Tools & Wizards About Us
sdjames.me screenshot

Report Summary

  • 30

    Performance

    Renders faster than
    50% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

sdjames.me

Steven James | Reinforcement Learning | Wits University

Page Load Speed

617 ms in total

First Response

72 ms

Resources Loaded

464 ms

Page Rendered

81 ms

sdjames.me screenshot

About Website

Visit sdjames.me now to see the best up-to-date Sd James content and also check out these interesting facts you probably never knew about sdjames.me

Steve James - Faculty at the University of the Wiwtatersrand. Research focuses on reinforcement and transfer learning.

Visit sdjames.me

Key Findings

We analyzed Sdjames.me page load time and found that the first response time was 72 ms and then it took 545 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

sdjames.me performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

16/100

10%

LCP (Largest Contentful Paint)

Value7.0 s

6/100

25%

SI (Speed Index)

Value5.1 s

61/100

10%

TBT (Total Blocking Time)

Value830 ms

35/100

30%

CLS (Cumulative Layout Shift)

Value0.293

41/100

15%

TTI (Time to Interactive)

Value7.9 s

43/100

10%

Network Requests Diagram

sdjames.me

72 ms

js

88 ms

jquery.min.js

39 ms

katex.min.css

35 ms

katex.min.js

51 ms

Our browser made a total of 36 requests to load all elements on the main page. We found that 44% of them (16 requests) were addressed to the original Sdjames.me, 28% (10 requests) were made to Fonts.gstatic.com and 6% (2 requests) were made to Googletagmanager.com. The less responsive or slowest element that took the longest time to load (178 ms) relates to the external source Googletagmanager.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 41.6 kB (22%)

Content Size

191.0 kB

After Optimization

149.4 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Sdjames.me main page is 191.0 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. 60% of websites need less resources to load. Images take 90.9 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 39.0 kB

  • Original 47.7 kB
  • After minification 36.8 kB
  • After compression 8.7 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 10.9 kB, which is 23% 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 39.0 kB or 82% of the original size.

Image Optimization

-3%

Potential reduce by 2.5 kB

  • Original 90.9 kB
  • After minification 88.4 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. Sd James images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 67 B

  • Original 52.4 kB
  • After minification 52.4 kB
  • After compression 52.4 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.

Requests Breakdown

Number of requests can be reduced by 20 (83%)

Requests Now

24

After Optimization

4

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sd James. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

sdjames.me

sdjames.me

72 ms

js

js

88 ms

jquery.min.js

jquery.min.js

39 ms

katex.min.css

katex.min.css

35 ms

katex.min.js

katex.min.js

51 ms

MathJax.js

MathJax.js

77 ms

css

css

76 ms

academicons.min.css

academicons.min.css

84 ms

fontawesome-all.min.js

fontawesome-all.min.js

171 ms

flickity.min.css

flickity.min.css

85 ms

theme-10.css

theme-10.css

87 ms

email-decode.min.js

email-decode.min.js

50 ms

jquery-3.3.1.min.js

jquery-3.3.1.min.js

100 ms

popper.min.js

popper.min.js

84 ms

bootstrap.min.js

bootstrap.min.js

142 ms

back-to-top.js

back-to-top.js

144 ms

flickity.pkgd.min.js

flickity.pkgd.min.js

143 ms

main.js

main.js

144 ms

flickity-custom.js

flickity-custom.js

168 ms

quotes.js

quotes.js

146 ms

TeX-MML-AM_CHTML.js

TeX-MML-AM_CHTML.js

17 ms

js

js

178 ms

analytics.js

analytics.js

41 ms

collect

collect

120 ms

profile.jpg

profile.jpg

61 ms

academicons.ttf

academicons.ttf

67 ms

KFOmCnqEu92Fr1Mu4mxP.ttf

KFOmCnqEu92Fr1Mu4mxP.ttf

54 ms

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

KFOlCnqEu92Fr1MmEU9fBBc9.ttf

55 ms

KFOlCnqEu92Fr1MmSU5fBBc9.ttf

KFOlCnqEu92Fr1MmSU5fBBc9.ttf

68 ms

KFOlCnqEu92Fr1MmWUlfBBc9.ttf

KFOlCnqEu92Fr1MmWUlfBBc9.ttf

78 ms

KFOlCnqEu92Fr1MmYUtfBBc9.ttf

KFOlCnqEu92Fr1MmYUtfBBc9.ttf

81 ms

KFOkCnqEu92Fr1Mu51xIIzc.ttf

KFOkCnqEu92Fr1Mu51xIIzc.ttf

80 ms

KFOjCnqEu92Fr1Mu51S7ACc6CsE.ttf

KFOjCnqEu92Fr1Mu51S7ACc6CsE.ttf

79 ms

KFOjCnqEu92Fr1Mu51TjASc6CsE.ttf

KFOjCnqEu92Fr1Mu51TjASc6CsE.ttf

80 ms

KFOjCnqEu92Fr1Mu51TzBic6CsE.ttf

KFOjCnqEu92Fr1Mu51TzBic6CsE.ttf

71 ms

KFOjCnqEu92Fr1Mu51TLBCc6CsE.ttf

KFOjCnqEu92Fr1Mu51TLBCc6CsE.ttf

81 ms

Accessibility Review

sdjames.me accessibility score

86

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

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

sdjames.me best practices score

83

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

High

Missing source maps for large first-party JavaScript

SEO Factors

sdjames.me SEO score

100

Search Engine Optimization Advices

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sdjames.me 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 Sdjames.me 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

sdjames.me

Open Graph description is not detected on the main page of Sd James. 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: