Tools & Wizards About Us

Report Summary

  • 73

    Performance

    Renders faster than
    82% of other websites

  • 52

    Accessibility

    Visual factors better than
    that of 21% of websites

  • 54

    Best Practices

    More advanced features
    available than in
    20% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

isailor.us

Wärtsilä iSailor - Marine Navigation, Chart Plotter and AIS Viewer for iPhone and iPad

Page Load Speed

1.4 sec in total

First Response

272 ms

Resources Loaded

959 ms

Page Rendered

161 ms

About Website

Click here to check amazing ISailor content for United Kingdom. Otherwise, check out these important facts you probably never knew about isailor.us

Wärtsilä iSailor is a marine GPS navigation system intended for use on iPads, iPhones, Android smartphones and tablets. An excellent solution for boats and yachts owners!

Visit isailor.us

Key Findings

We analyzed Isailor.us page load time and found that the first response time was 272 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.

Performance Metrics

isailor.us performance score

73

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value1.6 s

94/100

10%

LCP (Largest Contentful Paint)

Value7.2 s

5/100

25%

SI (Speed Index)

Value3.2 s

92/100

10%

TBT (Total Blocking Time)

Value100 ms

98/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.1 s

87/100

10%

Network Requests Diagram

isailor.us

272 ms

jquery.js

169 ms

thickbox.js

167 ms

thickbox.css

167 ms

s.css

172 ms

Our browser made a total of 30 requests to load all elements on the main page. We found that 63% of them (19 requests) were addressed to the original Isailor.us, 13% (4 requests) were made to Google-analytics.com and 7% (2 requests) were made to Staticxx.facebook.com. The less responsive or slowest element that took the longest time to load (494 ms) belongs to the original domain Isailor.us.

Page Optimization Overview & Recommendations

Page size can be reduced by 109.4 kB (16%)

Content Size

703.7 kB

After Optimization

594.3 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Isailor.us main page is 703.7 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. 40% of websites need less resources to load. Images take 535.9 kB which makes up the majority of the site volume.

HTML Optimization

-71%

Potential reduce by 15.0 kB

  • Original 21.0 kB
  • After minification 19.2 kB
  • After compression 6.0 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. 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 15.0 kB or 71% of the original size.

Image Optimization

-1%

Potential reduce by 6.8 kB

  • Original 535.9 kB
  • After minification 529.1 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. ISailor images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 80.5 kB

  • Original 137.8 kB
  • After minification 134.3 kB
  • After compression 57.3 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 80.5 kB or 58% of the original size.

CSS Optimization

-79%

Potential reduce by 7.1 kB

  • Original 9.0 kB
  • After minification 6.1 kB
  • After compression 1.9 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. Isailor.us needs all CSS files to be minified and compressed as it can save up to 7.1 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 10 (36%)

Requests Now

28

After Optimization

18

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 28 CSS, Javascripts, AJAX and image requests in order to completely render the main page of ISailor. 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.

Network Requests Diagram

Accessibility Review

isailor.us accessibility score

52

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

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

isailor.us best practices score

54

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

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Registers an unload listener

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

SEO Factors

isailor.us SEO score

69

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

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Isailor.us 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 Isailor.us 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 description is not detected on the main page of ISailor. 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: