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roslyn.io screenshot

Report Summary

  • 32

    Performance

    Renders faster than
    52% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 74% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

roslyn.io

GitHub - dotnet/roslyn: The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs.

Page Load Speed

2.9 sec in total

First Response

501 ms

Resources Loaded

1.9 sec

Page Rendered

410 ms

roslyn.io screenshot

About Website

Welcome to roslyn.io homepage info - get ready to check Roslyn best content for Italy right away, or after learning these important things about roslyn.io

The Roslyn .NET compiler provides C# and Visual Basic languages with rich code analysis APIs. - GitHub - dotnet/roslyn: The Roslyn .NET compiler provides C# and Visual Basic languages with rich code a...

Visit roslyn.io

Key Findings

We analyzed Roslyn.io page load time and found that the first response time was 501 ms and then it took 2.4 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

roslyn.io performance score

32

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

36/100

10%

LCP (Largest Contentful Paint)

Value5.1 s

25/100

25%

SI (Speed Index)

Value6.1 s

45/100

10%

TBT (Total Blocking Time)

Value2,290 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value12.1 s

16/100

10%

Network Requests Diagram

roslyn

501 ms

light-efd2f2257c96.css

89 ms

dark-6b1e37da2254.css

105 ms

primer-primitives-8500c2c7ce5f.css

106 ms

primer-9f7b2e63c497.css

128 ms

Our browser made a total of 128 requests to load all elements on the main page. We found that 0% of them (0 request) were addressed to the original Roslyn.io, 16% (21 requests) were made to Camo.githubusercontent.com and 16% (20 requests) were made to Avatars.githubusercontent.com. The less responsive or slowest element that took the longest time to load (1.2 sec) relates to the external source Camo.githubusercontent.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 699.2 kB (40%)

Content Size

1.7 MB

After Optimization

1.1 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Roslyn.io 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Javascripts take 844.3 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 427.9 kB

  • Original 490.6 kB
  • After minification 480.8 kB
  • After compression 62.7 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. 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 427.9 kB or 87% of the original size.

Image Optimization

-81%

Potential reduce by 224.8 kB

  • Original 276.2 kB
  • After minification 51.4 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. Obviously, Roslyn needs image optimization as it can save up to 224.8 kB or 81% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-5%

Potential reduce by 40.7 kB

  • Original 844.3 kB
  • After minification 844.3 kB
  • After compression 803.6 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

-4%

Potential reduce by 5.7 kB

  • Original 138.6 kB
  • After minification 138.6 kB
  • After compression 132.9 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. Roslyn.io has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 82 (65%)

Requests Now

127

After Optimization

45

  • Images
  • JavaScript
  • CSS

The browser has sent 127 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Roslyn. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 74 to 1 for JavaScripts and from 10 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

roslyn

roslyn

501 ms

light-efd2f2257c96.css

light-efd2f2257c96.css

89 ms

dark-6b1e37da2254.css

dark-6b1e37da2254.css

105 ms

primer-primitives-8500c2c7ce5f.css

primer-primitives-8500c2c7ce5f.css

106 ms

primer-9f7b2e63c497.css

primer-9f7b2e63c497.css

128 ms

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146 ms

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github-cf4e90581e80.css

163 ms

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124 ms

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142 ms

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161 ms

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173 ms

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177 ms

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174 ms

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181 ms

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190 ms

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191 ms

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189 ms

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189 ms

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196 ms

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197 ms

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vendors-node_modules_lit-html_lit-html_js-ce7225a304c5.js

195 ms

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195 ms

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197 ms

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202 ms

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203 ms

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205 ms

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202 ms

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204 ms

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1241 ms

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372 ms

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366 ms

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374 ms

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390 ms

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396 ms

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Accessibility Review

roslyn.io accessibility score

90

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

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

Links do not have a discernible name

Best Practices

roslyn.io 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

roslyn.io SEO score

91

Search Engine Optimization Advices

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 Roslyn.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 Roslyn.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

roslyn.io

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