3.4 sec in total
441 ms
2.5 sec
484 ms
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Visit opendatascience.comWe analyzed Opendatascience.com page load time and found that the first response time was 441 ms and then it took 3 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
opendatascience.com performance score
name
value
score
weighting
Value6.0 s
4/100
10%
Value21.7 s
0/100
25%
Value12.5 s
3/100
10%
Value1,800 ms
9/100
30%
Value0.172
69/100
15%
Value24.7 s
0/100
10%
441 ms
79 ms
113 ms
117 ms
161 ms
Our browser made a total of 87 requests to load all elements on the main page. We found that 44% of them (38 requests) were addressed to the original Opendatascience.com, 13% (11 requests) were made to Pbs.twimg.com and 11% (10 requests) were made to O.twimg.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Opendatascience.com.
Page size can be reduced by 553.5 kB (12%)
4.7 MB
4.1 MB
In fact, the total size of Opendatascience.com main page is 4.7 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. 65% of websites need less resources to load. Images take 4.1 MB which makes up the majority of the site volume.
Potential reduce by 37.5 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 6.5 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 37.5 kB or 80% of the original size.
Potential reduce by 120.6 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. Open Data Science images are well optimized though.
Potential reduce by 199.1 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 199.1 kB or 65% of the original size.
Potential reduce by 196.3 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. Opendatascience.com needs all CSS files to be minified and compressed as it can save up to 196.3 kB or 82% of the original size.
Number of requests can be reduced by 31 (38%)
82
51
The browser has sent 82 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Open Data Science. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 15 to 1 for CSS and as a result speed up the page load time.
www.opendatascience.com
441 ms
style.min.css
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styles.css
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toptwenfive.css
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chosen.css
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jquery.js
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analytics.js
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logo1.png
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opendatascience.com accessibility score
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
[id] attributes on active, focusable elements are not unique
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
Image elements do not have [alt] attributes
Links do not have a discernible name
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
opendatascience.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
opendatascience.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
Document uses 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 Opendatascience.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 Opendatascience.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.
opendatascience.com
Open Graph description is not detected on the main page of Open Data Science. 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: