Analyze California Academy of Sciences in San Francisco, CA

The California Academy of Sciences is a science museum—and scientific and educational institution—located in San Francisco's Golden Gate Park.

Page load speed analysis

  • 69/100

    Normal result
  • 8

    Successful tests
  • 0

    Failed test
  • First response

    22 ms

  • Resources loaded

    861 ms

  • Page rendered

    280 ms

  • Total page load time

    1.2 sec

Welcome to homepage info - get ready to check CA L Academy best content for United States right away, or after learning these important things about

We analyzed page load time and found that the first response time was 22 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster.

Page optimization

  • HTML 352.4 kB
    Images 9.0 MB
    Javascripts 909.7 kB
    CSS 1.9 MB

    In fact, the total size of main page is 12.1 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. Only a small number of websites need less resources to load. Images take 9.0 MB which makes up the majority of the site volume.

    • Original 352.4 kB
    • After minification 343.2 kB
    • After compression 77.0 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 275.4 kB or 78% of the original size.

    • Original 9.0 MB
    • After optimization 8.4 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. CA L Academy images are well optimized though.

    • Original 909.7 kB
    • After minification 777.9 kB
    • After compression 256.5 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 653.2 kB or 72% of the original size.

    • Original 1.9 MB
    • After minification 1.8 MB
    • After compression 322.6 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 1.5 MB or 83% of the original size.

Network requests diagram

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  • fonts.css
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  • jquery.min.js
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  • element.js
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  • 95EF2AD6DC824DCCC.css
  • gtm.js
  • magnifying-glass.png
  • 50grey.gif
  • empty.gif
  • logo-horiz.png
  • arrow.png
  • col_l0a9896-edit.jpg
  • 1200x900_mam_150911.png
  • 1800x1200_sherman_chu_-_swamp_party_tis_the_season.jpg
  • tours_hero-.jpg
  • penguins_6361_final_v2_lores.jpg
  • academy_store_hero2.jpg
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  • membership_hero_lg_color_test-.jpg
  • support_education_science_demonstration-.jpg
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  • footer-roof-dusk.jpg
  • arrow-blue-large.png
  • logo-mark.png
  • facebook-large.png
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  • translateelement.css
  • main.js
  • google-large.png
  • instagram-large.png
  • youtube-large.png
  • bullet-white.png
  • analytics.js
  • oct.js
  • munchkin-beta.js
  • fbds.js
  • loader.js
  • play-button.png
  • pcr_fo.svg
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  • 7563.js
  • element_main.js
  • munchkin.js
  • ec.js
  • clarivoy.js
  • adsct
  • adsct
  • visitWebPage
  • collect
  • collect
  • translate_24dp.png
  • l
  • googlelogo_color_42x16dp.png
  • pageviews
  • select-arrow.png
  • aquarium_1_8618-.jpg
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  • big-blue-jelly.jpg
  • frog.gif
  • penguin_cam_midfeature_2-3.jpg

Our browser made a total of 102 requests to load all elements on the main page. We found that 74% of them (75 requests) were addressed to the original, 4% (4 requests) were made to and 3% (3 requests) were made to The less responsive or slowest element that took the longest time to load (205 ms) relates to the external source

Additional info on


The browser has sent 100 CSS, Javascripts, AJAX and image requests in order to completely render the main page of CA L Academy. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 19 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.











Possible request optimization













Normal result

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 59
A 59
NS 3600
NS 3600
NS 3600

Language and encoding

Good result


EN en language flag


EN en 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 it matches the claimed language. 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 77.5% 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 data is detected on the main page of CA L Academy. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

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