Analyze Smithsonian Learning Lab: Discover, Create, Share

Smithsonian Learning Lab is your destination for millions of carefully curated, easily accessible, customizable, and shareable open educational resources.

Page load speed analysis

  • 82/100

    Good result
  • 6

    Successful tests
  • 2

    Failed tests
  • First response

    23 ms

  • Resources loaded

    141 ms

  • Page rendered

    114 ms

  • Total page load time

    278 ms

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We analyzed page load time and found that the first response time was 23 ms and then it took 255 ms to load all DOM resources and completely render a web page. This is an excellent result, as only a small number of websites can load faster.

Page optimization

  • HTML 11.8 kB
    Images 248.6 kB
    Javascripts 144.2 kB
    CSS 0 B

    In fact, the total size of main page is 404.6 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. 25% of websites need less resources to load. Images take 248.6 kB which makes up the majority of the site volume.

    • Original 11.8 kB
    • After minification 10.7 kB
    • After compression 3.1 kB

    HTML optimization

    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 8.7 kB or 73% of the original size.

    • Original 248.6 kB
    • After optimization 248.5 kB

    Image optimization

    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. Smithsonian Education images are well optimized though.

    • Original 144.2 kB
    • After minification 140.5 kB
    • After compression 49.0 kB

    JavaScript optimization

    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 95.2 kB or 66% of the original size.

Network requests diagram

  • global.js
  • main_promo.js
  • triggerParams.js
  • webtrends.js
  • si_nv_educators_off.gif
  • si_nv_educators_over.gif
  • si_nv_educators_on.gif
  • si_nv_families_off.gif
  • si_nv_families_over.gif
  • si_nv_families_on.gif
  • si_nv_students_off.gif
  • si_nv_students_over.gif
  • si_nv_students_on.gif
  • si_home_nv_edu.gif
  • si_home_nv_edu_over.gif
  • new_edu_e4a.jpg
  • si_home_nv_stu_off.gif
  • si_home_nv_stu_over.gif
  • new_stu_e4a.jpg
  • si_home_nv_fam.gif
  • si_home_nv_fam_over.gif
  • new_fam_e4a.jpg
  • new_welcome_e4a.jpg
  • si_home_logo.gif
  • si_home_ci_tree.jpg
  • promo_lg_siyc_deer.gif
  • spacer.gif
  • si_mn_endline.gif
  • si_mn_nv_logo_footer.gif
  • si_gl_nv_about_v2.gif
  • si_gl_nv_contact.gif
  • si_gl_nv_sitemap.gif
  • si_gl_nv_usage.gif
  • si_gl_nv_privacy_v2.gif
  • si_gl_nv_subscribe.gif
  • si_mn_nv_si.gif
  • si_mn_nv_websites.gif
  • si_mn_nv_shop.gif
  • wtid.js
  • ga.js
  • dcs.gif
  • __utm.gif

Our browser made a total of 43 requests to load all elements on the main page. We found that 88% of them (38 requests) were addressed to the original, 5% (2 requests) were made to and 5% (2 requests) were made to The less responsive or slowest element that took the longest time to load (44 ms) belongs to the original domain

Additional info on


The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Smithsonian Education. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.







Possible request optimization









Normal result

IP address uses IP address which is currently shared with 4 other domains. The more sites share the same IP address, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Poor result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 86400
NS 86400
NS 86400

900 Mname:
Serial: 509291849
Refresh: 1200
Retry: 180
Expire: 1209600
Minimum-ttl: 900

3600 Txt: v=spf1 -all

Language and encoding

Normal result


EN en language flag


N/A  language flag





Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that 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.

HTTPS certificate

SSL Certificate has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

Country of origin for 84.4% of all visits is United States. It’s good for that their server is also located in United States, as that enables the majority of their visitors to benefit from a much faster page load time.

Good result

Poor result

Social Sharing Optimization

Open Graph description is not detected on the main page of Smithsonian Education. 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:

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