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eric-jacob.com screenshot

Report Summary

  • 37

    Performance

    Renders faster than
    56% of other websites

  • 82

    Accessibility

    Visual factors better than
    that of 52% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 70

    SEO

    Google-friendlier than
    30% of websites

eric-jacob.com

Eric Jacob - Polynomial sequences of integers, reals or physical objects which then lead to the laws of physics - EJ Sciences

Page Load Speed

2.6 sec in total

First Response

409 ms

Resources Loaded

1.9 sec

Page Rendered

360 ms

eric-jacob.com screenshot

About Website

Welcome to eric-jacob.com homepage info - get ready to check Eric Jacob best content right away, or after learning these important things about eric-jacob.com

Visit eric-jacob.com

Key Findings

We analyzed Eric-jacob.com page load time and found that the first response time was 409 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

eric-jacob.com performance score

37

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.2 s

43/100

10%

LCP (Largest Contentful Paint)

Value3.2 s

72/100

25%

SI (Speed Index)

Value4.9 s

66/100

10%

TBT (Total Blocking Time)

Value1,420 ms

15/100

30%

CLS (Cumulative Layout Shift)

Value0.835

4/100

15%

TTI (Time to Interactive)

Value8.9 s

34/100

10%

Network Requests Diagram

eric-jacob.com

409 ms

eric-jacob.com

645 ms

adsbygoogle.js

378 ms

purify.min.js

56 ms

katex.min.css

105 ms

Our browser made a total of 19 requests to load all elements on the main page. We found that 21% of them (4 requests) were addressed to the original Eric-jacob.com, 21% (4 requests) were made to Cdn.jsdelivr.net and 16% (3 requests) were made to Googleads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (645 ms) belongs to the original domain Eric-jacob.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 98.2 kB (57%)

Content Size

171.2 kB

After Optimization

73.0 kB

  • HTML
  • Images

In fact, the total size of Eric-jacob.com main page is 171.2 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. 35% of websites need less resources to load. HTML takes 89.5 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 72.0 kB

  • Original 89.5 kB
  • After minification 87.3 kB
  • After compression 17.5 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 72.0 kB or 80% of the original size.

Image Optimization

-32%

Potential reduce by 26.2 kB

  • Original 81.7 kB
  • After minification 55.5 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. Obviously, Eric Jacob needs image optimization as it can save up to 26.2 kB or 32% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

Requests Breakdown

Number of requests can be reduced by 6 (38%)

Requests Now

16

After Optimization

10

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Eric Jacob. 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 as a result speed up the page load time.

Network Requests Diagram

eric-jacob.com

eric-jacob.com

409 ms

eric-jacob.com

eric-jacob.com

645 ms

adsbygoogle.js

adsbygoogle.js

378 ms

purify.min.js

purify.min.js

56 ms

katex.min.css

katex.min.css

105 ms

katex.min.js

katex.min.js

149 ms

auto-render.min.js

auto-render.min.js

148 ms

js

js

72 ms

jquery-3.6.0.min.js

jquery-3.6.0.min.js

24 ms

background_EJS_theories_mobile.png

background_EJS_theories_mobile.png

148 ms

background_EJS_theories_small.png

background_EJS_theories_small.png

285 ms

zenodo.8128364.svg

zenodo.8128364.svg

428 ms

88x31.png

88x31.png

71 ms

zenodo.8131906.svg

zenodo.8131906.svg

569 ms

88x31.png

88x31.png

73 ms

show_ads_impl.js

show_ads_impl.js

263 ms

zrt_lookup.html

zrt_lookup.html

53 ms

ads

ads

201 ms

ads

ads

177 ms

Accessibility Review

eric-jacob.com accessibility score

82

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

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

Best Practices

eric-jacob.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

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

eric-jacob.com SEO score

70

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Page is blocked from indexing

Content Best Practices

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

Impact

Issue

High

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

High

Document doesn't use legible font sizes

High

Tap targets are not sized appropriately

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 Eric-jacob.com 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 Eric-jacob.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

eric-jacob.com

Open Graph description is not detected on the main page of Eric Jacob. 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: