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osti.gov screenshot

Report Summary

  • 63

    Performance

    Renders faster than
    77% of other websites

  • 100

    Accessibility

    Visual factors better than
    that of 97% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 100

    SEO

    Google-friendlier than
    94% of websites

osti.gov

OSTI.GOV | U.S. Department of Energy Office of Scientific and Technical Information

Page Load Speed

1.6 sec in total

First Response

182 ms

Resources Loaded

1.3 sec

Page Rendered

72 ms

osti.gov screenshot

About Website

Welcome to osti.gov homepage info - get ready to check OSTI best content for China right away, or after learning these important things about osti.gov

U.S. Department of Energy Office of Scientific and Technical Information - OSTI.GOV is the primary search tool for Department of Energy science, technology, and engineering research informationfunded ...

Visit osti.gov

Key Findings

We analyzed Osti.gov page load time and found that the first response time was 182 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

osti.gov performance score

63

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

89/100

25%

SI (Speed Index)

Value2.9 s

95/100

10%

TBT (Total Blocking Time)

Value740 ms

40/100

30%

CLS (Cumulative Layout Shift)

Value0.226

55/100

15%

TTI (Time to Interactive)

Value8.2 s

40/100

10%

Network Requests Diagram

osti.gov

182 ms

www.osti.gov

324 ms

js

65 ms

jquery-3.5.1.min.js

142 ms

jquery-migrate.min.js

227 ms

Our browser made a total of 27 requests to load all elements on the main page. We found that 48% of them (13 requests) were addressed to the original Osti.gov, 15% (4 requests) were made to Googletagmanager.com and 15% (4 requests) were made to . The less responsive or slowest element that took the longest time to load (324 ms) belongs to the original domain Osti.gov.

Page Optimization Overview & Recommendations

Page size can be reduced by 208.1 kB (41%)

Content Size

502.5 kB

After Optimization

294.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Osti.gov main page is 502.5 kB. 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. HTML takes 260.5 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 206.8 kB

  • Original 260.5 kB
  • After minification 259.8 kB
  • After compression 53.7 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 206.8 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 7 B

  • Original 17.7 kB
  • After minification 17.7 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. OSTI images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 927 B

  • Original 79.3 kB
  • After minification 78.7 kB
  • After compression 78.4 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. This website has mostly compressed JavaScripts.

CSS Optimization

-0%

Potential reduce by 353 B

  • Original 145.0 kB
  • After minification 145.0 kB
  • After compression 144.7 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. Osti.gov has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 9 (45%)

Requests Now

20

After Optimization

11

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 20 CSS, Javascripts, AJAX and image requests in order to completely render the main page of OSTI. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

osti.gov

osti.gov

182 ms

www.osti.gov

www.osti.gov

324 ms

js

js

65 ms

jquery-3.5.1.min.js

jquery-3.5.1.min.js

142 ms

jquery-migrate.min.js

jquery-migrate.min.js

227 ms

jquery.once.js

jquery.once.js

227 ms

doe-seal-white-600-33-min.png

doe-seal-white-600-33-min.png

270 ms

OSTItitle_325-min.png

OSTItitle_325-min.png

268 ms

footer-us-doe-frontpage-min_0.png

footer-us-doe-frontpage-min_0.png

266 ms

footer-office-of-science-frontpage-min_0.png

footer-office-of-science-frontpage-min_0.png

267 ms

footer-osti-frontpage-min_0.png

footer-osti-frontpage-min_0.png

271 ms

fontawesome.font_.css

fontawesome.font_.css

163 ms

roboto.font_.css

roboto.font_.css

154 ms

login

login

26 ms

ga.js

ga.js

54 ms

analytics.js

analytics.js

26 ms

Universal-Federated-Analytics-Min.js

Universal-Federated-Analytics-Min.js

54 ms

GSF1GEMTidzDRlAXrFQhwhLiKYZMQNzvQAwqutZkSLoCK5ZgKQBgGgOirAvYOKQ4qIRKQEAkZgLkSKoX3YgQpSCi55U93obWcYTCg13LFAQ4THljQarlDwWDAJrzwQZPsDCa8sEAlY4e+Z+fJD1McVZIA

GSF1GEMTidzDRlAXrFQhwhLiKYZMQNzvQAwqutZkSLoCK5ZgKQBgGgOirAvYOKQ4qIRKQEAkZgLkSKoX3YgQpSCi55U93obWcYTCg13LFAQ4THljQarlDwWDAJrzwQZPsDCa8sEAlY4e+Z+fJD1McVZIA

17 ms

3cY481lTZrDnkgt2aU5LTW4YG0eljhQIdbhgQHA3I0GDyWiuelemD4DWcocMLAxK5ONOAtJj6Ax42V9E=

3cY481lTZrDnkgt2aU5LTW4YG0eljhQIdbhgQHA3I0GDyWiuelemD4DWcocMLAxK5ONOAtJj6Ax42V9E=

17 ms

AboJB4wAAAA=

AboJB4wAAAA=

17 ms

collect

collect

36 ms

__utm.gif

__utm.gif

20 ms

js

js

29 ms

collect

collect

66 ms

js

js

135 ms

js

js

130 ms

collect

collect

129 ms

Accessibility Review

osti.gov accessibility score

100

Accessibility Issues

Best Practices

osti.gov best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

osti.gov SEO score

100

Search Engine Optimization Advices

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Osti.gov can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Osti.gov 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

osti.gov

Open Graph data is detected on the main page of OSTI. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: