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name

value

score

weighting

FCP (First Contentful Paint)

Value4.6 s

14/100

10%

LCP (Largest Contentful Paint)

Value26.1 s

0/100

25%

SI (Speed Index)

Value7.8 s

23/100

10%

TBT (Total Blocking Time)

Value2,030 ms

7/100

30%

CLS (Cumulative Layout Shift)

Value0.218

57/100

15%

TTI (Time to Interactive)

Value7.1 s

52/100

10%

opticalillusionsmuseum.com

297 ms

main.css

112 ms

colorscheme.css

190 ms

style.css

189 ms

live_tinc.js

191 ms

Our browser made a total of 53 requests to load all elements on the main page. We found that 34% of them (18 requests) were addressed to the original Opticalillusionsmuseum.com, 42% (22 requests) were made to Static.xx.fbcdn.net and 13% (7 requests) were made to Scontent.xx.fbcdn.net. The less responsive or slowest element that took the longest time to load (680 ms) belongs to the original domain Opticalillusionsmuseum.com.

Content Size

413.5 kB

After Optimization

381.9 kB

In fact, the total size of Opticalillusionsmuseum.com main page is 413.5 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. 35% of websites need less resources to load. Images take 385.6 kB which makes up the majority of the site volume.

HTML Optimization

-73%

Potential reduce by 5.8 kB

Original 7.9 kB
After minification 7.8 kB
After compression 2.1 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 5.8 kB or 73% of the original size.

Image Optimization

-2%

Potential reduce by 8.6 kB

Original 385.6 kB
After minification 377.1 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. Opticalillusionsmuseum images are well optimized though.

JavaScript Optimization

-83%

Potential reduce by 4.1 kB

Original 4.9 kB
After minification 2.5 kB
After compression 819 B

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 4.1 kB or 83% of the original size.

CSS Optimization

-87%

Potential reduce by 13.2 kB

Original 15.1 kB
After minification 9.0 kB
After compression 1.9 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. Opticalillusionsmuseum.com needs all CSS files to be minified and compressed as it can save up to 13.2 kB or 87% of the original size.

Requests Now

After Optimization

The browser has sent 52 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opticalillusionsmuseum. 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 from 8 to 1 for CSS 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 the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

High

Links do not have a discernible name

These items highlight common accessibility best practices.

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

Search Engine Optimization Advices

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

High

Links are not crawlable

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

EN
Language Claimed

N/A
Encoding

UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Opticalillusionsmuseum.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 Opticalillusionsmuseum.com 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.

Social Sharing Optimization

opticalillusionsmuseum.com

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

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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

opticalillusionsmuseum.com

main.css

colorscheme.css

style.css

live_tinc.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

opticalillusionsmuseum.com

main.css

colorscheme.css

style.css

live_tinc.js

cabecera-2.jpg

logo-prueba-1.jpg

left_pane_bg.jpg

n1.gif

sub_menu_top_bg.gif

content_bg.jpg

cartel-400.jpg

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mini-skull.jpg

logoprueba.jpg

logo-directory-def.jpg

mail.jpg

bot_left_pane.gif

likebox.php

410ucuAGgaJ.css

tSbl8xBI27R.css

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Oagsvfb4VWi.js

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1FCa-btixu2.js

69392_151331431579039_4451971_n.jpg

safe_image.php

safe_image.php

safe_image.php

safe_image.php

safe_image.php

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