Access youlun.tuniu.com. 邮轮旅游_游轮旅游_邮轮攻略

name

value

score

weighting

FCP (First Contentful Paint)

Value5.5 s

6/100

10%

LCP (Largest Contentful Paint)

Value6.1 s

12/100

25%

SI (Speed Index)

Value10.2 s

8/100

10%

TBT (Total Blocking Time)

Value1,660 ms

11/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value12.7 s

14/100

10%

youlun.tuniu.com

557 ms

youlun.tuniu.com

1292 ms

reset.css

984 ms

style_v2.css

951 ms

base64.js

1043 ms

Our browser made a total of 88 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Youlun.tuniu.com, 19% (17 requests) were made to Ssl1.tuniucdn.com and 11% (10 requests) were made to Img1.tuniucdn.com. The less responsive or slowest element that took the longest time to load (2.2 sec) relates to the external source M.tuniucdn.com.

Content Size

1.7 MB

After Optimization

911.6 kB

In fact, the total size of Youlun.tuniu.com main page is 1.7 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. 50% of websites need less resources to load. Images take 1.0 MB which makes up the majority of the site volume.

HTML Optimization

-88%

Potential reduce by 261.8 kB

Original 298.5 kB
After minification 282.9 kB
After compression 36.7 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. 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 261.8 kB or 88% of the original size.

Image Optimization

-24%

Potential reduce by 241.8 kB

Original 1.0 MB
After minification 766.8 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, Youlun Tuniu needs image optimization as it can save up to 241.8 kB or 24% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-70%

Potential reduce by 250.4 kB

Original 358.5 kB
After minification 358.5 kB
After compression 108.1 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 250.4 kB or 70% of the original size.

Requests Now

After Optimization

The browser has sent 83 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Youlun Tuniu. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 26 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

High

[aria-*] attributes do not match their roles

High

[role]s do not have all required [aria-*] attributes

High

Elements with an ARIA [role] that require children to contain a specific [role] are missing some or all of those required children.

High

[role]s are not contained by their required parent element

High

[role] values are not valid

High

[aria-*] attributes do not have valid values

High

[aria-*] attributes are not valid or misspelled

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

[id] attributes on active, focusable elements are not unique

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

Links do not have a discernible name

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

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

Serves images with low resolution

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Issues were logged in the Issues panel in Chrome Devtools

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

Language and Encoding

Language Detected

ZH
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Youlun.tuniu.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 Youlun.tuniu.com 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

youlun.tuniu.com

Open Graph description is not detected on the main page of Youlun Tuniu. 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

邮轮旅游_游轮旅游_邮轮攻略_途牛

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

youlun.tuniu.com

youlun.tuniu.com

reset.css

style_v2.css

base64.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

youlun.tuniu.com

youlun.tuniu.com

reset.css

style_v2.css

base64.js

in-min.js

header_v2.js

getDegree.js

screen_size.js

top_map.css

TN_date.css

search_ajax.js

top_map.css

top_map.css

noindex_login.js

aria.js

search_input.js

index_nav_menu.css

index_base_v5.js

jquery.easing.1.3.js

jsUtil.js

channel_v2.css

fta.min.js

common_foot_v3.css

zeus.js

getdata_v4.js

jquery_autoSlide.js

TN-slider.js

lazyloadnew.min.js

monitor.js

script_v2.js

ffslide.js

TN231DHLW.js

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head_icon_qrcode.gif

stat.gif

logo_20170124.png

local_branch.png

white.gif

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huangjia.png

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