Tools & Wizards About Us

Report Summary

  • 97

    Performance

    Renders faster than
    94% of other websites

  • 70

    Accessibility

    Visual factors better than
    that of 35% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

buildingpythonprograms.com

Building Python Programs, by Stuart Reges, Marty Stepp, and Allison Obourn

Page Load Speed

1.1 sec in total

First Response

162 ms

Resources Loaded

810 ms

Page Rendered

156 ms

About Website

Click here to check amazing Building Python Programs content for United States. Otherwise, check out these important facts you probably never knew about buildingpythonprograms.com

Authors' web site for Building Python Programs, a textbook designed for use in a first course in computer science.

Visit buildingpythonprograms.com

Key Findings

We analyzed Buildingpythonprograms.com page load time and found that the first response time was 162 ms and then it took 966 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.

Performance Metrics

buildingpythonprograms.com performance score

97

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.1 s

81/100

10%

LCP (Largest Contentful Paint)

Value2.1 s

96/100

25%

SI (Speed Index)

Value2.1 s

99/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.009

100/100

15%

TTI (Time to Interactive)

Value2.1 s

99/100

10%

Network Requests Diagram

buildingpythonprograms.com

162 ms

www.buildingpythonprograms.com

189 ms

style.css

79 ms

urchin.js

6 ms

__utm.gif

3 ms

Our browser made a total of 7 requests to load all elements on the main page. We found that 71% of them (5 requests) were addressed to the original Buildingpythonprograms.com, 29% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (376 ms) belongs to the original domain Buildingpythonprograms.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 6.0 kB (1%)

Content Size

436.0 kB

After Optimization

430.1 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Buildingpythonprograms.com main page is 436.0 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. Only 5% of websites need less resources to load. Images take 420.4 kB which makes up the majority of the site volume.

HTML Optimization

-64%

Potential reduce by 4.7 kB

  • Original 7.4 kB
  • After minification 6.1 kB
  • After compression 2.6 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 1.2 kB, which is 17% 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 4.7 kB or 64% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 420.4 kB
  • After minification 420.4 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. Building Python Programs images are well optimized though.

JavaScript Optimization

-14%

Potential reduce by 971 B

  • Original 6.8 kB
  • After minification 6.8 kB
  • After compression 5.9 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 971 B or 14% of the original size.

CSS Optimization

-19%

Potential reduce by 267 B

  • Original 1.4 kB
  • After minification 1.4 kB
  • After compression 1.1 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. Buildingpythonprograms.com needs all CSS files to be minified and compressed as it can save up to 267 B or 19% of the original size.

Requests Breakdown

We found no issues to fix!

Requests Now

5

After Optimization

5

  • Images
  • JavaScript
  • CSS

The browser has sent 5 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Building Python Programs. According to our analytics all requests are already optimized.

Network Requests Diagram

Accessibility Review

buildingpythonprograms.com accessibility score

70

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

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

Best Practices

buildingpythonprograms.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

SEO Factors

buildingpythonprograms.com SEO score

67

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

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Buildingpythonprograms.com 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 Buildingpythonprograms.com main page’s claimed encoding is iso-8859-1. 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 description is not detected on the main page of Building Python Programs. 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: