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Books written by Jacek Laskowski (@jaceklaskowski). Independent Consultant passionate about #ApacheSpark, #ApacheKafka, #Scala, #sbt (and #Mesos #DCOS) ~ @theASF member ~ @WarszawScaLa leader ~ Java C...

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Our browser made a total of 5 requests to load all elements on the main page. We found that 20% of them (1 request) were addressed to the original Jaceklaskowski.gitbooks.io, 60% (3 requests) were made to Fonts.gstatic.com and 20% (1 request) were made to Fonts.googleapis.com. The less responsive or slowest element that took the longest time to load (36 ms) belongs to the original domain Jaceklaskowski.gitbooks.io.

Content Size

554.7 kB

After Optimization

203.1 kB

In fact, the total size of Jaceklaskowski.gitbooks.io main page is 554.7 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. 25% of websites need less resources to load. Javascripts take 231.5 kB which makes up the majority of the site volume.

HTML Optimization

-68%

Potential reduce by 5.3 kB

Original 7.8 kB
After minification 7.0 kB
After compression 2.5 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 5.3 kB or 68% of the original size.

Image Optimization

-33%

Potential reduce by 44.7 kB

Original 134.0 kB
After minification 89.3 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, Jacek Laskowski Git Book S needs image optimization as it can save up to 44.7 kB or 33% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-64%

Potential reduce by 148.3 kB

Original 231.5 kB
After minification 231.5 kB
After compression 83.2 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 148.3 kB or 64% of the original size.

CSS Optimization

-85%

Potential reduce by 153.3 kB

Original 181.4 kB
After minification 180.5 kB
After compression 28.1 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. Jaceklaskowski.gitbooks.io needs all CSS files to be minified and compressed as it can save up to 153.3 kB or 85% of the original size.

Requests Now

After Optimization

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jacek Laskowski Git Book S. According to our analytics all requests are already optimized.

Language and Encoding

Language Detected

Language Claimed

N/A

Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Jaceklaskowski.gitbooks.io 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 Jaceklaskowski.gitbooks.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

jaceklaskowski.gitbooks.io

Open Graph description is not detected on the main page of Jacek Laskowski Git Book S. 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: