Tools & Wizards About Us

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

assets.carolus.raywenderlich.com

Kodeco | Learn iOS, Android & Flutter

Page Load Speed

1.3 sec in total

First Response

8 ms

Resources Loaded

458 ms

Page Rendered

873 ms

About Website

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Key Findings

We analyzed Assets.carolus.raywenderlich.com page load time and found that the first response time was 8 ms and then it took 1.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

assets.carolus.raywenderlich.com performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

65/100

10%

LCP (Largest Contentful Paint)

Value13.2 s

0/100

25%

SI (Speed Index)

Value5.7 s

51/100

10%

TBT (Total Blocking Time)

Value2,030 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value17.2 s

4/100

10%

Network Requests Diagram

assets.carolus.raywenderlich.com

8 ms

assets.carolus.raywenderlich.com

132 ms

gtm.js

147 ms

application_kodeco-8fb8d11561355eedbbcc650ad0ec4459143177a8cdf657275e103d7fc2b8747e.css

56 ms

application-esbuild-1007f3b6a60c04a704557ec9ad35b53d020ec9ead498bc5ef2e822e278c75b2e.css

53 ms

Our browser made a total of 37 requests to load all elements on the main page. We found that 5% of them (2 requests) were addressed to the original Assets.carolus.raywenderlich.com, 65% (24 requests) were made to Assets.carolus.kodeco.com and 22% (8 requests) were made to Files.carolus.kodeco.com. The less responsive or slowest element that took the longest time to load (192 ms) relates to the external source Assets.carolus.kodeco.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 198.9 kB (12%)

Content Size

1.7 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Assets.carolus.raywenderlich.com main page is 1.7 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. 50% of websites need less resources to load. Javascripts take 912.3 kB which makes up the majority of the site volume.

HTML Optimization

-77%

Potential reduce by 153.0 kB

  • Original 198.0 kB
  • After minification 173.0 kB
  • After compression 45.0 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 25.0 kB, which is 13% 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 153.0 kB or 77% of the original size.

Image Optimization

-2%

Potential reduce by 9.2 kB

  • Original 398.3 kB
  • After minification 389.1 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. Assets Carolus Raywenderlich images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 0 B

  • Original 912.3 kB
  • After minification 912.3 kB
  • After compression 912.3 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

-20%

Potential reduce by 36.8 kB

  • Original 181.1 kB
  • After minification 181.1 kB
  • After compression 144.3 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. Assets.carolus.raywenderlich.com needs all CSS files to be minified and compressed as it can save up to 36.8 kB or 20% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (11%)

Requests Now

28

After Optimization

25

  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Assets Carolus Raywenderlich. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

assets.carolus.raywenderlich.com accessibility score

67

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

Buttons do not have an accessible name

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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

Best Practices

assets.carolus.raywenderlich.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

assets.carolus.raywenderlich.com SEO score

79

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

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Assets.carolus.raywenderlich.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 Assets.carolus.raywenderlich.com main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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