Tools & Wizards About Us
charlesriverlabs.com screenshot

Report Summary

  • 44

    Performance

    Renders faster than
    63% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 98

    SEO

    Google-friendlier than
    92% of websites

charlesriverlabs.com

Charles River Laboratories | Every Step of the Way.

Page Load Speed

1.2 sec in total

First Response

44 ms

Resources Loaded

728 ms

Page Rendered

461 ms

charlesriverlabs.com screenshot

About Website

Click here to check amazing Charles River Labs content for United States. Otherwise, check out these important facts you probably never knew about charlesriverlabs.com

Charles River provides products and services to help expedite the discovery, early-stage development and safe manufacture of novel drugs and therapeutics.

Visit charlesriverlabs.com

Key Findings

We analyzed Charlesriverlabs.com page load time and found that the first response time was 44 ms and then it took 1.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

charlesriverlabs.com performance score

44

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.7 s

62/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

80/100

25%

SI (Speed Index)

Value9.1 s

14/100

10%

TBT (Total Blocking Time)

Value2,280 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value20.8 s

2/100

10%

Network Requests Diagram

charlesriverlabs.com

44 ms

charlesriverlabs.com

195 ms

www.criver.com

134 ms

628765f20b848f76.css

48 ms

polyfills-78c92fac7aa8fdd8.js

119 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 4% of them (2 requests) were addressed to the original Charlesriverlabs.com, 39% (22 requests) were made to Criver.com and 30% (17 requests) were made to Criver.widen.net. The less responsive or slowest element that took the longest time to load (250 ms) relates to the external source Criver.widen.net.

Page Optimization Overview & Recommendations

Page size can be reduced by 813.1 kB (10%)

Content Size

8.0 MB

After Optimization

7.2 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Charlesriverlabs.com main page is 8.0 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. Only a small number of websites need less resources to load. Images take 6.6 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 535.7 kB

  • Original 626.6 kB
  • After minification 626.6 kB
  • After compression 90.9 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 535.7 kB or 85% of the original size.

Image Optimization

-4%

Potential reduce by 272.4 kB

  • Original 6.6 MB
  • After minification 6.4 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. Charles River Labs images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 4.9 kB

  • Original 719.4 kB
  • After minification 719.4 kB
  • After compression 714.5 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

-1%

Potential reduce by 125 B

  • Original 8.7 kB
  • After minification 8.7 kB
  • After compression 8.6 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. Charlesriverlabs.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 27 (50%)

Requests Now

54

After Optimization

27

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 54 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Charles River Labs. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 28 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

