Access clhs.lisp.se. Common Lisp HyperSpec (TM)

Report Summary

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value0.8 s

100/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value0.8 s

100/100

10%

clhs.lisp.se

2128 ms

clhs.css

84 ms

LWLarge.gif

166 ms

CLHS_Lg.gif

169 ms

StartPts.gif

168 ms

Our browser made a total of 12 requests to load all elements on the main page. We found that all of those requests were addressed to Clhs.lisp.se and no external sources were called. The less responsive or slowest element that took the longest time to load (2.1 sec) belongs to the original domain Clhs.lisp.se.

Content Size

3.1 kB

After Optimization

1.0 kB

In fact, the total size of Clhs.lisp.se main page is 3.1 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 2.9 kB which makes up the majority of the site volume.

HTML Optimization

-67%

Potential reduce by 1.9 kB

Original 2.9 kB
After minification 2.8 kB
After compression 949 B

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 1.9 kB or 67% of the original size.

CSS Optimization

-70%

Potential reduce by 169 B

Original 241 B
After minification 95 B
After compression 72 B

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. Clhs.lisp.se needs all CSS files to be minified and compressed as it can save up to 169 B or 70% of the original size.

Requests Now

After Optimization

The browser has sent 11 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Clhs Lisp. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

Search Engine Optimization Advices

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Clhs.lisp.se can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Clhs.lisp.se main page’s claimed encoding is . 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.

Social Sharing Optimization

Open Graph description is not detected on the main page of Clhs Lisp. 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: