Tools & Wizards About Us
pubmed.gov screenshot

Report Summary

  • 90

    Performance

    Renders faster than
    91% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 90

    SEO

    Google-friendlier than
    68% of websites

pubmed.gov

PubMed

Page Load Speed

640 ms in total

First Response

14 ms

Resources Loaded

446 ms

Page Rendered

180 ms

pubmed.gov screenshot

About Website

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

PubMed® comprises more than 37 million citations for biomedical literature from MEDLINE, life science journals, and online books. Citations may include links to full text content from PubMed Central a...

Visit pubmed.gov

Key Findings

We analyzed Pubmed.gov page load time and found that the first response time was 14 ms and then it took 626 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

pubmed.gov performance score

90

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

71/100

25%

SI (Speed Index)

Value2.3 s

98/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.3 s

99/100

10%

Network Requests Diagram

pubmed.gov

14 ms

pubmed.ncbi.nlm.nih.gov

76 ms

output.5ecf62baa0fa.css

97 ms

output.452c70ce66f7.css

100 ms

output.97c300a159d1.css

103 ms

Our browser made a total of 23 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original Pubmed.gov, 70% (16 requests) were made to Cdn.ncbi.nlm.nih.gov and 17% (4 requests) were made to Ncbi.nlm.nih.gov. The less responsive or slowest element that took the longest time to load (175 ms) relates to the external source Cdn.ncbi.nlm.nih.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 32.6 kB (14%)

Content Size

228.1 kB

After Optimization

195.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Pubmed.gov main page is 228.1 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. 35% of websites need less resources to load. Javascripts take 155.4 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 32.4 kB

  • Original 42.2 kB
  • After minification 35.0 kB
  • After compression 9.7 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 7.2 kB, which is 17% 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 32.4 kB or 77% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 521 B
  • After minification 521 B

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. Pub Med images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 155.4 kB
  • After minification 155.4 kB
  • After compression 155.4 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

-0%

Potential reduce by 74 B

  • Original 29.9 kB
  • After minification 29.9 kB
  • After compression 29.8 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. Pubmed.gov has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 7 (37%)

Requests Now

19

After Optimization

12

  • Images
  • JavaScript
  • CSS

The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Pub Med. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 4 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

pubmed.gov

pubmed.gov

14 ms

pubmed.ncbi.nlm.nih.gov

pubmed.ncbi.nlm.nih.gov

76 ms

output.5ecf62baa0fa.css

output.5ecf62baa0fa.css

97 ms

output.452c70ce66f7.css

output.452c70ce66f7.css

100 ms

output.97c300a159d1.css

output.97c300a159d1.css

103 ms

output.2cde99070af0.css

output.2cde99070af0.css

105 ms

favicon-57.png

favicon-57.png

25 ms

output.293fbf76aa18.js

output.293fbf76aa18.js

130 ms

output.647e421b50d4.js

output.647e421b50d4.js

127 ms

pinger.js

pinger.js

129 ms

output.248cdf917d10.js

output.248cdf917d10.js

129 ms

pubmed-logo-white.svg

pubmed-logo-white.svg

126 ms

icon-dot-gov.svg

icon-dot-gov.svg

25 ms

icon-https.svg

icon-https.svg

32 ms

AgencyLogo.svg

AgencyLogo.svg

39 ms

homepage-background.svg

homepage-background.svg

154 ms

learn.svg

learn.svg

174 ms

find.svg

find.svg

172 ms

download-home-illustration.svg

download-home-illustration.svg

156 ms

explore.svg

explore.svg

175 ms

analytics.js

analytics.js

42 ms

merriweather-bold-webfont.woff

merriweather-bold-webfont.woff

48 ms

merriweather-regular-webfont.woff

merriweather-regular-webfont.woff

63 ms

Accessibility Review

pubmed.gov accessibility score

100

Accessibility Issues

Best Practices

pubmed.gov best practices score

92

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

Page has valid source maps

SEO Factors

pubmed.gov SEO score

90

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

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 Pubmed.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 Pubmed.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

pubmed.gov

Open Graph data is detected on the main page of Pub Med. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: