Tools & Wizards About Us
sebastianraschka.com screenshot

Report Summary

  • 70

    Performance

    Renders faster than
    81% of other websites

  • 95

    Accessibility

    Visual factors better than
    that of 87% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

sebastianraschka.com

Sebastian Raschka, PhD

Page Load Speed

1.3 sec in total

First Response

215 ms

Resources Loaded

886 ms

Page Rendered

164 ms

sebastianraschka.com screenshot

About Website

Click here to check amazing Sebastian Raschka content for United States. Otherwise, check out these important facts you probably never knew about sebastianraschka.com

I'm Sebastian: a machine learning & AI researcher, programmer, and author. As Staff Research Engineer Lightning AI, I focus on the intersection of AI research, software development, and large language...

Visit sebastianraschka.com

Key Findings

We analyzed Sebastianraschka.com page load time and found that the first response time was 215 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

sebastianraschka.com performance score

70

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

93/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

89/100

25%

SI (Speed Index)

Value2.0 s

99/100

10%

TBT (Total Blocking Time)

Value820 ms

35/100

30%

CLS (Cumulative Layout Shift)

Value0.121

84/100

15%

TTI (Time to Interactive)

Value7.0 s

53/100

10%

Network Requests Diagram

sebastianraschka.com

215 ms

main.css

69 ms

font-awesome.min.css

134 ms

anchor.min.js

145 ms

ga.js

27 ms

Our browser made a total of 8 requests to load all elements on the main page. We found that 75% of them (6 requests) were addressed to the original Sebastianraschka.com, 25% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (525 ms) belongs to the original domain Sebastianraschka.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 71.1 kB (17%)

Content Size

411.8 kB

After Optimization

340.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Sebastianraschka.com main page is 411.8 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. 15% of websites need less resources to load. Images take 348.5 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 5.0 kB

  • Original 6.9 kB
  • After minification 4.7 kB
  • After compression 1.9 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 2.1 kB, which is 31% 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 5.0 kB or 72% of the original size.

Image Optimization

-10%

Potential reduce by 35.2 kB

  • Original 348.5 kB
  • After minification 313.3 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. Sebastian Raschka images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 34 B

  • Original 17.2 kB
  • After minification 17.2 kB
  • After compression 17.1 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. This website has mostly compressed JavaScripts.

CSS Optimization

-79%

Potential reduce by 30.9 kB

  • Original 39.3 kB
  • After minification 35.8 kB
  • After compression 8.3 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. Sebastianraschka.com needs all CSS files to be minified and compressed as it can save up to 30.9 kB or 79% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

7

After Optimization

7

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 7 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sebastian Raschka. According to our analytics all requests are already optimized.

Network Requests Diagram

sebastianraschka.com

sebastianraschka.com

215 ms

main.css

main.css

69 ms

font-awesome.min.css

font-awesome.min.css

134 ms

anchor.min.js

anchor.min.js

145 ms

ga.js

ga.js

27 ms

banner-bw-fuzzy.jpg

banner-bw-fuzzy.jpg

525 ms

__utm.gif

__utm.gif

27 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

257 ms

Accessibility Review

sebastianraschka.com accessibility score

95

Accessibility Issues

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

High

Links do not have a discernible name

Best Practices

sebastianraschka.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

sebastianraschka.com SEO score

82

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Links do not have descriptive text

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

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 Sebastianraschka.com 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 Sebastianraschka.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.

Social Sharing Optimization

sebastianraschka.com

Open Graph description is not detected on the main page of Sebastian Raschka. 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: