Access itavcn.com. 投影机|电子白板|数字标牌|大屏|矩阵|会议|音响-数字视听网-专业数字视听行业门户

name

value

score

weighting

FCP (First Contentful Paint)

Value2.6 s

62/100

10%

LCP (Largest Contentful Paint)

Value10.4 s

0/100

25%

SI (Speed Index)

Value8.0 s

22/100

10%

TBT (Total Blocking Time)

Value490 ms

59/100

30%

CLS (Cumulative Layout Shift)

Value0.008

100/100

15%

TTI (Time to Interactive)

Value15.2 s

7/100

10%

itavcn.com

3800 ms

style_v2b.css

1817 ms

bottom_pop.css

1824 ms

jquery-1.3.1.min.js

1207 ms

xxk.js

778 ms

Our browser made a total of 146 requests to load all elements on the main page. We found that 88% of them (129 requests) were addressed to the original Itavcn.com, 4% (6 requests) were made to Hm.baidu.com and 1% (2 requests) were made to Pos.baidu.com. The less responsive or slowest element that took the longest time to load (4.7 sec) relates to the external source Zs4.cnzz.com.

Content Size

1.4 MB

After Optimization

995.7 kB

In fact, the total size of Itavcn.com main page is 1.4 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. 55% of websites need less resources to load. Images take 867.8 kB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 139.7 kB

Original 173.2 kB
After minification 164.5 kB
After compression 33.5 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 139.7 kB or 81% of the original size.

Image Optimization

-4%

Potential reduce by 34.7 kB

Original 867.8 kB
After minification 833.1 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. Itavcn images are well optimized though.

JavaScript Optimization

-58%

Potential reduce by 165.6 kB

Original 286.4 kB
After minification 285.7 kB
After compression 120.8 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 165.6 kB or 58% of the original size.

CSS Optimization

-83%

Potential reduce by 40.1 kB

Original 48.4 kB
After minification 42.1 kB
After compression 8.3 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. Itavcn.com needs all CSS files to be minified and compressed as it can save up to 40.1 kB or 83% of the original size.

Requests Now

143

After Optimization

105

The browser has sent 143 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Itavcn. 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.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

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

High

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

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.

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

High

Links do not have a discernible name

High

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Links are not crawlable

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Image elements do not have [alt] attributes

High

Document uses plugins

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

GBK

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Itavcn.com can be misinterpreted by Google and other search engines. Our service has detected that Chinese 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 Itavcn.com main page’s claimed encoding is gbk. 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

itavcn.com

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

Report Summary

Performance

Accessibility

Best Practices

SEO

投影机|电子白板|数字标牌|大屏|矩阵|会议|音响-数字视听网-专业数字视听行业门户

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

itavcn.com

style_v2b.css

bottom_pop.css

jquery-1.3.1.min.js

xxk.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

itavcn.com

style_v2b.css

bottom_pop.css

jquery-1.3.1.min.js

xxk.js

o.js

cont.js

jquery.min.js

bj.jpg

2015sdpxindexbg.jpg

z_navlogo_03.jpg

z_xinnavshouye_03.jpg

notice_new.gif

jiefei47758.gif

shidaiaoshi248_58.gif

glq2015060321.gif

xiwo720x68px.gif

kx300x30.gif

2016010408014.jpg

bjz298-208.jpg

2016010331047.jpg

glq20160318028.jpg

feilixin14360.gif

ad_byh2014030714360.gif

ad_atsj2014031214360.gif

kuanbo20150529143-60.gif

vhdlog_dyn.gif

143-x-60.jpg

ad_rili20130104.jpg

ad_0130xunbao153-60.gif

qj153-60.gif

a_plmx0802.gif

ad_lanpu20120104.jpg

ad_fxd2013091315360.gif

ad_shae20130104.jpg

ad_hongz20120104.jpg

ad_sony20130104.jpg

reac20120713.gif

ad_sphy2014022115360.gif

414X90unilumin.gif

liyade-02.jpg

benq-190115.jpg

qingtoushouye.jpg