Tools & Wizards About Us
serienegra.es screenshot

Report Summary

  • 25

    Performance

    Renders faster than
    44% of other websites

  • 74

    Accessibility

    Visual factors better than
    that of 41% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 100

    SEO

    Google-friendlier than
    95% of websites

serienegra.es

Serie Negra: Novela negra, libros policíacos y autores de suspense.

Page Load Speed

5.9 sec in total

First Response

248 ms

Resources Loaded

4.9 sec

Page Rendered

728 ms

serienegra.es screenshot

About Website

Welcome to serienegra.es homepage info - get ready to check Serie Negra best content for Spain right away, or after learning these important things about serienegra.es

Serie Negra Esta colección de RBA Libros propone a los lectores una completa panorámica de la novela policiaca desde sus inicios hasta el presente.

Visit serienegra.es

Key Findings

We analyzed Serienegra.es page load time and found that the first response time was 248 ms and then it took 5.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 75% of websites can load faster.

Performance Metrics

serienegra.es performance score

25

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.2 s

19/100

10%

LCP (Largest Contentful Paint)

Value4.8 s

31/100

25%

SI (Speed Index)

Value11.5 s

5/100

10%

TBT (Total Blocking Time)

Value23,320 ms

0/100

30%

CLS (Cumulative Layout Shift)

Value0.036

100/100

15%

TTI (Time to Interactive)

Value38.0 s

0/100

10%

Network Requests Diagram

serienegra.es

248 ms

www.serienegra.es

581 ms

cache.web.base.css

799 ms

widgets.js

132 ms

css

28 ms

Our browser made a total of 86 requests to load all elements on the main page. We found that 70% of them (60 requests) were addressed to the original Serienegra.es, 5% (4 requests) were made to Sdk.privacy-center.org and 3% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (2.8 sec) belongs to the original domain Serienegra.es.

Page Optimization Overview & Recommendations

Page size can be reduced by 840.0 kB (46%)

Content Size

1.8 MB

After Optimization

998.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Serienegra.es main page is 1.8 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. 60% of websites need less resources to load. Images take 1.3 MB which makes up the majority of the site volume.

HTML Optimization

-81%

Potential reduce by 102.7 kB

  • Original 126.5 kB
  • After minification 125.7 kB
  • After compression 23.8 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 102.7 kB or 81% of the original size.

Image Optimization

-32%

Potential reduce by 426.6 kB

  • Original 1.3 MB
  • After minification 888.3 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. Obviously, Serie Negra needs image optimization as it can save up to 426.6 kB or 32% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-55%

Potential reduce by 57.0 kB

  • Original 104.6 kB
  • After minification 103.6 kB
  • After compression 47.6 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 57.0 kB or 55% of the original size.

CSS Optimization

-87%

Potential reduce by 253.7 kB

  • Original 292.7 kB
  • After minification 289.9 kB
  • After compression 39.0 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. Serienegra.es needs all CSS files to be minified and compressed as it can save up to 253.7 kB or 87% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (24%)

Requests Now

82

After Optimization

62

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 82 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Serie Negra. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 16 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

serienegra.es

serienegra.es

248 ms

www.serienegra.es

www.serienegra.es

581 ms

cache.web.base.css

cache.web.base.css

799 ms

widgets.js

widgets.js

132 ms

css

css

28 ms

font-awesome.min.css

font-awesome.min.css

30 ms

jquery-ui.css

jquery-ui.css

222 ms

videojs.bundle.css

videojs.bundle.css

232 ms

juxtapose.css

juxtapose.css

79 ms

loader.js

loader.js

962 ms

require.min.js

require.min.js

370 ms

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sam-shelstad_9550593b_220x290.jpg

371 ms

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521 ms

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david-jpy-web-22_7122f657_220x290.png

787 ms

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519 ms

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519 ms

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583 ms

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582 ms

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816 ms

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816 ms

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819 ms

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903 ms

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906 ms

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1331 ms

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1153 ms

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1154 ms

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1156 ms

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1227 ms

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1267 ms

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1719 ms

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1717 ms

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1717 ms

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1856 ms

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1726 ms

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1777 ms

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2203 ms

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2358 ms

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2203 ms

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2212 ms

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2357 ms

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2210 ms

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2358 ms

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2358 ms

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2450 ms

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2500 ms

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2754 ms

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2754 ms

icomoon.ttf

icomoon.ttf

361 ms

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2244 ms

christofferpetersenweb_4f2018c3.jpg

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2243 ms

require.main.js

require.main.js

2239 ms

ian-rankin_ad9d7d17_220x290.jpg

ian-rankin_ad9d7d17_220x290.jpg

2192 ms

be.js

be.js

56 ms

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kathy-reich_8d321545_220x290.jpg

2311 ms

c3po.jpg

c3po.jpg

159 ms

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2348 ms

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maj-sjowall_2cd02447_220x290.jpg

2290 ms

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2288 ms

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2429 ms

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2289 ms

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2397 ms

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2446 ms

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sdk.f093cea061ce41130aaba2e5ca185a70f8cd1c3c.js

8 ms

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polyfills.f093cea061ce41130aaba2e5ca185a70f8cd1c3c.js

46 ms

logo-serienegra-bw.svg

logo-serienegra-bw.svg

2116 ms

serie-negra@2x.png

serie-negra@2x.png

113 ms

menu-brush.svg

menu-brush.svg

559 ms

bg-home.png

bg-home.png

1134 ms

bg-gris.png

bg-gris.png

1124 ms

autores-brush.png

autores-brush.png

880 ms

footer-brush2.svg

footer-brush2.svg

489 ms

serie-negra-white.svg

serie-negra-white.svg

491 ms

current

current

95 ms

ui-gdpr-es.f093cea061ce41130aaba2e5ca185a70f8cd1c3c.js

ui-gdpr-es.f093cea061ce41130aaba2e5ca185a70f8cd1c3c.js

18 ms

gtm.js

gtm.js

18 ms

gtm.js

gtm.js

50 ms

dc.js

dc.js

13 ms

analytics.js

analytics.js

20 ms

hotjar-995686.js

hotjar-995686.js

126 ms

gpt.js

gpt.js

63 ms

inpage_linkid.js

inpage_linkid.js

24 ms

collect

collect

88 ms

__utm.gif

__utm.gif

66 ms

pubads_impl_2022092201.js

pubads_impl_2022092201.js

40 ms

ppub_config

ppub_config

127 ms

require.app.min.js

require.app.min.js

653 ms

Accessibility Review

serienegra.es accessibility score

74

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

ARIA input fields do not have accessible names

High

ARIA IDs are not unique

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

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

Form elements do not have associated labels

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

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

Best Practices

serienegra.es best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

serienegra.es SEO score

100

Search Engine Optimization Advices

Mobile Friendly

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/).

Impact

Issue

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    ES

  • Language Claimed

    ES

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Serienegra.es can be misinterpreted by Google and other search engines. Our service has detected that Spanish is used on the page, and it matches the claimed language. Our system also found out that Serienegra.es 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

serienegra.es

Open Graph data is detected on the main page of Serie Negra. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: