3.7 sec in total
145 ms
3.2 sec
384 ms
Click here to check amazing Chem Science content for Canada. Otherwise, check out these important facts you probably never knew about chemscience.com
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Visit chemscience.comWe analyzed Chemscience.com page load time and found that the first response time was 145 ms and then it took 3.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.
chemscience.com performance score
name
value
score
weighting
Value9.6 s
0/100
10%
Value37.9 s
0/100
25%
Value15.3 s
1/100
10%
Value770 ms
38/100
30%
Value0.702
7/100
15%
Value41.9 s
0/100
10%
145 ms
1283 ms
44 ms
286 ms
349 ms
Our browser made a total of 110 requests to load all elements on the main page. We found that 86% of them (95 requests) were addressed to the original Chemscience.com, 7% (8 requests) were made to Embed.tawk.to and 2% (2 requests) were made to Cdnjs.cloudflare.com. The less responsive or slowest element that took the longest time to load (1.3 sec) belongs to the original domain Chemscience.com.
Page size can be reduced by 1.5 MB (17%)
8.9 MB
7.4 MB
In fact, the total size of Chemscience.com main page is 8.9 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. 85% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 7.6 MB which makes up the majority of the site volume.
Potential reduce by 116.6 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 116.6 kB or 86% of the original size.
Potential reduce by 665.5 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. Chem Science images are well optimized though.
Potential reduce by 252.1 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 252.1 kB or 36% of the original size.
Potential reduce by 464.8 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. Chemscience.com needs all CSS files to be minified and compressed as it can save up to 464.8 kB or 84% of the original size.
Number of requests can be reduced by 37 (36%)
102
65
The browser has sent 102 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chem 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 21 to 1 for JavaScripts and from 18 to 1 for CSS and as a result speed up the page load time.
chemscience.com
145 ms
www.chemscience.com
1283 ms
css2
44 ms
bootstrap.min.css
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cs-020.css
349 ms
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41 ms
owl.carousel.min.css
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chemscience.com accessibility score
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
Buttons do not have an accessible name
Image elements do not have [alt] attributes
Links do not have a discernible name
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
chemscience.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Requests the geolocation permission on page load
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Page has valid source maps
chemscience.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 Chemscience.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 Chemscience.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.
chemscience.com
Open Graph data is detected on the main page of Chem Science. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: