Tools & Wizards About Us
merckmanual.com screenshot

Report Summary

  • 59

    Performance

    Renders faster than
    74% 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

  • 100

    SEO

    Google-friendlier than
    94% of websites

merckmanual.com

The Trusted Provider of Medical Information since 1899

Page Load Speed

6.5 sec in total

First Response

481 ms

Resources Loaded

5.8 sec

Page Rendered

152 ms

merckmanual.com screenshot

About Website

Welcome to merckmanual.com homepage info - get ready to check Merckmanual best content right away, or after learning these important things about merckmanual.com

The Merck Manuals (known as the MSD Manuals outside US & Canada) are the global standard in medical reference for Doctors, Students & Consumers - since 1899.

Visit merckmanual.com

Key Findings

We analyzed Merckmanual.com page load time and found that the first response time was 481 ms and then it took 6 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.

Performance Metrics

merckmanual.com performance score

59

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

59/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

46/100

25%

SI (Speed Index)

Value4.6 s

71/100

10%

TBT (Total Blocking Time)

Value540 ms

54/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value9.1 s

33/100

10%

Network Requests Diagram

merckmanual.com

481 ms

www.merckmanuals.com

28 ms

otSDKStub.js

49 ms

770c706046657fae.css

13 ms

b06a1296967a6d2a.css

25 ms

Our browser made a total of 48 requests to load all elements on the main page. We found that 2% of them (1 request) were addressed to the original Merckmanual.com, 73% (35 requests) were made to Merckmanuals.com and 13% (6 requests) were made to Cdn.cookielaw.org. The less responsive or slowest element that took the longest time to load (5 sec) relates to the external source Merckmanuals.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 139.4 kB (42%)

Content Size

335.5 kB

After Optimization

196.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Merckmanual.com main page is 335.5 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. HTML takes 166.0 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 138.2 kB

  • Original 166.0 kB
  • After minification 165.8 kB
  • After compression 27.7 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. 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 138.2 kB or 83% of the original size.

Image Optimization

-3%

Potential reduce by 1.1 kB

  • Original 35.1 kB
  • After minification 34.0 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. Merckmanual images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 57 B

  • Original 130.7 kB
  • After minification 130.7 kB
  • After compression 130.6 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 0 B

  • Original 3.7 kB
  • After minification 3.7 kB
  • After compression 3.7 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. Merckmanual.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 23 (66%)

Requests Now

35

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 35 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Merckmanual. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

merckmanual.com

merckmanual.com

481 ms

www.merckmanuals.com

www.merckmanuals.com

28 ms

otSDKStub.js

otSDKStub.js

49 ms

770c706046657fae.css

770c706046657fae.css

13 ms

b06a1296967a6d2a.css

b06a1296967a6d2a.css

25 ms

31f4e63b525786b1.css

31f4e63b525786b1.css

23 ms

57ae91f4aa6439e2.css

57ae91f4aa6439e2.css

26 ms

polyfills-c67a75d1b6f99dc8.js

polyfills-c67a75d1b6f99dc8.js

35 ms

webpack-88889a1a4088ba8d.js

webpack-88889a1a4088ba8d.js

26 ms

framework-09f3afa64952aba4.js

framework-09f3afa64952aba4.js

29 ms

main-38bd17947d60bbae.js

main-38bd17947d60bbae.js

34 ms

_app-da31a3f086fde0bf.js

_app-da31a3f086fde0bf.js

34 ms

bootstrap-d927426da4d0ff9b.js

bootstrap-d927426da4d0ff9b.js

34 ms

sitecorejss-12a18ba121c3474b.js

sitecorejss-12a18ba121c3474b.js

35 ms

languageSwitcher-4f8b774a7862f2a8.js

languageSwitcher-4f8b774a7862f2a8.js

34 ms

popperjs-3eda6bd9f334dc9f.js

popperjs-3eda6bd9f334dc9f.js

39 ms

axios-d1d943084f2672bb.js

axios-d1d943084f2672bb.js

37 ms

2327-d0758751f00320bc.js

2327-d0758751f00320bc.js

38 ms

8653-6793f927a868fe55.js

8653-6793f927a868fe55.js

39 ms

9176-d8029ee8b0bfbf3f.js

9176-d8029ee8b0bfbf3f.js

39 ms

index-3ff54db48bf1bf17.js

index-3ff54db48bf1bf17.js

36 ms

_buildManifest.js

_buildManifest.js

39 ms

_ssgManifest.js

_ssgManifest.js

39 ms

landing_header_mobile.png

landing_header_mobile.png

146 ms

mm_logo.svg

mm_logo.svg

317 ms

social_round_facebook.svg

social_round_facebook.svg

318 ms

social_round_twitter.svg

social_round_twitter.svg

192 ms

social_round_youtube.svg

social_round_youtube.svg

210 ms

dark-theme-ico.8a3035df.svg

dark-theme-ico.8a3035df.svg

67 ms

quicklinks_arrow_right_white.30c43e90.png

quicklinks_arrow_right_white.30c43e90.png

128 ms

icon_home_downarrow.1f5e17c5.png

icon_home_downarrow.1f5e17c5.png

360 ms

cdf719dd-b370-4246-9b13-840b56be970d.json

cdf719dd-b370-4246-9b13-840b56be970d.json

46 ms

location

location

45 ms

otBannerSdk.js

otBannerSdk.js

19 ms

en.json

en.json

30 ms

otCenterRounded.json

otCenterRounded.json

16 ms

otCommonStyles.css

otCommonStyles.css

21 ms

OpenSans-400-Regular.woff

OpenSans-400-Regular.woff

1381 ms

OpenSans-300-Light.woff

OpenSans-300-Light.woff

2080 ms

OpenSans-600-SemiBold.woff

OpenSans-600-SemiBold.woff

2793 ms

OpenSans-700-Bold.woff

OpenSans-700-Bold.woff

4004 ms

OpenSans-800-ExtraBold.woff

OpenSans-800-ExtraBold.woff

1959 ms

rambla-latin-regular.woff

rambla-latin-regular.woff

2245 ms

OpenSans-400-Regular-Italic.woff

OpenSans-400-Regular-Italic.woff

2745 ms

OpenSans-300-Light-Italic.woff

OpenSans-300-Light-Italic.woff

4994 ms

OpenSans-600-SemiBold-Italic.woff

OpenSans-600-SemiBold-Italic.woff

3636 ms

OpenSans-700-Bold-Italic.woff

OpenSans-700-Bold-Italic.woff

3616 ms

OpenSans-800-ExtraBold-Italic.woff

OpenSans-800-ExtraBold-Italic.woff

4149 ms

Accessibility Review

merckmanual.com accessibility score

100

Accessibility Issues

Best Practices

merckmanual.com 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

SEO Factors

merckmanual.com SEO score

100

Search Engine Optimization Advices

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 Merckmanual.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 Merckmanual.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

merckmanual.com

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