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jbjs.org.uk screenshot

Report Summary

  • 19

    Performance

    Renders faster than
    36% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 39% of websites

  • 0

    Best Practices

  • 77

    SEO

    Google-friendlier than
    36% of websites

jbjs.org.uk

The Journal of Bone and Joint Surgery

Page Load Speed

939 ms in total

First Response

15 ms

Resources Loaded

861 ms

Page Rendered

63 ms

jbjs.org.uk screenshot

About Website

Visit jbjs.org.uk now to see the best up-to-date Jbjs content and also check out these interesting facts you probably never knew about jbjs.org.uk

The Journal of Bone & Joint Surgery (JBJS) is the gold-standard in peer-reviewed scientific information for orthopaedic surgeons. Gain access to over 125 years of all six journals, as well as CME acti...

Visit jbjs.org.uk

Key Findings

We analyzed Jbjs.org.uk page load time and found that the first response time was 15 ms and then it took 924 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Performance Metrics

jbjs.org.uk performance score

19

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value13.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value22.8 s

0/100

25%

SI (Speed Index)

Value16.5 s

0/100

10%

TBT (Total Blocking Time)

Value1,600 ms

12/100

30%

CLS (Cumulative Layout Shift)

Value0.013

100/100

15%

TTI (Time to Interactive)

Value22.1 s

1/100

10%

Network Requests Diagram

jbjs.org.uk

15 ms

www.jbjs.org

30 ms

www.jbjs.org

151 ms

satelliteLib-06ba5172aa541acf1a82f0d4d211850f9c139bc2.js

60 ms

gpt.js

139 ms

Our browser made a total of 101 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original Jbjs.org.uk, 59% (60 requests) were made to Jbjs.org and 8% (8 requests) were made to Static.klaviyo.com. The less responsive or slowest element that took the longest time to load (213 ms) relates to the external source Jbjs.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 87.6 kB (13%)

Content Size

650.9 kB

After Optimization

563.4 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Jbjs.org.uk main page is 650.9 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. 70% of websites need less resources to load. Javascripts take 539.4 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 75.5 kB

  • Original 91.9 kB
  • After minification 91.9 kB
  • After compression 16.4 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 75.5 kB or 82% of the original size.

JavaScript Optimization

-2%

Potential reduce by 9.5 kB

  • Original 539.4 kB
  • After minification 538.3 kB
  • After compression 529.9 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

-13%

Potential reduce by 2.6 kB

  • Original 19.7 kB
  • After minification 19.7 kB
  • After compression 17.1 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. Jbjs.org.uk needs all CSS files to be minified and compressed as it can save up to 2.6 kB or 13% of the original size.

Requests Breakdown

Number of requests can be reduced by 84 (89%)

Requests Now

94

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 94 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jbjs. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 64 to 1 for JavaScripts and from 22 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

jbjs.org.uk

jbjs.org.uk

15 ms

www.jbjs.org

www.jbjs.org

30 ms

www.jbjs.org

www.jbjs.org

151 ms

satelliteLib-06ba5172aa541acf1a82f0d4d211850f9c139bc2.js

satelliteLib-06ba5172aa541acf1a82f0d4d211850f9c139bc2.js

60 ms

gpt.js

gpt.js

139 ms

klaviyo.js

klaviyo.js

43 ms

aag3ekr.js

aag3ekr.js

171 ms

jquery.min.js

jquery.min.js

56 ms

polyfills.js

polyfills.js

21 ms

utils.js

utils.js

30 ms

tooltip.js

tooltip.js

27 ms

url_utils.js

url_utils.js

29 ms

cookie.js

cookie.js

40 ms

modal_window.js

modal_window.js

39 ms

advsearch_modal.js

advsearch_modal.js

40 ms

auth_utils.js

auth_utils.js

39 ms

hotjar.js

hotjar.js

43 ms

msearch.js

msearch.js

42 ms

search_utils.js

search_utils.js

47 ms

favorite.js

favorite.js

47 ms

layout_engine.js

layout_engine.js

134 ms

layout_utils.js

layout_utils.js

47 ms

jquery.autocomplete.min.js

jquery.autocomplete.min.js

52 ms

jquery.mockjax.js

jquery.mockjax.js

51 ms

search-autocomplete.js

search-autocomplete.js

53 ms

monitor.js

monitor.js

53 ms

gtm_utils.js

gtm_utils.js

53 ms

page_listeners.js

page_listeners.js

83 ms

cookie_utils.js

cookie_utils.js

85 ms

notification.js

notification.js

84 ms

tabs.js

tabs.js

83 ms

tiler.js

tiler.js

83 ms

collapse.js

collapse.js

131 ms

waiting_spinner.js

waiting_spinner.js

131 ms

slider-carousel.js

slider-carousel.js

129 ms

ads.js

ads.js

130 ms

mobile_menu.js

mobile_menu.js

131 ms

search.js

search.js

199 ms

popup_utils.js

popup_utils.js

199 ms

share_content.js

share_content.js

199 ms

send_mail.js

send_mail.js

199 ms

myjbjs_settings.js

myjbjs_settings.js

200 ms

register_popup.js

register_popup.js

198 ms

069ea4c0-c84a-0138-2006-06a60fe5fe77

069ea4c0-c84a-0138-2006-06a60fe5fe77

79 ms

notification.css

notification.css

213 ms

tabs.css

tabs.css

203 ms

tiler.css

tiler.css

197 ms

collapse.css

collapse.css

194 ms

waiting_spinner.css

waiting_spinner.css

194 ms

slider-carousel.css

slider-carousel.css

183 ms

properties.css

properties.css

184 ms

common.css

common.css

184 ms

button.css

button.css

186 ms

main.css

main.css

184 ms

menu.css

menu.css

184 ms

autocomplete.css

autocomplete.css

178 ms

search-modal.css

search-modal.css

178 ms

share.css

share.css

178 ms

jbjs_icon.css

jbjs_icon.css

176 ms

modal.css

modal.css

175 ms

send_mail.css

send_mail.css

174 ms

popup.css

popup.css

173 ms

satellite-5efc72a164746d0b6c000000.js

satellite-5efc72a164746d0b6c000000.js

47 ms

gtm.js

gtm.js

200 ms

common_search.css

common_search.css

152 ms

fender_analytics.113876fdc67592e7cbfd.js

fender_analytics.113876fdc67592e7cbfd.js

134 ms

static.047f24ade89e4aff54a9.js

static.047f24ade89e4aff54a9.js

140 ms

runtime.575e76507d014c43b1b9.js

runtime.575e76507d014c43b1b9.js

43 ms

sharedUtils.ef3296608bc2583174d6.js

sharedUtils.ef3296608bc2583174d6.js

118 ms

vendors~signup_forms~post_identification_sync~web_personalization~reviews~atlas.b0930143925bb765e2d3.js

vendors~signup_forms~post_identification_sync~web_personalization~reviews~atlas.b0930143925bb765e2d3.js

118 ms

vendors~signup_forms~onsite-triggering.733ed8744f200f7d4d54.js

vendors~signup_forms~onsite-triggering.733ed8744f200f7d4d54.js

118 ms

vendors~signup_forms.824396622be3ec2234ff.js

vendors~signup_forms.824396622be3ec2234ff.js

125 ms

default~signup_forms~onsite-triggering.968e4cc173bff13b788f.js

default~signup_forms~onsite-triggering.968e4cc173bff13b788f.js

127 ms

signup_forms.ea381fabab056fd7e65a.js

signup_forms.ea381fabab056fd7e65a.js

126 ms

vendors~signup_forms~post_identification_sync~web_personalization~reviews~atlas.b0930143925bb765e2d3.js

vendors~signup_forms~post_identification_sync~web_personalization~reviews~atlas.b0930143925bb765e2d3.js

137 ms

post_identification_sync.9785ea669391d6a8413c.js

post_identification_sync.9785ea669391d6a8413c.js

138 ms

web_personalization.00bb9feb2b5ecb270f40.js

web_personalization.00bb9feb2b5ecb270f40.js

141 ms

myjbjs_settings.css

myjbjs_settings.css

141 ms

advsearch_modal.css

advsearch_modal.css

141 ms

inputs.css

inputs.css

151 ms

home_common_custom.js

home_common_custom.js

143 ms

channels-json.cgi

channels-json.cgi

153 ms

pubads_impl.js

pubads_impl.js

109 ms

rd

rd

45 ms

s-code-contents-0b74c9d90041474fca9eb826f8638296988d3758.js

s-code-contents-0b74c9d90041474fca9eb826f8638296988d3758.js

33 ms

dest5.html

dest5.html

169 ms

id

id

176 ms

d

d

129 ms

d

d

149 ms

d

d

147 ms

js

js

70 ms

analytics.js

analytics.js

160 ms

1509.js

1509.js

160 ms

fbevents.js

fbevents.js

157 ms

ibs:dpid=411&dpuuid=Zjm4tgAAAJJN0QMv

ibs:dpid=411&dpuuid=Zjm4tgAAAJJN0QMv

27 ms

s16280209205579

s16280209205579

97 ms

collect

collect

52 ms

www.jbjs.org.json

www.jbjs.org.json

17 ms

p.gif

p.gif

35 ms

6735f9594d6bb8a4f1fe56c6b3e21cf5.js

6735f9594d6bb8a4f1fe56c6b3e21cf5.js

12 ms

collect

collect

6 ms

Accessibility Review

jbjs.org.uk accessibility score

73

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

Image elements do not have [alt] attributes

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

SEO Factors

jbjs.org.uk SEO score

77

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

High

robots.txt is not valid

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

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 Jbjs.org.uk 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 Jbjs.org.uk 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

jbjs.org.uk

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