Access blockbook.com.

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

70/100

10%

LCP (Largest Contentful Paint)

Value2.9 s

79/100

25%

SI (Speed Index)

Value3.3 s

90/100

10%

TBT (Total Blocking Time)

Value2,400 ms

5/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value9.8 s

27/100

10%

blockbook.com

119 ms

450276_PosterStore.htm

250 ms

450284_PosterStore.htm

263 ms

450280_PosterStore.htm

238 ms

bblogo.gif

113 ms

Our browser made a total of 103 requests to load all elements on the main page. We found that 15% of them (15 requests) were addressed to the original Blockbook.com, 72% (74 requests) were made to Imagecache6.allposters.com and 10% (10 requests) were made to Imagecache2.allposters.com. The less responsive or slowest element that took the longest time to load (931 ms) relates to the external source Imagecache6.allposters.com.

Content Size

3.5 kB

After Optimization

742 B

In fact, the total size of Blockbook.com main page is 3.5 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. 50% of websites need less resources to load. HTML takes 3.5 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 2.7 kB

Original 3.5 kB
After minification 3.5 kB
After compression 742 B

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 2.7 kB or 79% of the original size.

Requests Now

102

After Optimization

The browser has sent 102 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blockbook. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.

Accessibility Issues

These are opportunities to improve the legibility of your content.

High

Background and foreground colors do not have a sufficient contrast ratio.

These are opportunities to improve keyboard navigation in your application.

High

Heading elements are not in a sequentially-descending order

Areas of Improvement

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

To appear in search results, crawlers need access to your app.

High

Page is blocked from indexing

High

robots.txt is not valid

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

High

Document uses legible font sizes

Language and Encoding

Language Detected

N/A
Language Claimed

N/A
Encoding

N/A

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blockbook.com can be misinterpreted by Google and other search engines. Unfortunately we cannot identify language used on the page (probably there is a mix of languages, too little text or something else) and no language is claimed in <html> or <meta> tags either. Our system also found out that Blockbook.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

blockbook.com

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

Report Summary

Performance

Accessibility

Best Practices

SEO

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

blockbook.com

450276_PosterStore.htm

450284_PosterStore.htm

450280_PosterStore.htm

bblogo.gif

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

blockbook.com

450276_PosterStore.htm

450284_PosterStore.htm

450280_PosterStore.htm

bblogo.gif

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also.gif

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ps_top_left.gif

PromotionalBanners.asp

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