Tools & Wizards About Us
skymaps.com screenshot

Report Summary

  • 98

    Performance

    Renders faster than
    95% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 58

    SEO

    Google-friendlier than
    21% of websites

skymaps.com

Skymaps.com - Publication Quality Sky Maps & Star Charts

Page Load Speed

536 ms in total

First Response

83 ms

Resources Loaded

318 ms

Page Rendered

135 ms

skymaps.com screenshot

About Website

Welcome to skymaps.com homepage info - get ready to check Sky Maps best content for United States right away, or after learning these important things about skymaps.com

Quality sky maps (star charts) for skywatchers, educators and publishers. The Evening Sky Map (PDF) free each month. Find constellations, planets, comets.

Visit skymaps.com

Key Findings

We analyzed Skymaps.com page load time and found that the first response time was 83 ms and then it took 453 ms to load all DOM resources and completely render a web page. This is an excellent result, as only 5% of websites can load faster.

Performance Metrics

skymaps.com performance score

98

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.3 s

98/100

10%

LCP (Largest Contentful Paint)

Value2.2 s

95/100

25%

SI (Speed Index)

Value1.3 s

100/100

10%

TBT (Total Blocking Time)

Value20 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.002

100/100

15%

TTI (Time to Interactive)

Value2.2 s

99/100

10%

Network Requests Diagram

skymaps.com

83 ms

skymaps.com

109 ms

btn_donateCC_LG.gif

21 ms

logo.gif

24 ms

dot_clear.gif

64 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that 78% of them (14 requests) were addressed to the original Skymaps.com, 11% (2 requests) were made to Paypalobjects.com and 11% (2 requests) were made to Ssl.google-analytics.com. The less responsive or slowest element that took the longest time to load (124 ms) belongs to the original domain Skymaps.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 54.4 kB (32%)

Content Size

168.0 kB

After Optimization

113.5 kB

  • HTML
  • Images
  • JavaScript

In fact, the total size of Skymaps.com main page is 168.0 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 10% of websites need less resources to load. Images take 101.2 kB which makes up the majority of the site volume.

HTML Optimization

-72%

Potential reduce by 14.7 kB

  • Original 20.5 kB
  • After minification 19.8 kB
  • After compression 5.8 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. 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 14.7 kB or 72% of the original size.

Image Optimization

-10%

Potential reduce by 10.6 kB

  • Original 101.2 kB
  • After minification 90.6 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. Sky Maps images are well optimized though.

JavaScript Optimization

-63%

Potential reduce by 29.1 kB

  • Original 46.3 kB
  • After minification 46.3 kB
  • After compression 17.1 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 29.1 kB or 63% of the original size.

Requests Breakdown

Number of requests can be reduced by 5 (31%)

Requests Now

16

After Optimization

11

  • Images
  • JavaScript

The browser has sent 16 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Sky Maps. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Network Requests Diagram

skymaps.com

skymaps.com

83 ms

skymaps.com

skymaps.com

109 ms

btn_donateCC_LG.gif

btn_donateCC_LG.gif

21 ms

logo.gif

logo.gif

24 ms

dot_clear.gif

dot_clear.gif

64 ms

The-Night-Sky-Planisphere-Package.png

The-Night-Sky-Planisphere-Package.png

88 ms

stars-5-0.gif

stars-5-0.gif

87 ms

deepmap600.png

deepmap600.png

106 ms

ga.js

ga.js

26 ms

skymap_small.jpg

skymap_small.jpg

85 ms

store2.gif

store2.gif

85 ms

twitter-bird.png

twitter-bird.png

85 ms

Seestar_S50.png

Seestar_S50.png

124 ms

0399579532.png

0399579532.png

106 ms

1797201182.png

1797201182.png

105 ms

stars-4-5.gif

stars-4-5.gif

105 ms

__utm.gif

__utm.gif

13 ms

pixel.gif

pixel.gif

2 ms

Accessibility Review

skymaps.com accessibility score

65

Accessibility Issues

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.

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

High

Links do not have a discernible name

Best Practices

skymaps.com best practices score

67

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

Serves images with low resolution

SEO Factors

skymaps.com SEO score

58

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

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 Skymaps.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 Skymaps.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

skymaps.com

Open Graph description is not detected on the main page of Sky Maps. 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: