1.4 sec in total
582 ms
675 ms
178 ms
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Netlab, Caltech
Visit netlab.caltech.eduWe analyzed Netlab.caltech.edu page load time and found that the first response time was 582 ms and then it took 853 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.
netlab.caltech.edu performance score
name
value
score
weighting
Value6.8 s
1/100
10%
Value20.6 s
0/100
25%
Value6.8 s
34/100
10%
Value290 ms
79/100
30%
Value0.051
99/100
15%
Value8.0 s
43/100
10%
582 ms
122 ms
138 ms
Our browser made a total of 3 requests to load all elements on the main page. We found that all of those requests were addressed to Netlab.caltech.edu and no external sources were called. The less responsive or slowest element that took the longest time to load (582 ms) belongs to the original domain Netlab.caltech.edu.
Page size can be reduced by 9.9 kB (58%)
17.0 kB
7.1 kB
In fact, the total size of Netlab.caltech.edu main page is 17.0 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only a small number of websites need less resources to load. HTML takes 13.9 kB which makes up the majority of the site volume.
Potential reduce by 9.7 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 2.5 kB, which is 18% 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 9.7 kB or 70% of the original size.
Potential reduce by 193 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. Netlab Caltech images are well optimized though.
We found no issues to fix!
2
2
The browser has sent 2 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Netlab Caltech. According to our analytics all requests are already optimized.
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netlab.caltech.edu 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
Heading elements are not in a sequentially-descending order
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
Image elements do not have [alt] attributes
Links do not have a discernible name
Tables and lists
These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.
Impact
Issue
Lists do not contain only <li> elements and script supporting elements (<script> and <template>).
netlab.caltech.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
General
Impact
Issue
Detected JavaScript libraries
Missing source maps for large first-party JavaScript
netlab.caltech.edu SEO score
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
N/A
N/A
ISO-8859-1
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Netlab.caltech.edu can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Netlab.caltech.edu main page’s claimed encoding is iso-8859-1. Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
{{og_description}}
netlab.caltech.edu
Open Graph description is not detected on the main page of Netlab Caltech. 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: