Tools & Wizards About Us
merckmanuals.com screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 93

    SEO

    Google-friendlier than
    83% of websites

merckmanuals.com

The Trusted Provider of Medical Information since 1899

Page Load Speed

1 sec in total

First Response

58 ms

Resources Loaded

752 ms

Page Rendered

221 ms

merckmanuals.com screenshot

About Website

Visit merckmanuals.com now to see the best up-to-date Merckmanuals content for United States and also check out these interesting facts you probably never knew about merckmanuals.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 merckmanuals.com

Key Findings

We analyzed Merckmanuals.com page load time and found that the first response time was 58 ms and then it took 973 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

merckmanuals.com performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.5 s

15/100

10%

LCP (Largest Contentful Paint)

Value8.2 s

2/100

25%

SI (Speed Index)

Value6.4 s

41/100

10%

TBT (Total Blocking Time)

Value1,340 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.043

99/100

15%

TTI (Time to Interactive)

Value10.1 s

26/100

10%

Network Requests Diagram

merckmanuals.com

58 ms

www.merckmanuals.com

216 ms

libsjsv37

58 ms

merckjsv37

9 ms

landingcssv37

17 ms

Our browser made a total of 40 requests to load all elements on the main page. We found that 70% of them (28 requests) were addressed to the original Merckmanuals.com, 10% (4 requests) were made to Privacy-policy.truste.com and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (216 ms) belongs to the original domain Merckmanuals.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 117.0 kB (23%)

Content Size

512.9 kB

After Optimization

395.9 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Merckmanuals.com main page is 512.9 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. 65% of websites need less resources to load. Images take 353.6 kB which makes up the majority of the site volume.

HTML Optimization

-69%

Potential reduce by 22.1 kB

  • Original 32.3 kB
  • After minification 30.8 kB
  • After compression 10.2 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 22.1 kB or 69% of the original size.

Image Optimization

-4%

Potential reduce by 15.1 kB

  • Original 353.6 kB
  • After minification 338.5 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. Merckmanuals images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 79.8 kB

  • Original 127.0 kB
  • After minification 96.7 kB
  • After compression 47.3 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 79.8 kB or 63% of the original size.

Requests Breakdown

Number of requests can be reduced by 8 (31%)

Requests Now

26

After Optimization

18

  • Images
  • JavaScript
  • CSS

The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Merckmanuals. 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 as a result speed up the page load time.

Network Requests Diagram

merckmanuals.com

merckmanuals.com

58 ms

www.merckmanuals.com

www.merckmanuals.com

216 ms

libsjsv37

libsjsv37

58 ms

merckjsv37

merckjsv37

9 ms

landingcssv37

landingcssv37

17 ms

asc

asc

4 ms

asc

asc

5 ms

script.js

script.js

9 ms

slick.js

slick.js

11 ms

edition-switch.js

edition-switch.js

6 ms

gtm.js

gtm.js

96 ms

seal

seal

87 ms

seal

seal

17 ms

MM_langing_logo.png

MM_langing_logo.png

19 ms

merck_foot_logo.png

merck_foot_logo.png

17 ms

globe.png

globe.png

18 ms

pro_landing_desktop.jpg

pro_landing_desktop.jpg

18 ms

merck_logo_horiz.png

merck_logo_horiz.png

20 ms

home_landing_desktop.jpg

home_landing_desktop.jpg

62 ms

merck_logo_horiz.png

merck_logo_horiz.png

19 ms

mm_global.png

mm_global.png

65 ms

teblet-zestoopki.png

teblet-zestoopki.png

62 ms

mm_micro_logo.png

mm_micro_logo.png

60 ms

select-icons.png

select-icons.png

63 ms

OpenSans-Regular-webfont.woff

OpenSans-Regular-webfont.woff

61 ms

OpenSans-Light-webfont.woff

OpenSans-Light-webfont.woff

63 ms

OpenSans-Bold-webfont.woff

OpenSans-Bold-webfont.woff

66 ms

OpenSans-Regular.ttf

OpenSans-Regular.ttf

108 ms

OpenSans-Light.ttf

OpenSans-Light.ttf

66 ms

OpenSans-Bold.ttf

OpenSans-Bold.ttf

64 ms

BlockGothicRR_BoldCond-webfont.woff

BlockGothicRR_BoldCond-webfont.woff

62 ms

2CA0D6_0_0.woff

2CA0D6_0_0.woff

62 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

62 ms

analytics.js

analytics.js

46 ms

trackpxl

trackpxl

82 ms

prum.min.js

prum.min.js

17 ms

collect

collect

13 ms

collect

collect

59 ms

ga-audiences

ga-audiences

34 ms

nr-852.min.js

nr-852.min.js

44 ms

Accessibility Review

merckmanuals.com accessibility score

100

Accessibility Issues

Best Practices

merckmanuals.com best practices score

83

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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

merckmanuals.com SEO score

93

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 Merckmanuals.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 Merckmanuals.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

merckmanuals.com

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