6.2 sec in total
1.9 sec
4 sec
348 ms
Visit chemistry.ucla.edu now to see the best up-to-date Chemistry UCLA content for United States and also check out these interesting facts you probably never knew about chemistry.ucla.edu
Visit chemistry.ucla.eduWe analyzed Chemistry.ucla.edu page load time and found that the first response time was 1.9 sec and then it took 4.3 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.
chemistry.ucla.edu performance score
name
value
score
weighting
Value3.6 s
31/100
10%
Value7.3 s
5/100
25%
Value6.6 s
37/100
10%
Value130 ms
96/100
30%
Value0
100/100
15%
Value5.1 s
76/100
10%
1893 ms
247 ms
268 ms
248 ms
314 ms
Our browser made a total of 64 requests to load all elements on the main page. We found that all of those requests were addressed to Chemistry.ucla.edu and no external sources were called. The less responsive or slowest element that took the longest time to load (1.9 sec) belongs to the original domain Chemistry.ucla.edu.
Page size can be reduced by 383.4 kB (24%)
1.6 MB
1.2 MB
In fact, the total size of Chemistry.ucla.edu main page is 1.6 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. 45% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.
Potential reduce by 48.0 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 48.0 kB or 82% of the original size.
Potential reduce by 189.2 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. Obviously, Chemistry UCLA needs image optimization as it can save up to 189.2 kB or 14% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 94.9 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 94.9 kB or 74% of the original size.
Potential reduce by 51.2 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. Chemistry.ucla.edu needs all CSS files to be minified and compressed as it can save up to 51.2 kB or 79% of the original size.
Number of requests can be reduced by 18 (29%)
63
45
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Chemistry UCLA. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 7 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
chemistry.ucla.edu
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chemistry.ucla.edu accessibility score
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
[id] attributes on active, focusable elements are not unique
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
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
<input type="image"> elements do not have [alt] text
Links do not have a discernible name
chemistry.ucla.edu 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
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
chemistry.ucla.edu SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Chemistry.ucla.edu 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 Chemistry.ucla.edu 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.
chemistry.ucla.edu
Open Graph description is not detected on the main page of Chemistry UCLA. 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: