Analyze LIGO Lab | Caltech | MIT

The Laser Interferometer Gravitational-Wave Observatory (LIGO) consists of two widely separated installations within the United States — one in Hanford Washington and the other in Livingston, Louisian...

Page load speed analysis

  • 70/100

    Good result
  • 7

    Successful tests
  • 1

    Failed test
  • First response

    235 ms

  • Resources loaded

    2.1 sec

  • Page rendered

    172 ms

  • Total page load time

    2.6 sec

Visit now to see the best up-to-date LIGO Caltech content for United States and also check out these interesting facts you probably never knew about

We analyzed page load time and found that the first response time was 235 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 40% of websites can load faster.

Page optimization

  • HTML 22.8 kB
    Images 1.8 MB
    Javascripts 187.7 kB
    CSS 332.1 kB

    In fact, the total size of main page is 2.3 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. 35% of websites need less resources to load. Images take 1.8 MB which makes up the majority of the site volume.

    • Original 22.8 kB
    • After minification 22.8 kB
    • After compression 6.0 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 16.9 kB or 74% of the original size.

    • Original 1.8 MB
    • After optimization 1.7 MB

    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. LIGO Caltech images are well optimized though.

    • Original 187.7 kB
    • After minification 187.7 kB
    • After compression 64.5 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 123.3 kB or 66% of the original size.

    • Original 332.1 kB
    • After minification 192.0 kB
    • After compression 30.1 kB

    CSS optimization

    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. needs all CSS files to be minified and compressed as it can save up to 302.0 kB or 91% of the original size.

Network requests diagram

  • css
  • application-ab1d0419d3e5e0f832031e2e58a42f27.css
  • ligo_signals-1638717264243aca66a201c1f0d50559.png
  • DetectionSlide.jpg
  • DetectionSlide.jpg
  • DetectionSlide.jpg
  • DetectionSlide.jpg
  • ligo20160211_Tn.jpg
  • ligo20160211_Tn.jpg
  • ligo20160211_Tn.jpg
  • ligo20160211_Tn.jpg
  • ligoChipSlide.jpg
  • ligoChipSlide.jpg
  • ligoChipSlide.jpg
  • ligoChipSlide.jpg
  • application-ee380013684e1a3491edffdc74bc9484.js
  • what_slide-ce3596915df0767051e5d7d29c27958a.jpg
  • congressional-testimony.png
  • footer_caltech-dffffad68d75521d67f82d4d77917573.png
  • footer_mit-1089305c79c9fb3f86d3c36e6246efe5.png
  • footer_nsf-b095d1e913dd555437f6682a15d70afb.png
  • footer_lsc-f75e18cb88af4537a57f048612242fd5.png
  • analytics.js
  • purple_page_background.jpg
  • purple_site_navigation_bar.jpg
  • cJZKeOuBrn4kERxqtaUH3T8E0i7KZn-EPnyo3HZu7kw.woff
  • DXI1ORHCpsQm3Vp6mXoaTXhCUOGz7vYGh680lGh-uXM.woff
  • k3k702ZOKiLJc3WVjuplzHhCUOGz7vYGh680lGh-uXM.woff
  • -SXnV4mZjf4oh1IBw13WZw.woff
  • fontawesome-webfont-f2a9004d897733ee518fb3d48f0fbb53.woff
  • collect

Our browser made a total of 33 requests to load all elements on the main page. We found that 79% of them (26 requests) were addressed to the original, 12% (4 requests) were made to and 6% (2 requests) were made to The less responsive or slowest element that took the longest time to load (1.2 sec) belongs to the original domain

Additional info on


The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of LIGO Caltech. According to our analytics all requests are already optimized.









Possible request optimization











Normal result


As for redirects, our browser was forwarded to before it reached this domain.

IP address

This IP address is dedicated to This is the best domain hosting practice .

Normal result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 300
NS 300
NS 300
NS 300

300 Mname:
Serial: 2020091100
Refresh: 10800
Retry: 900
Expire: 604800
Minimum-ttl: 3600

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.

Poor result

Visitor World Map

Country of origin for 48.9% 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

Normal result

Social Sharing Optimization

Open Graph description is not detected on the main page of LIGO Caltech. 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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