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Web Frameworks

29 bjtu.edu.cn Last Updated: 8 months

Success 62% of passed verification steps
Warning 15% of total warning
Errors 23% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 74%
Best Practices Desktop Score 69%
SEO Desktop Score 80%
Progressive Web App Desktop Score 54%
Performance Mobile Score 68%
Best Practices Mobile Score 62%
SEO Mobile Score 82%
Progressive Web App Mobile Score 56%
Page Authority Authority 48%
Domain Authority Domain Authority 45%
Moz Rank 4.8/10
Bounce Rate Rate 0%
Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 6 Characters
北京交通大学
Meta Description 0 Characters
NO DATA
Effective URL 19 Characters
https://bjtu.edu.cn
Excerpt Page content
北京交通大学 校友 访客及考生 教职工 学生 English ...
Keywords Cloud Density
人才招聘3 访客及考生2 知行信息交流平台2 土木建筑工程学院2 交通运输学院2 经济管理学院2 计算机与信息技术学院2 电子信息工程学院2 院系设置2 一卡通自助服务2
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
人才招聘 3
访客及考生 2
知行信息交流平台 2
土木建筑工程学院 2
交通运输学院 2
经济管理学院 2
计算机与信息技术学院 2
电子信息工程学院 2
院系设置 2
一卡通自助服务 2
Google Preview Your look like this in google search result
北京交通大学
https://bjtu.edu.cn
北京交通大学 校友 访客及考生 教职工 学生 English ...
Robots.txt File Detected
Sitemap.xml File Detected
Page Size Code & Text Ratio
Document Size: ~52.13 KB
Code Size: ~27.13 KB
Text Size: ~25 KB Ratio: 47.95%

Estimation Traffic and Earnings

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Technologies

PWA - Manifest

Manifest is not valid
Your site don't have valid manifest.json, read more in Web App Manifest

Desktop

Desktop Screenshot
Includes front-end JavaScript libraries with known security vulnerabilities 2 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Avoid chaining critical requests 8 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Avoids an excessive DOM size 769 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Minify JavaScript Potential savings of 4 KB
Minifying JavaScript files can reduce payload sizes and script parse time
First Meaningful Paint 0.6 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 42 requests • 4,985 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 35 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 30 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 0.6 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Estimated Input Latency 10 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Minify CSS Potential savings of 5 KB
Minifying CSS files can reduce network payload sizes
Remove unused CSS Potential savings of 11 KB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Serve images in next-gen formats Potential savings of 3,498 KB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Reduce server response times (TTFB) Root document took 1,710 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 60 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Efficiently encode images Potential savings of 2,666 KB
Optimized images load faster and consume less cellular data
Enable text compression Potential savings of 154 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Total Blocking Time 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 0.1 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Properly size images Potential savings of 3,178 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 5.5 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 0.6 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).
Avoid enormous network payloads Total size was 4,980 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimizes main-thread work 0.6 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 0.5 s
First Contentful Paint marks the time at which the first text or image is painted

Mobile

Mobile Screenshot
Time to Interactive 4.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
First Contentful Paint (3G) 3690 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Estimated Input Latency 10 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Minify CSS Potential savings of 5 KB
Minifying CSS files can reduce network payload sizes
Tap targets are not sized appropriately 92% appropriately sized tap targets
Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements
Document uses legible font sizes 100% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px
Remove unused CSS Potential savings of 10 KB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Serve images in next-gen formats Potential savings of 4,490 KB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Reduce server response times (TTFB) Root document took 1,350 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 60 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Efficiently encode images Potential savings of 2,701 KB
Optimized images load faster and consume less cellular data
Enable text compression Potential savings of 154 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Total Blocking Time 40 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 0.2 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Properly size images Potential savings of 2,727 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 10.6 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 3.0 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle).
Avoid enormous network payloads Total size was 6,124 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimizes main-thread work 1.4 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 1.9 s
First Contentful Paint marks the time at which the first text or image is painted
Includes front-end JavaScript libraries with known security vulnerabilities 2 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Avoid chaining critical requests 8 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Avoids an excessive DOM size 777 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Minify JavaScript Potential savings of 4 KB
Minifying JavaScript files can reduce payload sizes and script parse time
First Meaningful Paint 1.9 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 41 requests • 6,128 KB
To set budgets for the quantity and size of page resources, add a budget.json file
Serve static assets with an efficient cache policy 36 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 140 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task

Speed And Optimization Tips

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Alexa Rank

0

Local Rank: / Users: / PageViews:

Global Rank

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/1.1 200 OK
Date: Thu, 23 Jan 2020 08:00:12 GMT
Server: Apache
Last-Modified: Wed, 22 Jan 2020 17:11:00 GMT
ETag: "beff-59cbd9bd46fea"
Accept-Ranges: bytes
Content-Length: 48895
Content-Type: text/html
DNS Records DNS Resource Records associated with a hostname
View DNS Records

Comments

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