1.5 sec in total
222 ms
1 sec
279 ms
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Visit community.oreilly.comWe analyzed Community.oreilly.com page load time and found that the first response time was 222 ms and then it took 1.3 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.
community.oreilly.com performance score
name
value
score
weighting
Value4.9 s
10/100
10%
Value6.5 s
9/100
25%
Value8.7 s
17/100
10%
Value2,900 ms
3/100
30%
Value0
100/100
15%
Value18.8 s
3/100
10%
222 ms
151 ms
180 ms
204 ms
21 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 Community.oreilly.com, 29% (14 requests) were made to Forums.oreilly.com and 29% (14 requests) were made to Cdn.oreillystatic.com. The less responsive or slowest element that took the longest time to load (230 ms) relates to the external source Cdn.oreillystatic.com.
Page size can be reduced by 378.2 kB (74%)
510.8 kB
132.6 kB
In fact, the total size of Community.oreilly.com main page is 510.8 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. 60% of websites need less resources to load. Javascripts take 195.9 kB which makes up the majority of the site volume.
Potential reduce by 115.8 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 18.9 kB, which is 14% 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 115.8 kB or 84% of the original size.
Potential reduce by 797 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. Community O Reilly images are well optimized though.
Potential reduce by 123.4 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 123.4 kB or 63% of the original size.
Potential reduce by 138.2 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. Community.oreilly.com needs all CSS files to be minified and compressed as it can save up to 138.2 kB or 87% of the original size.
Number of requests can be reduced by 36 (78%)
46
10
The browser has sent 46 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Community O Reilly. 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 7 to 1 for CSS and as a result speed up the page load time.
community.oreilly.com
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autocomplete_styles.css
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stylesheet.css
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mbstyles.css
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all-post-ml-forums.css
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calendar_date_select.js
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footerScripts.js
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community.oreilly.com accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[role]s are not contained by their required parent element
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
Best practices
These items highlight common accessibility best practices.
Impact
Issue
The document uses <meta http-equiv="refresh">
community.oreilly.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
community.oreilly.com SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Page is blocked from indexing
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
Document doesn't use legible font sizes
Tap targets are not sized appropriately
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Community.oreilly.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 Community.oreilly.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.
community.oreilly.com
Open Graph description is not detected on the main page of Community O Reilly. 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: