Report Summary

  • 67

    Performance

    Renders faster than
    80% of other websites

  • 78

    Accessibility

    Visual factors better than
    that of 46% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 84

    SEO

    Google-friendlier than
    53% of websites

python.org

Welcome to Python.org

Page Load Speed

28.7 sec in total

First Response

194 ms

Resources Loaded

16.5 sec

Page Rendered

12 sec

python.org screenshot

About Website

Welcome to python.org homepage info - get ready to check Python best content for China right away, or after learning these important things about python.org

The official home of the Python Programming Language

Visit python.org

Key Findings

We analyzed Python.org page load time and found that the first response time was 194 ms and then it took 28.5 sec to load all DOM resources and completely render a web page. This is a poor result, as 95% of websites can load faster.

Performance Metrics

python.org performance score

67

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.8 s

28/100

10%

LCP (Largest Contentful Paint)

Value5.3 s

21/100

25%

SI (Speed Index)

Value3.8 s

84/100

10%

TBT (Total Blocking Time)

Value120 ms

97/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value6.3 s

60/100

10%

Network Requests Diagram

www.python.org

194 ms

modernizr.js

332 ms

style.css

1144 ms

mq.css

845 ms

jquery.min.js

2167 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 74% of them (20 requests) were addressed to the original Python.org, 7% (2 requests) were made to Ajax.googleapis.com and 7% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (8.4 sec) relates to the external source Ssl.google-analytics.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 347.7 kB (61%)

Content Size

570.9 kB

After Optimization

223.3 kB

In fact, the total size of Python.org main page is 570.9 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. 45% of websites need less resources to load. CSS take 346.0 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 46.3 kB

  • Original 56.1 kB
  • After minification 44.1 kB
  • After compression 9.8 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 12.0 kB, which is 21% 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 46.3 kB or 83% of the original size.

Image Optimization

-9%

Potential reduce by 2.1 kB

  • Original 23.2 kB
  • After minification 21.1 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. Python images are well optimized though.

JavaScript Optimization

-50%

Potential reduce by 73.4 kB

  • Original 145.7 kB
  • After minification 145.3 kB
  • After compression 72.2 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 73.4 kB or 50% of the original size.

CSS Optimization

-65%

Potential reduce by 225.9 kB

  • Original 346.0 kB
  • After minification 346.0 kB
  • After compression 120.1 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. Python.org needs all CSS files to be minified and compressed as it can save up to 225.9 kB or 65% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (25%)

Requests Now

20

After Optimization

15

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Python. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

python.org accessibility score

78

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

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

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.

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

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Some elements have a [tabindex] value greater than 0

Best Practices

python.org best practices score

75

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

Browser errors were logged to the console

SEO Factors

python.org SEO score

84

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

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

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Python.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Python.org 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

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