Tools & Wizards About Us
doerrfeld.io screenshot

Report Summary

  • 58

    Performance

    Renders faster than
    74% of other websites

  • 86

    Accessibility

    Visual factors better than
    that of 61% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

doerrfeld.io

Doerrfeld.io - Bill Doerrfeld, Tech Journalist / API Thought Leader

Page Load Speed

20.9 sec in total

First Response

51 ms

Resources Loaded

20.2 sec

Page Rendered

657 ms

doerrfeld.io screenshot

About Website

Visit doerrfeld.io now to see the best up-to-date Doerrfeld content and also check out these interesting facts you probably never knew about doerrfeld.io

Hi, I'm Bill Doerrfeld, a tech journalist. I write about new cloud technologies, APIs, DevOps, low-code/no-code, and related areas. I am the Editor in Chief for Nordic APIs and have also contributed t...

Visit doerrfeld.io

Key Findings

We analyzed Doerrfeld.io page load time and found that the first response time was 51 ms and then it took 20.9 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster. Unfortunately, there was 1 request timeout, which can generally increase the web page load time, as the browser stays idle while waiting for website response.

Performance Metrics

doerrfeld.io performance score

58

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value4.1 s

46/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value650 ms

46/100

30%

CLS (Cumulative Layout Shift)

Value0.172

70/100

15%

TTI (Time to Interactive)

Value8.5 s

38/100

10%

Network Requests Diagram

doerrfeld.io

51 ms

www.doerrfeld.io

85 ms

script.js

231 ms

emaww.js

20133 ms

analytics.js

102 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 4% of them (2 requests) were addressed to the original Doerrfeld.io, 58% (26 requests) were made to Lirp.cdn-website.com and 9% (4 requests) were made to Platform.twitter.com. The less responsive or slowest element that took the longest time to load (20.1 sec) relates to the external source Lib.emaww.ai.

Page Optimization Overview & Recommendations

Page size can be reduced by 352.8 kB (32%)

Content Size

1.1 MB

After Optimization

750.3 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Doerrfeld.io main page is 1.1 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Images take 785.3 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 128.6 kB

  • Original 167.0 kB
  • After minification 157.8 kB
  • After compression 38.4 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 128.6 kB or 77% of the original size.

Image Optimization

-29%

Potential reduce by 224.1 kB

  • Original 785.3 kB
  • After minification 561.2 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, Doerrfeld needs image optimization as it can save up to 224.1 kB or 29% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-0%

Potential reduce by 159 B

  • Original 150.8 kB
  • After minification 150.8 kB
  • After compression 150.7 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 7 (17%)

Requests Now

41

After Optimization

34

  • AJAX
  • Images
  • JavaScript

The browser has sent 41 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Doerrfeld. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

doerrfeld.io

doerrfeld.io

51 ms

www.doerrfeld.io

www.doerrfeld.io

85 ms

script.js

script.js

231 ms

emaww.js

emaww.js

20133 ms

analytics.js

analytics.js

102 ms

Doerrfeld_Logo_2020-1920w.png

Doerrfeld_Logo_2020-1920w.png

168 ms

smiling-aac14472-1440w.jpg

smiling-aac14472-1440w.jpg

209 ms

widgets.js

widgets.js

79 ms

Be+careful+with+open+source+ai+doerrfeld+leaddev.webp

Be+careful+with+open+source+ai+doerrfeld+leaddev.webp

159 ms

jquery-3.7.0.min.js

jquery-3.7.0.min.js

133 ms

d-js-one-runtime-unified-desktop.min.js

d-js-one-runtime-unified-desktop.min.js

153 ms

d-js-jquery-migrate.min.js

d-js-jquery-migrate.min.js

152 ms

will+AI-generated+code+become+normalized+in+2025+doerrfeld-1920w.jpg

will+AI-generated+code+become+normalized+in+2025+doerrfeld-1920w.jpg

163 ms

How+resilient+CIOs+are+future-proofing+to+avoid+risks-1920w.jpg

How+resilient+CIOs+are+future-proofing+to+avoid+risks-1920w.jpg

151 ms

Engineering+cooks+continuous+learning+Slack+Doerrfeld+LeadDev+DirectorPlus-1920w.jpg

Engineering+cooks+continuous+learning+Slack+Doerrfeld+LeadDev+DirectorPlus-1920w.jpg

250 ms

postgres+database+article-698w.jpeg

postgres+database+article-698w.jpeg

215 ms

Kubernetes+costs+out+of+control+LeadDev-698w.jpeg

Kubernetes+costs+out+of+control+LeadDev-698w.jpeg

215 ms

wasm+future+componentized+cloud+native+now-698w.jpeg

wasm+future+componentized+cloud+native+now-698w.jpeg

216 ms

Is-REST-Still-a-Good-API-Design-Style-to-Use--698w.jpg

Is-REST-Still-a-Good-API-Design-Style-to-Use--698w.jpg

250 ms

Istio+v1.3+What-s+New%2C+What-s+Coming-698w.jpg

Istio+v1.3+What-s+New%2C+What-s+Coming-698w.jpg

217 ms

Tips-on-Creating-Outstanding-Developer-Experiences-e1587080791817-698w.jpg

Tips-on-Creating-Outstanding-Developer-Experiences-e1587080791817-698w.jpg

294 ms

Ways+to+Extend+the+Core+Kubernetes+API-698w.jpg

Ways+to+Extend+the+Core+Kubernetes+API-698w.jpg

352 ms

github-actions-698w.jpg

github-actions-698w.jpg

510 ms

How-to-Make-GraphQL-Work-For-You-2-e1587080863219-698w.jpg

How-to-Make-GraphQL-Work-For-You-2-e1587080863219-698w.jpg

294 ms

the+future+of+cloud+infrastructure+kubernetes-698w.jpg

the+future+of+cloud+infrastructure+kubernetes-698w.jpg

323 ms

Open+source+is+at+a+cross+roads+the+new+stack-698w.jpeg

Open+source+is+at+a+cross+roads+the+new+stack-698w.jpeg

323 ms

how+CIOs+navigate+generative+AI+in+the+enterprise-698w.png

how+CIOs+navigate+generative+AI+in+the+enterprise-698w.png

410 ms

api+governance+cio+feature+doerrfeld-698w.png

api+governance+cio+feature+doerrfeld-698w.png

393 ms

operationalizing+LLMs+focus+for+2024-698w.jpeg

operationalizing+LLMs+focus+for+2024-698w.jpeg

389 ms

6+Traits+That+Define+DevSecOps+-698w.jpg

6+Traits+That+Define+DevSecOps+-698w.jpg

429 ms

kubernetes+state+report+2020-698w.jpg

kubernetes+state+report+2020-698w.jpg

642 ms

How+CIOs+Can+Use+DevOps+To+Move+Customer+Experience+Forward-698w.jpg

How+CIOs+Can+Use+DevOps+To+Move+Customer+Experience+Forward-698w.jpg

519 ms

10+docker+security+tools-698w.jpg

10+docker+security+tools-698w.jpg

473 ms

Best+of+2018-+Introduction+to+Using+the+Kubernetes+REST+API-698w.jpg

Best+of+2018-+Introduction+to+Using+the+Kubernetes+REST+API-698w.jpg

507 ms

corona+cios-698w.jpg

corona+cios-698w.jpg

515 ms

How+to+scale+microservices+CI%3ACD+pipelines-698w.jpg

How+to+scale+microservices+CI%3ACD+pipelines-698w.jpg

540 ms

Doerrfeld_Logo_2020-90w.png

Doerrfeld_Logo_2020-90w.png

589 ms

collect

collect

48 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

45 ms

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

widget_iframe.2f70fb173b9000da126c79afe2098f02.html

40 ms

js

js

97 ms

settings

settings

119 ms

button.856debeac157d9669cf51e73a08fbc93.js

button.856debeac157d9669cf51e73a08fbc93.js

4 ms

embeds

embeds

35 ms

follow_button.2f70fb173b9000da126c79afe2098f02.en.html

follow_button.2f70fb173b9000da126c79afe2098f02.en.html

14 ms

Accessibility Review

doerrfeld.io 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-hidden="true"] elements contain focusable descendents

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best Practices

doerrfeld.io 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

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

doerrfeld.io SEO score

77

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

High

Image elements do not have [alt] attributes

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

    EN

  • Encoding

    UTF-8

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

doerrfeld.io

Open Graph data is detected on the main page of Doerrfeld. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: