3 sec in total
516 ms
1.9 sec
561 ms
Welcome to professionaldevelopment.gilderlehrman.org homepage info - get ready to check Professionaldevelopment Gilder Lehrman best content for United States right away, or after learning these important things about professionaldevelopment.gilderlehrman.org
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Visit professionaldevelopment.gilderlehrman.orgWe analyzed Professionaldevelopment.gilderlehrman.org page load time and found that the first response time was 516 ms and then it took 2.5 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.
professionaldevelopment.gilderlehrman.org performance score
name
value
score
weighting
Value3.8 s
26/100
10%
Value5.4 s
20/100
25%
Value4.1 s
80/100
10%
Value280 ms
81/100
30%
Value0.024
100/100
15%
Value6.0 s
65/100
10%
516 ms
43 ms
11 ms
24 ms
21 ms
Our browser made a total of 67 requests to load all elements on the main page. We found that 36% of them (24 requests) were addressed to the original Professionaldevelopment.gilderlehrman.org, 24% (16 requests) were made to A.tiles.mapbox.com and 10% (7 requests) were made to B.tiles.mapbox.com. The less responsive or slowest element that took the longest time to load (639 ms) relates to the external source A.tiles.mapbox.com.
Page size can be reduced by 1.5 MB (64%)
2.4 MB
871.6 kB
In fact, the total size of Professionaldevelopment.gilderlehrman.org main page is 2.4 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. 55% of websites need less resources to load. Javascripts take 1.5 MB which makes up the majority of the site volume.
Potential reduce by 21.1 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 21.1 kB or 67% of the original size.
Potential reduce by 4.3 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. Professionaldevelopment Gilder Lehrman images are well optimized though.
Potential reduce by 1.2 MB
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 1.2 MB or 77% of the original size.
Potential reduce by 356.3 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. Professionaldevelopment.gilderlehrman.org needs all CSS files to be minified and compressed as it can save up to 356.3 kB or 85% of the original size.
Number of requests can be reduced by 39 (62%)
63
24
The browser has sent 63 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Professionaldevelopment Gilder Lehrman. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 27 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.
professionaldevelopment.gilderlehrman.org
516 ms
jquery.min.js
43 ms
bootstrap.min.js
11 ms
css_e8ab1fe0da2b464b3fa60bab367b972a.css
24 ms
css_d74aeaa7e6b1f5c3ca8434ea791d3514.css
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jquery-1.6.4.min.js
20 ms
drupal.js
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fb.js
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ui.core.min.js
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ui.datepicker.min.js
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flowplayer-3.2.6.min.js
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gli_mweb.js
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gli_resource_list.js
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UTIL.js
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nkbase.js
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nkbase_favorites.js
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nkbase_header_image.js
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og.js
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panels.js
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uc_roles.js
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uc_varprice_show_arb.js
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dropdown.js
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GLI.js
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css
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gli_logo.png
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millergli.kd0hlkhp.html
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all.js
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analytics.js
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tlthcollage.jpg
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united.jpg
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gTHiwyxi6S7iiHpqAoiE3HhCUOGz7vYGh680lGh-uXM.woff
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player.js
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player.css
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ga.js
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vuid.min.js
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embed.js
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mapbox.css
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embed.css
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features.json
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professionaldevelopment.gilderlehrman.org accessibility score
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
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
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Links do not have a discernible name
professionaldevelopment.gilderlehrman.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
professionaldevelopment.gilderlehrman.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Professionaldevelopment.gilderlehrman.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 Professionaldevelopment.gilderlehrman.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.
professionaldevelopment.gilderlehrman.org
Open Graph description is not detected on the main page of Professionaldevelopment Gilder Lehrman. 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: