Tools & Wizards About Us

Report Summary

  • 81

    Performance

    Renders faster than
    86% of other websites

  • 65

    Accessibility

    Visual factors better than
    that of 30% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 67

    SEO

    Google-friendlier than
    26% of websites

nano.pppl.gov

Laboratory for Plasma Nanosynthesis & Nanofabrication | Princeton Plasma Physics Lab

Page Load Speed

614 ms in total

First Response

42 ms

Resources Loaded

413 ms

Page Rendered

159 ms

About Website

Welcome to nano.pppl.gov homepage info - get ready to check Nano Pppl best content for United States right away, or after learning these important things about nano.pppl.gov

Laboratory for Plasma Nanosynthesis & Nanofabrication (LPN) at Princeton Plasma Physics Laboratory (PPPL) is headed by Doctor Yevgeny Raitses and performs research of nanomaterial synthesis and functi...

Visit nano.pppl.gov

Key Findings

We analyzed Nano.pppl.gov page load time and found that the first response time was 42 ms and then it took 572 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 10% of websites can load faster.

Performance Metrics

nano.pppl.gov performance score

81

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

69/100

10%

LCP (Largest Contentful Paint)

Value3.6 s

61/100

25%

SI (Speed Index)

Value2.4 s

98/100

10%

TBT (Total Blocking Time)

Value180 ms

91/100

30%

CLS (Cumulative Layout Shift)

Value0.007

100/100

15%

TTI (Time to Interactive)

Value5.6 s

69/100

10%

Network Requests Diagram

nano.pppl.gov

42 ms

nano.pppl.gov

68 ms

main.css

42 ms

supplemental.css

62 ms

bootstrap.min.css

50 ms

Our browser made a total of 20 requests to load all elements on the main page. We found that 65% of them (13 requests) were addressed to the original Nano.pppl.gov, 15% (3 requests) were made to Maxcdn.bootstrapcdn.com and 10% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (206 ms) belongs to the original domain Nano.pppl.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 252.8 kB (14%)

Content Size

1.8 MB

After Optimization

1.5 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Nano.pppl.gov main page is 1.8 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 1.6 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 13.3 kB

  • Original 16.6 kB
  • After minification 10.7 kB
  • After compression 3.4 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 6.0 kB, which is 36% 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 13.3 kB or 80% of the original size.

Image Optimization

-11%

Potential reduce by 180.3 kB

  • Original 1.6 MB
  • After minification 1.5 MB

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, Nano Pppl needs image optimization as it can save up to 180.3 kB or 11% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-38%

Potential reduce by 32.0 kB

  • Original 83.3 kB
  • After minification 83.3 kB
  • After compression 51.3 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 32.0 kB or 38% of the original size.

CSS Optimization

-94%

Potential reduce by 27.3 kB

  • Original 28.9 kB
  • After minification 16.2 kB
  • After compression 1.6 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. Nano.pppl.gov needs all CSS files to be minified and compressed as it can save up to 27.3 kB or 94% of the original size.

Requests Breakdown

Number of requests can be reduced by 3 (18%)

Requests Now

17

After Optimization

14

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Nano Pppl. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 4 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

nano.pppl.gov accessibility score

65

Accessibility Issues

ARIA

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.

Impact

Issue

High

ARIA input fields do not have accessible names

High

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

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Internationalization and localization

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

Impact

Issue

High

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

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best Practices

nano.pppl.gov best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

nano.pppl.gov SEO score

67

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    N/A

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

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