Access lawrencehallofscience.org. The Lawrence Hall of Science – The public science center of the University of California, Berkeley.

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value5.3 s

57/100

10%

TBT (Total Blocking Time)

Value460 ms

62/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value10.8 s

22/100

10%

lawrencehallofscience.org

21 ms

lawrencehallofscience.org

607 ms

js

176 ms

gtm.js

222 ms

style.min.css

16 ms

Our browser made a total of 53 requests to load all elements on the main page. We found that 91% of them (48 requests) were addressed to the original Lawrencehallofscience.org, 8% (4 requests) were made to Googletagmanager.com and 2% (1 request) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (607 ms) belongs to the original domain Lawrencehallofscience.org.

Content Size

4.4 MB

After Optimization

4.1 MB

In fact, the total size of Lawrencehallofscience.org main page is 4.4 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. Only a small number of websites need less resources to load. Images take 3.9 MB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 134.0 kB

Original 183.5 kB
After minification 180.2 kB
After compression 49.5 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 134.0 kB or 73% of the original size.

Image Optimization

-1%

Potential reduce by 33.1 kB

Original 3.9 MB
After minification 3.8 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. Lawrence Hall Of Science images are well optimized though.

JavaScript Optimization

-51%

Potential reduce by 91.0 kB

Original 177.0 kB
After minification 143.0 kB
After compression 86.0 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. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 91.0 kB or 51% of the original size.

CSS Optimization

-36%

Potential reduce by 61.6 kB

Original 173.3 kB
After minification 173.3 kB
After compression 111.8 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. Lawrencehallofscience.org needs all CSS files to be minified and compressed as it can save up to 61.6 kB or 36% of the original size.

Requests Now

After Optimization

The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Lawrence Hall Of Science. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 12 to 1 for JavaScripts and as a result speed up the page load time.