Access apod.com. APOD: 2015 June 16 - APOD is 20 Years Old Today

name

value

score

weighting

FCP (First Contentful Paint)

Value0.8 s

100/100

10%

LCP (Largest Contentful Paint)

Value0.8 s

100/100

25%

SI (Speed Index)

Value0.9 s

100/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0.344

32/100

15%

TTI (Time to Interactive)

Value0.8 s

100/100

10%

apod.com

138 ms

federated-analytics.all.min.js

38 ms

vermeer_stevenson_960.jpg

348 ms

Our browser made a total of 3 requests to load all elements on the main page. We found that all of those requests were addressed to Apod.com and no external sources were called. The less responsive or slowest element that took the longest time to load (348 ms) belongs to the original domain Apod.com.

Content Size

258.6 kB

After Optimization

255.6 kB

In fact, the total size of Apod.com main page is 258.6 kB. This result falls within a vast category (top 1 000 000) of heavyweight, probably not optimized, and thus slow loading web pages. Only 5% of websites need less resources to load. Images take 253.7 kB which makes up the majority of the site volume.

HTML Optimization

-59%

Potential reduce by 2.9 kB

Original 4.9 kB
After minification 4.8 kB
After compression 2.0 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 2.9 kB or 59% of the original size.

Image Optimization

-0%

Potential reduce by 74 B

Original 253.7 kB
After minification 253.6 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. APOD images are well optimized though.

Requests Now

After Optimization

The browser has sent 1 CSS, Javascripts, AJAX and image requests in order to completely render the main page of APOD. According to our analytics all requests are already optimized.

Accessibility Issues

These are opportunities to improve the interpretation of your content by users in different locales.

High

<html> element does not have a [lang] attribute

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

High

Serves images with low resolution

High

Browser errors were logged to the console

Search Engine Optimization Advices

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Apod.com 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 Apod.com main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.

Social Sharing Optimization

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