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zalo.vn

614 ms

zalo.vn

1133 ms

pc

280 ms

layout.css

1853 ms

custom.css

1340 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 7% of them (2 requests) were addressed to the original Zalo.vn, 70% (19 requests) were made to Stc-zaloprofile.zdn.vn and 7% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.9 sec) relates to the external source Stc-zaloprofile.zdn.vn.

Content Size

1.0 MB

After Optimization

892.6 kB

In fact, the total size of Zalo.vn main page is 1.0 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Images take 808.1 kB which makes up the majority of the site volume.

HTML Optimization

-75%

Potential reduce by 11.2 kB

Original 14.9 kB
After minification 12.8 kB
After compression 3.7 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 2.1 kB, which is 14% 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 11.2 kB or 75% of the original size.

Image Optimization

-9%

Potential reduce by 68.9 kB

Original 808.1 kB
After minification 739.2 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. Zalo images are well optimized though.

JavaScript Optimization

-18%

Potential reduce by 25.0 kB

Original 136.7 kB
After minification 134.9 kB
After compression 111.7 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 25.0 kB or 18% of the original size.

CSS Optimization

-37%

Potential reduce by 22.5 kB

Original 60.6 kB
After minification 60.1 kB
After compression 38.1 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. Zalo.vn needs all CSS files to be minified and compressed as it can save up to 22.5 kB or 37% of the original size.

Requests Now

After Optimization

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Zalo. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 11 to 1 for JavaScripts and as a result speed up the page load time.