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ncdp.columbia.edu screenshot

Report Summary

  • 29

    Performance

    Renders faster than
    49% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 71% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 92

    SEO

    Google-friendlier than
    74% of websites

ncdp.columbia.edu

National Center for Disaster Preparedness (NCDP) | Columbia University

Page Load Speed

2.3 sec in total

First Response

127 ms

Resources Loaded

1.2 sec

Page Rendered

998 ms

ncdp.columbia.edu screenshot

About Website

Visit ncdp.columbia.edu now to see the best up-to-date NCDP Columbia content for United States and also check out these interesting facts you probably never knew about ncdp.columbia.edu

The National Center for Disaster Preparedness (NCDP), Columbia Climate School, at Columbia University works to understand and improve the nation’s capacity to prepare for, respond to, and recover from...

Visit ncdp.columbia.edu

Key Findings

We analyzed Ncdp.columbia.edu page load time and found that the first response time was 127 ms and then it took 2.2 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

ncdp.columbia.edu performance score

29

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.7 s

12/100

10%

LCP (Largest Contentful Paint)

Value17.9 s

0/100

25%

SI (Speed Index)

Value5.3 s

59/100

10%

TBT (Total Blocking Time)

Value580 ms

51/100

30%

CLS (Cumulative Layout Shift)

Value0.362

30/100

15%

TTI (Time to Interactive)

Value10.4 s

24/100

10%

Network Requests Diagram

ncdp.columbia.edu

127 ms

ncdp.columbia.edu

227 ms

js

81 ms

prettyPhoto.css

27 ms

wp-video-lightbox.css

56 ms

Our browser made a total of 62 requests to load all elements on the main page. We found that 84% of them (52 requests) were addressed to the original Ncdp.columbia.edu, 5% (3 requests) were made to Static.addtoany.com and 5% (3 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (437 ms) belongs to the original domain Ncdp.columbia.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 93.5 kB (3%)

Content Size

3.0 MB

After Optimization

2.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Ncdp.columbia.edu main page is 3.0 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. 80% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 2.6 MB which makes up the majority of the site volume.

HTML Optimization

-85%

Potential reduce by 86.2 kB

  • Original 101.5 kB
  • After minification 81.7 kB
  • After compression 15.3 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 19.9 kB, which is 20% 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 86.2 kB or 85% of the original size.

Image Optimization

-0%

Potential reduce by 0 B

  • Original 2.6 MB
  • After minification 2.6 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. NCDP Columbia images are well optimized though.

JavaScript Optimization

-3%

Potential reduce by 6.0 kB

  • Original 214.5 kB
  • After minification 214.5 kB
  • After compression 208.5 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

-2%

Potential reduce by 1.3 kB

  • Original 79.4 kB
  • After minification 78.7 kB
  • After compression 78.0 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. Ncdp.columbia.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 34 (64%)

Requests Now

53

After Optimization

19

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 53 CSS, Javascripts, AJAX and image requests in order to completely render the main page of NCDP Columbia. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and from 14 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

