Tools & Wizards About Us
castroesilva.com screenshot

Report Summary

  • 62

    Performance

    Renders faster than
    76% of other websites

  • 62

    Accessibility

    Visual factors better than
    that of 28% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 69

    SEO

    Google-friendlier than
    28% of websites

castroesilva.com

Livraria Castro e Silva, Alfarrabista, Rare and Antique Books, Sebo, Livros antigos, Libros antiguos, Out-of-Print and Old books, Livre ancien, Antiqu...

Page Load Speed

2.6 sec in total

First Response

271 ms

Resources Loaded

2.2 sec

Page Rendered

146 ms

castroesilva.com screenshot

About Website

Click here to check amazing Castro E Silva content. Otherwise, check out these important facts you probably never knew about castroesilva.com

Fundada em 1957 a Livraria Castro e Silva é uma organização comercial de bibliografia, bem conhecida no mercado de livro antigo e alfarrabista nacional e internacional, sendo uma das mais conceituadas...

Visit castroesilva.com

Key Findings

We analyzed Castroesilva.com page load time and found that the first response time was 271 ms and then it took 2.3 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

castroesilva.com performance score

62

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.0 s

84/100

10%

LCP (Largest Contentful Paint)

Value6.6 s

8/100

25%

SI (Speed Index)

Value3.6 s

87/100

10%

TBT (Total Blocking Time)

Value350 ms

74/100

30%

CLS (Cumulative Layout Shift)

Value0.123

83/100

15%

TTI (Time to Interactive)

Value4.6 s

81/100

10%

Network Requests Diagram

castroesilva.com

271 ms

castroesilva.com

389 ms

default.asp

104 ms

index.asp

457 ms

style.css

95 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 88% of them (38 requests) were addressed to the original Castroesilva.com, 5% (2 requests) were made to Googletagmanager.com and 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (861 ms) belongs to the original domain Castroesilva.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 56.0 kB (11%)

Content Size

504.4 kB

After Optimization

448.5 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Castroesilva.com main page is 504.4 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. 30% of websites need less resources to load. Images take 453.1 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 23.7 kB

  • Original 29.0 kB
  • After minification 28.2 kB
  • After compression 5.4 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 23.7 kB or 82% of the original size.

Image Optimization

-7%

Potential reduce by 31.8 kB

  • Original 453.1 kB
  • After minification 421.3 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. Castro E Silva images are well optimized though.

JavaScript Optimization

-0%

Potential reduce by 50 B

  • Original 21.0 kB
  • After minification 21.0 kB
  • After compression 20.9 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. This website has mostly compressed JavaScripts.

CSS Optimization

-33%

Potential reduce by 427 B

  • Original 1.3 kB
  • After minification 1.3 kB
  • After compression 865 B

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. Castroesilva.com needs all CSS files to be minified and compressed as it can save up to 427 B or 33% of the original size.

Requests Breakdown

Number of requests can be reduced by 6 (16%)

Requests Now

38

After Optimization

32

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 38 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Castro E Silva. 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.

Network Requests Diagram

castroesilva.com

castroesilva.com

271 ms

castroesilva.com

castroesilva.com

389 ms

default.asp

default.asp

104 ms

index.asp

index.asp

457 ms

style.css

style.css

95 ms

js

js

70 ms

analytics.js

analytics.js

22 ms

116 ms

fundo2.jpg

fundo2.jpg

114 ms

Barrabottom.gif

Barrabottom.gif

196 ms

livros.png

livros.png

290 ms

header_preto.png

header_preto.png

353 ms

ilaba2.png

ilaba2.png

523 ms

destaque3.jpg

destaque3.jpg

353 ms

descricao.png

descricao.png

385 ms

entrar.png

entrar.png

385 ms

registe-se.png

registe-se.png

384 ms

UK.gif

UK.gif

438 ms

bar.png

bar.png

439 ms

1402NM021_0.jpg

1402NM021_0.jpg

478 ms

4popular.gif

4popular.gif

478 ms

1603JC024_0.jpg

1603JC024_0.jpg

479 ms

2popular.gif

2popular.gif

523 ms

1404JC120_0.jpg

1404JC120_0.jpg

524 ms

1806CS002_0.jpg

1806CS002_0.jpg

572 ms

1popular.gif

1popular.gif

572 ms

2201AD001_0.jpg

2201AD001_0.jpg

572 ms

1502JC019_0.png

1502JC019_0.png

608 ms

0popular.gif

0popular.gif

608 ms

2112AD002_0.jpg

2112AD002_0.jpg

612 ms

2005JC002_0.jpg

2005JC002_0.jpg

665 ms

pesquisar.png

pesquisar.png

665 ms

MB.png

MB.png

665 ms

paypal.png

paypal.png

692 ms

mastercard.png

mastercard.png

692 ms

visa.png

visa.png

697 ms

AmericanExpress.png

AmericanExpress.png

757 ms

escriba2.jpg

escriba2.jpg

759 ms

CSI1.png

CSI1.png

759 ms

inferior2.jpg

inferior2.jpg

861 ms

collect

collect

12 ms

Gotham_Book_Regular.otf

Gotham_Book_Regular.otf

735 ms

js

js

39 ms

Accessibility Review

castroesilva.com accessibility score

62

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

Names and labels

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.

Impact

Issue

High

Image elements do not have [alt] attributes

High

<input type="image"> elements do not have [alt] text

High

Links do not have a discernible name

Best Practices

castroesilva.com best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Displays images with incorrect aspect ratio

High

Serves images with low resolution

SEO Factors

castroesilva.com SEO score

69

Search Engine Optimization Advices

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    PT

  • Language Claimed

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Castroesilva.com can be misinterpreted by Google and other search engines. Our service has detected that Portuguese is used on the page, and it does not match the claimed English language. Our system also found out that Castroesilva.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

castroesilva.com

Open Graph description is not detected on the main page of Castro E Silva. 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: