Tools & Wizards About Us
leventhalmap.org screenshot

Report Summary

  • 14

    Performance

    Renders faster than
    26% of other websites

  • 89

    Accessibility

    Visual factors better than
    that of 72% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    56% of websites

  • 95

    SEO

    Google-friendlier than
    91% of websites

leventhalmap.org

Leventhal Map & Education Center at the Boston Public Library

Page Load Speed

8 sec in total

First Response

51 ms

Resources Loaded

2 sec

Page Rendered

6 sec

leventhalmap.org screenshot

About Website

Welcome to leventhalmap.org homepage info - get ready to check Leventhal Map best content for United States right away, or after learning these important things about leventhalmap.org

We use maps, geography, and history to explore the connections between places and people in Boston, New England, and beyond. Our collection of a quarter million goegraphic objects, our educational pro...

Visit leventhalmap.org

Key Findings

We analyzed Leventhalmap.org page load time and found that the first response time was 51 ms and then it took 8 sec to load all DOM resources and completely render a web page. This is a poor result, as 85% of websites can load faster.

Performance Metrics

leventhalmap.org performance score

14

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.5 s

36/100

10%

LCP (Largest Contentful Paint)

Value23.6 s

0/100

25%

SI (Speed Index)

Value11.9 s

4/100

10%

TBT (Total Blocking Time)

Value1,560 ms

13/100

30%

CLS (Cumulative Layout Shift)

Value0.306

38/100

15%

TTI (Time to Interactive)

Value22.1 s

1/100

10%

Network Requests Diagram

leventhalmap.org

51 ms

www.leventhalmap.org

131 ms

bootstrap.min.css

26 ms

slick.css

76 ms

animate.min.css

140 ms

Our browser made a total of 41 requests to load all elements on the main page. We found that 34% of them (14 requests) were addressed to the original Leventhalmap.org, 22% (9 requests) were made to Use.typekit.net and 12% (5 requests) were made to Iiif.digitalcommonwealth.org. The less responsive or slowest element that took the longest time to load (1.4 sec) relates to the external source Iiif.digitalcommonwealth.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 121.9 kB (1%)

Content Size

15.4 MB

After Optimization

15.3 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Leventhalmap.org main page is 15.4 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. 65% of websites need less resources to load. Images take 15.3 MB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 61.1 kB

  • Original 77.1 kB
  • After minification 69.4 kB
  • After compression 16.1 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 61.1 kB or 79% of the original size.

Image Optimization

-0%

Potential reduce by 59.0 kB

  • Original 15.3 MB
  • After minification 15.2 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. Leventhal Map images are well optimized though.

JavaScript Optimization

-1%

Potential reduce by 1.1 kB

  • Original 84.6 kB
  • After minification 84.6 kB
  • After compression 83.6 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 811 B

  • Original 35.2 kB
  • After minification 35.2 kB
  • After compression 34.4 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. Leventhalmap.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 19 (61%)

Requests Now

31

After Optimization

12

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 31 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Leventhal Map. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 15 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

leventhalmap.org

leventhalmap.org

51 ms

www.leventhalmap.org

www.leventhalmap.org

131 ms

bootstrap.min.css

bootstrap.min.css

26 ms

slick.css

slick.css

76 ms

animate.min.css

animate.min.css

140 ms

style.css

style.css

144 ms

js

js

147 ms

jquery.min.js

jquery.min.js

167 ms

bootstrap.bundle.min.js

bootstrap.bundle.min.js

136 ms

slick.min.js

slick.min.js

137 ms

all.js

all.js

189 ms

jump.js

jump.js

175 ms

script.min.js

script.min.js

175 ms

1a74691e-40a4-11ec-96e5-06b4694bee2a.js

1a74691e-40a4-11ec-96e5-06b4694bee2a.js

824 ms

hnl4gif.css

hnl4gif.css

112 ms

p.css

p.css

106 ms

js

js

210 ms

analytics.js

analytics.js

391 ms

js

js

287 ms

gtm.js

gtm.js

286 ms

AGBYXHFF

AGBYXHFF

413 ms

MapCenter_allwhite.png

MapCenter_allwhite.png

187 ms

default.jpg

default.jpg

1084 ms

masterhighwaypla00char_0015.jpeg

masterhighwaypla00char_0015.jpeg

564 ms

bls.jpg

bls.jpg

639 ms

default.jpg

default.jpg

876 ms

default.jpg

default.jpg

874 ms

default.jpg

default.jpg

1398 ms

default.jpg

default.jpg

838 ms

d

d

229 ms

d

d

385 ms

d

d

389 ms

d

d

387 ms

d

d

387 ms

d

d

388 ms

d

d

455 ms

d

d

470 ms

conversion_async.js

conversion_async.js

225 ms

collect

collect

120 ms

124 ms

85 ms

Accessibility Review

leventhalmap.org 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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

leventhalmap.org 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

High

Page has valid source maps

SEO Factors

leventhalmap.org SEO score

95

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

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 Leventhalmap.org 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 Leventhalmap.org 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

leventhalmap.org

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