ncdp.columbia.edu

ncdp.columbia.edu

127 ms

ncdp.columbia.edu

ncdp.columbia.edu

227 ms

js

js

81 ms

prettyPhoto.css

prettyPhoto.css

27 ms

wp-video-lightbox.css

wp-video-lightbox.css

56 ms

style.min.css

style.min.css

44 ms

style.css

style.css

42 ms

jquery.fancybox.min.css

jquery.fancybox.min.css

207 ms

css2

css2

46 ms

all.min.css

all.min.css

49 ms

ionicons.min.css

ionicons.min.css

74 ms

slick.css

slick.css

63 ms

addtoany.min.css

addtoany.min.css

64 ms

style.css

style.css

221 ms

jquery.min.js

jquery.min.js

97 ms

jquery-migrate.min.js

jquery-migrate.min.js

96 ms

jquery.prettyPhoto.js

jquery.prettyPhoto.js

97 ms

video-lightbox.js

video-lightbox.js

101 ms

page.js

page.js

59 ms

addtoany.min.js

addtoany.min.js

102 ms

jquery.stellar.min.js

jquery.stellar.min.js

110 ms

core.min.js

core.min.js

110 ms

jquery-ui.min.js

jquery-ui.min.js

34 ms

slick.min.js

slick.min.js

127 ms

swfobject.js

swfobject.js

129 ms

jquery.scrollTo.js

jquery.scrollTo.js

129 ms

jquery.cycle2.min.js

jquery.cycle2.min.js

298 ms

jquery.cycle2.carousel.min.js

jquery.cycle2.carousel.min.js

290 ms

imagesloaded.pkgd.min.js

imagesloaded.pkgd.min.js

288 ms

jquery.fancybox.min.js

jquery.fancybox.min.js

282 ms

media.js

media.js

431 ms

imagesloaded.min.js

imagesloaded.min.js

245 ms

masonry.min.js

masonry.min.js

264 ms

main.js

main.js

437 ms

animate.css

animate.css

84 ms

icon-font.min.css

icon-font.min.css

105 ms

style.css

style.css

86 ms

cropped-ncdp-20yrs-logo.webp

cropped-ncdp-20yrs-logo.webp

63 ms

Training_Education_Header.jpg

Training_Education_Header.jpg

64 ms

utilities_and_resilience_header.jpeg

utilities_and_resilience_header.jpeg

63 ms

covid-virus-3d-modeling.webp

covid-virus-3d-modeling.webp

145 ms

haitieq.jpg

haitieq.jpg

151 ms

23_NCDP_20thYears_white_L@2x.png

23_NCDP_20thYears_white_L@2x.png

148 ms

sm.25.html

sm.25.html

60 ms

eso.D0Uc7kY6.js

eso.D0Uc7kY6.js

143 ms

KFOmCnqEu92Fr1Me5Q.ttf

KFOmCnqEu92Fr1Me5Q.ttf

88 ms

KFOlCnqEu92Fr1MmEU9vAw.ttf

KFOlCnqEu92Fr1MmEU9vAw.ttf

88 ms

KFOlCnqEu92Fr1MmYUtvAw.ttf

KFOlCnqEu92Fr1MmYUtvAw.ttf

88 ms

fa-solid-900.ttf

fa-solid-900.ttf

373 ms

fa-regular-400.ttf

fa-regular-400.ttf

323 ms

DRR_and_Climate_Blog_InFocus.jpg

DRR_and_Climate_Blog_InFocus.jpg

90 ms

H5N1.jpg

H5N1.jpg

90 ms

SongWatershed-InFocus.jpg

SongWatershed-InFocus.jpg

154 ms

tandedu_whatwedo.jpeg

tandedu_whatwedo.jpeg

92 ms

NHIv2_web-scaled.jpg

NHIv2_web-scaled.jpg

153 ms

Policypractice_WhatWeDo.jpeg

Policypractice_WhatWeDo.jpeg

154 ms

Preparednesstools_WhatWeDo.jpeg

Preparednesstools_WhatWeDo.jpeg

155 ms

HurricaneKatrina-Perspectives-FEMA_JocelynAug.jpg

HurricaneKatrina-Perspectives-FEMA_JocelynAug.jpg

156 ms

FEMA_Tribal_Perspectives.png

FEMA_Tribal_Perspectives.png

164 ms

Depositphotos_7979142_m.webp

Depositphotos_7979142_m.webp

156 ms

fa-v4compatibility.ttf

fa-v4compatibility.ttf

167 ms

fa-brands-400.ttf

fa-brands-400.ttf

250 ms

Accessibility Review

ncdp.columbia.edu accessibility score

89

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

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

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 IDs are not unique

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

Links do not have a discernible name

Best Practices

ncdp.columbia.edu best practices score

83

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

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

ncdp.columbia.edu SEO score

92

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

Links do not have descriptive text

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

High

Tap targets are not sized appropriately

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 Ncdp.columbia.edu 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 Ncdp.columbia.edu 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

ncdp.columbia.edu

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