Tools & Wizards About Us

Report Summary

  • 37

    Performance

    Renders faster than
    56% 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

  • 90

    SEO

    Google-friendlier than
    68% of websites

exhibitions.library.columbia.edu

Digital Collections & Online Exhibitions | Columbia University Libraries

Page Load Speed

4.3 sec in total

First Response

123 ms

Resources Loaded

1.6 sec

Page Rendered

2.6 sec

About Website

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

Columbia University Libraries are the heart of the intellectual life at Columbia, and inspire inquiry, advance knowledge, catalyze discovery, and shape an inclusive and vibrant discourse all enabled b...

Visit exhibitions.library.columbia.edu

Key Findings

We analyzed Exhibitions.library.columbia.edu page load time and found that the first response time was 123 ms and then it took 4.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

exhibitions.library.columbia.edu performance score

37

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value3.9 s

53/100

25%

SI (Speed Index)

Value9.6 s

11/100

10%

TBT (Total Blocking Time)

Value1,260 ms

19/100

30%

CLS (Cumulative Layout Shift)

Value0.132

81/100

15%

TTI (Time to Interactive)

Value18.1 s

3/100

10%

Network Requests Diagram

exhibitions.library.columbia.edu

123 ms

exhibitions.library.columbia.edu

45 ms

digital-collections.html

280 ms

cul-toolkit.css

83 ms

shared.css

19 ms

Our browser made a total of 132 requests to load all elements on the main page. We found that 2% of them (2 requests) were addressed to the original Exhibitions.library.columbia.edu, 27% (35 requests) were made to Derivativo-1.library.columbia.edu and 23% (30 requests) were made to Derivativo-3.library.columbia.edu. The less responsive or slowest element that took the longest time to load (962 ms) relates to the external source Derivativo-3.library.columbia.edu.

Page Optimization Overview & Recommendations

Page size can be reduced by 262.5 kB (8%)

Content Size

3.2 MB

After Optimization

2.9 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Exhibitions.library.columbia.edu main page is 3.2 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. 70% of websites need less resources to load. Images take 2.2 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 191.5 kB

  • Original 238.8 kB
  • After minification 211.1 kB
  • After compression 47.3 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 27.6 kB, which is 12% 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 191.5 kB or 80% of the original size.

Image Optimization

-3%

Potential reduce by 67.4 kB

  • Original 2.2 MB
  • After minification 2.2 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. Exhibitions Library Columbia images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 683 B

  • Original 621.8 kB
  • After minification 621.8 kB
  • After compression 621.1 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

-7%

Potential reduce by 3.0 kB

  • Original 44.6 kB
  • After minification 44.6 kB
  • After compression 41.6 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. Exhibitions.library.columbia.edu has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 7 (5%)

Requests Now

129

After Optimization

122

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 129 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Exhibitions Library 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 8 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

exhibitions.library.columbia.edu accessibility score

89

Accessibility Issues

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.

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

exhibitions.library.columbia.edu best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

exhibitions.library.columbia.edu SEO score

90

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 Exhibitions.library.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 Exhibitions.library.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

Open Graph description is not detected on the main page of Exhibitions Library Columbia. 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: