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87 bu.edu Last Updated: 9 months

Success 70% of passed verification steps
Warning 15% of total warning
Errors 15% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 50%
Best Practices Desktop Score 69%
SEO Desktop Score 91%
Progressive Web App Desktop Score 15%
Performance Mobile Score 2%
Best Practices Mobile Score 77%
SEO Mobile Score 92%
Progressive Web App Mobile Score 19%
Page Authority Authority 61%
Domain Authority Domain Authority 89%
Moz Rank 6.1/10
Bounce Rate Rate 0%
Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 28 Characters
HOMEPAGE | BOSTON UNIVERSITY
Meta Description 139 Characters
Boston University is a leading private research institution with two primary campuses in the heart of Boston and programs around the world.
Effective URL 17 Characters
http://www.bu.edu
Excerpt Page content
Homepage | Boston University Skip to Main Content Boston University Full Menu Close Menu Admissions Academics Research ...
Keywords Cloud Density
university7 boston6 research5 search5 students4 alumni4 magazine3 faculty3 giving3 resources3
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
university 7
boston 6
research 5
search 5
students 4
alumni 4
magazine 3
faculty 3
giving 3
resources 3
Google Preview Your look like this in google search result
HOMEPAGE | BOSTON UNIVERSITY
http://www.bu.edu
Boston University is a leading private research institution with two primary campuses in the heart of Boston and programs around the world.
Robots.txt File Detected
Sitemap.xml File Detected
Whois Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system
Updated: 1970-01-01 / 51 years
Create on: 1970-01-01 / 51 years
Expires on: 1970-01-01 / 617 months 15 days
Page Size Code & Text Ratio
Document Size: ~55.52 KB
Code Size: ~47.74 KB
Text Size: ~7.79 KB Ratio: 14.03%

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
Avoid chaining critical requests 36 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 400 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 61 KB
Minifying JavaScript files can reduce payload sizes and script parse time
First Meaningful Paint 2.8 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 81 requests • 6,384 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 47 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 80 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 3.3 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
Page load is not fast enough on mobile networks Interactive on simulated mobile network at 19.0 s
A fast page load over a cellular network ensures a good mobile user experience
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 2 KB
Minifying CSS files can reduce network payload sizes
Remove unused CSS Potential savings of 1,516 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 642 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
Does not use HTTPS 51 insecure requests found
All sites should be protected with HTTPS, even ones that don't handle sensitive data. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs
Server response times are low (TTFB) Root document took 150 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 1,920 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Enable text compression Potential savings of 1,654 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Efficiently encode images Potential savings of 10 KB
Optimized images load faster and consume less cellular data
Minimize third-party usage Third-party code blocked the main thread for 20 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Total Blocking Time 10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
JavaScript execution time 0.4 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 274 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 2.5 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 3.3 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 6,321 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimizes main-thread work 1.2 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 2.5 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

Mobile

Mobile Screenshot
Total Blocking Time 230 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds.
Reduce JavaScript execution time 1.9 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
Defer offscreen images Potential savings of 135 KB
Consider lazy-loading offscreen and hidden images after all critical resources have finished loading to lower time to interactive
Properly size images Potential savings of 5 KB
Serve images that are appropriately-sized to save cellular data and improve load time
Speed Index 13.0 s
Speed Index shows how quickly the contents of a page are visibly populated
First CPU Idle 14.6 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 6,214 KB
Large network payloads cost users real money and are highly correlated with long load times
Minimize main-thread work 5.0 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
First Contentful Paint 13.0 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 34 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 400 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 61 KB
Minifying JavaScript files can reduce payload sizes and script parse time
First Meaningful Paint 14.6 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 70 requests • 6,308 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 47 resources found
A long cache lifetime can speed up repeat visits to your page
Max Potential First Input Delay 310 ms
The maximum potential First Input Delay that your users could experience is the duration, in milliseconds, of the longest task
Time to Interactive 18.7 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
Page load is not fast enough on mobile networks Interactive at 18.7 s
A fast page load over a cellular network ensures a good mobile user experience
First Contentful Paint (3G) 29670 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 30 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 2 KB
Minifying CSS files can reduce network payload sizes
Tap targets are sized appropriately 100% 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 93.44% 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 1,593 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 611 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
Does not use HTTPS 51 insecure requests found
All sites should be protected with HTTPS, even ones that don't handle sensitive data. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs
Server response times are low (TTFB) Root document took 210 ms
Time To First Byte identifies the time at which your server sends a response
Eliminate render-blocking resources Potential savings of 10,410 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 10 KB
Optimized images load faster and consume less cellular data
Enable text compression Potential savings of 1,697 KB
Text-based resources should be served with compression (gzip, deflate or brotli) to minimize total network bytes
Reduce the impact of third-party code Third-party code blocked the main thread for 480 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading

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
Content-Type: text/html
Content-Length: 56852
Connection: keep-alive
Date: Sun, 08 Dec 2019 14:51:03 GMT
Server: nginx/1.12.1
Last-Modified: Sun, 08 Dec 2019 14:08:42 GMT
x-amz-version-id: bV9cJugP05EuXlh2gzEXfGG3DFSEjlMd
ETag: "0ab974ca5e6c1809beddd338a452ad19"
Cache-Control: max-age=1800
X-Backend: aws_home
X-Upstream: aws_home
X-Cache: Miss from cloudfront
Via: 1.1 ba93d64cb248ed4a264c9ee401175457.cloudfront.net (CloudFront)
X-Amz-Cf-Pop: EWR52-C4
X-Amz-Cf-Id: qSx4JmgQ0x--zx9lwl3j_ZVFP8ynX0sTaA5-q2mA6b88bB0MtoYJDA==
DNS Records DNS Resource Records associated with a hostname
View DNS Records

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