charlesriverlabs.com

charlesriverlabs.com

44 ms

charlesriverlabs.com

charlesriverlabs.com

195 ms

www.criver.com

www.criver.com

134 ms

628765f20b848f76.css

628765f20b848f76.css

48 ms

polyfills-78c92fac7aa8fdd8.js

polyfills-78c92fac7aa8fdd8.js

119 ms

once.min.js

once.min.js

135 ms

jquery.min.js

jquery.min.js

133 ms

crlAnalytics.js

crlAnalytics.js

39 ms

crlAnalyticsNewMenu.js

crlAnalyticsNewMenu.js

119 ms

crlAnalyticsMcp.js

crlAnalyticsMcp.js

144 ms

webpack-62c02dad1a6a4cb4.js

webpack-62c02dad1a6a4cb4.js

153 ms

framework-ecc4130bc7a58a64.js

framework-ecc4130bc7a58a64.js

153 ms

main-464365b1f754581b.js

main-464365b1f754581b.js

158 ms

_app-bb97cf9378363b10.js

_app-bb97cf9378363b10.js

164 ms

78e521c3-f1d120c9a4138047.js

78e521c3-f1d120c9a4138047.js

158 ms

202-db69d5fea9575e62.js

202-db69d5fea9575e62.js

158 ms

470-6dd232fb9e5ba616.js

470-6dd232fb9e5ba616.js

211 ms

index-5fa9e0f1208b8732.js

index-5fa9e0f1208b8732.js

211 ms

_buildManifest.js

_buildManifest.js

210 ms

_ssgManifest.js

_ssgManifest.js

211 ms

vcd15cbe7772f49c399c6a5babf22c1241717689176015

vcd15cbe7772f49c399c6a5babf22c1241717689176015

124 ms

tags.js

tags.js

112 ms

IS_100623_013.jpg

IS_100623_013.jpg

165 ms

MgYxa9Ws8SaHZgPzPoR9Rg

MgYxa9Ws8SaHZgPzPoR9Rg

161 ms

CR-23-June-Pride-Month-003.jpg

CR-23-June-Pride-Month-003.jpg

138 ms

iStock-1668247346.jpg

iStock-1668247346.jpg

123 ms

CR-VS-S05-E10-image.jpeg

CR-VS-S05-E10-image.jpeg

143 ms

CGT-121422-0102.jpg

CGT-121422-0102.jpg

142 ms

CGT-102722-0158.jpg

CGT-102722-0158.jpg

121 ms

CS-121522-116.jpg

CS-121522-116.jpg

124 ms

DS-graphic-neurons.png

DS-graphic-neurons.png

194 ms

iStock-898347682.jpg

iStock-898347682.jpg

250 ms

BI_2024_biotech_symposium.jpg

BI_2024_biotech_symposium.jpg

171 ms

iStock-1133973085.jpg

iStock-1133973085.jpg

203 ms

GE-000260.jpg

GE-000260.jpg

222 ms

DS-072623-055.jpg

DS-072623-055.jpg

179 ms

SA-002960.jpg

SA-002960.jpg

202 ms

SA-002968.jpg

SA-002968.jpg

211 ms

MS-002315.jpg

MS-002315.jpg

210 ms

SA-000899.jpg

SA-000899.jpg

213 ms

featured-content-bg.svg

featured-content-bg.svg

94 ms

www.criver.com

www.criver.com

172 ms

EMPQ-Mandate_1114x500.gif

EMPQ-Mandate_1114x500.gif

138 ms

logo-white.svg

logo-white.svg

122 ms

40 ms

runtime~main-673d70cb759be2d5742b369e690eff73.js

runtime~main-673d70cb759be2d5742b369e690eff73.js

23 ms

main-ab1683751ceb5311c459312f0eb3d545.js

main-ab1683751ceb5311c459312f0eb3d545.js

24 ms

MgYxa9Ws8SaHZgPzPoR9Rg.json

MgYxa9Ws8SaHZgPzPoR9Rg.json

7 ms

vendors~access-code~player~polyfills~unreleased-b17f5f35d7830a75324ee1cd5b5c535b.js

vendors~access-code~player~polyfills~unreleased-b17f5f35d7830a75324ee1cd5b5c535b.js

10 ms

vendors~polyfills-26b29ef8dcf6e3daff35192d8b759182.js

vendors~polyfills-26b29ef8dcf6e3daff35192d8b759182.js

9 ms

polyfills-6534f407863705c711261d154c220e15.js

polyfills-6534f407863705c711261d154c220e15.js

15 ms

vendors~player~player-pomo~unreleased-a6e8ad61b8e4d06cd1a2ebf36ee81e20.js

vendors~player~player-pomo~unreleased-a6e8ad61b8e4d06cd1a2ebf36ee81e20.js

9 ms

vendors~access-code~player-pomo~whitelisted-embed-06b5f9ded2fe0065e32a795e40e9cab7.js

vendors~access-code~player-pomo~whitelisted-embed-06b5f9ded2fe0065e32a795e40e9cab7.js

5 ms

vendors~player-pomo-06e36a03641345933819d02c12e5b33b.js

vendors~player-pomo-06e36a03641345933819d02c12e5b33b.js

13 ms

player-pomo-6a44004ddd8cc38b85c6c18986c805e8.css

player-pomo-6a44004ddd8cc38b85c6c18986c805e8.css

9 ms

player-pomo-6a44004ddd8cc38b85c6c18986c805e8.js

player-pomo-6a44004ddd8cc38b85c6c18986c805e8.js

22 ms

error-page-82554406c600e58fb4ab73976372569d.js

error-page-82554406c600e58fb4ab73976372569d.js

9 ms

Accessibility Review

charlesriverlabs.com accessibility score

91

Accessibility Issues

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

Buttons do not have an accessible name

High

Links do not have a discernible name

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

Best Practices

charlesriverlabs.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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

charlesriverlabs.com SEO score

98

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

High

Tap targets are not sized appropriately

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 Charlesriverlabs.com 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 Charlesriverlabs.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

charlesriverlabs.com

Open Graph description is not detected on the main page of Charles River Labs. 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: