Tools & Wizards About Us
scipy-lectures.org screenshot

Report Summary

  • 84

    Performance

    Renders faster than
    88% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 55

    SEO

    Google-friendlier than
    20% of websites

scipy-lectures.org

Scientific Python Lectures — Scientific Python Lectures

Page Load Speed

600 ms in total

First Response

21 ms

Resources Loaded

433 ms

Page Rendered

146 ms

scipy-lectures.org screenshot

About Website

Visit scipy-lectures.org now to see the best up-to-date Scipy Lectures content for United States and also check out these interesting facts you probably never knew about scipy-lectures.org

Visit scipy-lectures.org

Key Findings

We analyzed Scipy-lectures.org page load time and found that the first response time was 21 ms and then it took 579 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

scipy-lectures.org performance score

84

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.3 s

73/100

10%

LCP (Largest Contentful Paint)

Value2.3 s

93/100

25%

SI (Speed Index)

Value2.3 s

98/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.423

23/100

15%

TTI (Time to Interactive)

Value2.6 s

98/100

10%

Network Requests Diagram

scipy-lectures.org

21 ms

www.scipy-lectures.org

87 ms

nature.css

54 ms

pygments.css

57 ms

jquery.js

97 ms

Our browser made a total of 21 requests to load all elements on the main page. We found that 62% of them (13 requests) were addressed to the original Scipy-lectures.org, 19% (4 requests) were made to Google.com and 10% (2 requests) were made to Cse.google.com. The less responsive or slowest element that took the longest time to load (97 ms) belongs to the original domain Scipy-lectures.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 131.0 kB (83%)

Content Size

157.4 kB

After Optimization

26.4 kB

  • HTML
  • Images
  • CSS

In fact, the total size of Scipy-lectures.org main page is 157.4 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 30% of websites need less resources to load. HTML takes 107.7 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 90.3 kB

  • Original 107.7 kB
  • After minification 107.0 kB
  • After compression 17.4 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 90.3 kB or 84% of the original size.

Image Optimization

-16%

Potential reduce by 70 B

  • Original 441 B
  • After minification 371 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. Obviously, Scipy Lectures needs image optimization as it can save up to 70 B or 16% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

CSS Optimization

-82%

Potential reduce by 40.6 kB

  • Original 49.2 kB
  • After minification 34.2 kB
  • After compression 8.6 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. Scipy-lectures.org needs all CSS files to be minified and compressed as it can save up to 40.6 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 12 (71%)

Requests Now

17

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Scipy Lectures. 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 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

scipy-lectures.org

scipy-lectures.org

21 ms

www.scipy-lectures.org

www.scipy-lectures.org

87 ms

nature.css

nature.css

54 ms

pygments.css

pygments.css

57 ms

jquery.js

jquery.js

97 ms

underscore.js

underscore.js

59 ms

doctools.js

doctools.js

48 ms

copybutton.js

copybutton.js

47 ms

base-min.css

base-min.css

13 ms

basic.css

basic.css

36 ms

default.css

default.css

36 ms

cse.js

cse.js

48 ms

minus.png

minus.png

50 ms

plusBox.png

plusBox.png

51 ms

logo.svg

logo.svg

65 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

5 ms

jsapi

jsapi

17 ms

default+en.css

default+en.css

3 ms

default.css

default.css

14 ms

default+en.I.js

default+en.I.js

81 ms

default.css

default.css

20 ms

Accessibility Review

scipy-lectures.org accessibility score

100

Accessibility Issues

Best Practices

scipy-lectures.org best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

scipy-lectures.org SEO score

55

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Scipy-lectures.org 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 Scipy-lectures.org 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.

Social Sharing Optimization

scipy-lectures.org

Open Graph description is not detected on the main page of Scipy Lectures. 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: