Caroline%20Melbourne%20Australia.jpg

36 ms

michele-behind-the-mask-0339-sq.jpg

michele-behind-the-mask-0339-sq.jpg

54 ms

Blanket%20Wrap%20Zerhouni.jpg

Blanket%20Wrap%20Zerhouni.jpg

124 ms

facebook25.png

facebook25.png

123 ms

flickr-icon.png

flickr-icon.png

124 ms

twitter16.png

twitter16.png

126 ms

blue-arrow-01.svg

blue-arrow-01.svg

125 ms

NIH_History_Master_Logo_2Color-white.png

NIH_History_Master_Logo_2Color-white.png

126 ms

facebook25-w.svg

facebook25-w.svg

128 ms

twitter16-w.svg

twitter16-w.svg

127 ms

flickr-icon-w.svg

flickr-icon-w.svg

129 ms

address.svg

address.svg

127 ms

phone-numbers.svg

phone-numbers.svg

129 ms

email-address.svg

email-address.svg

129 ms

sourcesanspro-regular-webfont.woff

sourcesanspro-regular-webfont.woff

217 ms

sourcesanspro-light-webfont.woff

sourcesanspro-light-webfont.woff

132 ms

sourcesanspro-bold-webfont.woff

sourcesanspro-bold-webfont.woff

162 ms

sayt_loader.js

sayt_loader.js

7 ms

sayt.css

sayt.css

8 ms

sayt_loader_libs.js

sayt_loader_libs.js

28 ms

sourcesanspro-italic-webfont.woff

sourcesanspro-italic-webfont.woff

31 ms

sourcesanspro-lightitalic-webfont.woff

sourcesanspro-lightitalic-webfont.woff

102 ms

sourcesanspro-bolditalic-webfont.woff

sourcesanspro-bolditalic-webfont.woff

31 ms

Latin-Merriweather-Regular.woff

Latin-Merriweather-Regular.woff

30 ms

Latin-Merriweather-Light.woff

Latin-Merriweather-Light.woff

66 ms

Latin-Merriweather-Bold.woff

Latin-Merriweather-Bold.woff

66 ms

ui-bg_flat_75_ffffff_40x100.png

ui-bg_flat_75_ffffff_40x100.png

43 ms

sourcesanspro-regular-webfont.ttf

sourcesanspro-regular-webfont.ttf

113 ms

search-error

search-error

22 ms

sourcesanspro-lightitalic-webfont.ttf

sourcesanspro-lightitalic-webfont.ttf

108 ms

Accessibility Review

history.nih.gov accessibility score

98

Accessibility Issues

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.

Best Practices

history.nih.gov 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

Serves images with low resolution

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

history.nih.gov SEO score

85

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

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

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 History.nih.gov 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 History.nih.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

history.nih.gov

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