Tools & Wizards About Us

Report Summary

  • 15

    Performance

    Renders faster than
    27% of other websites

  • 77

    Accessibility

    Visual factors better than
    that of 44% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 77

    SEO

    Google-friendlier than
    36% of websites

olliscience.com

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Page Load Speed

1.4 sec in total

First Response

31 ms

Resources Loaded

1.3 sec

Page Rendered

64 ms

About Website

Visit olliscience.com now to see the best up-to-date Olliscience content for France and also check out these interesting facts you probably never knew about olliscience.com

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Key Findings

We analyzed Olliscience.com page load time and found that the first response time was 31 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.

Performance Metrics

olliscience.com performance score

15

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.6 s

33/100

10%

LCP (Largest Contentful Paint)

Value13.3 s

0/100

25%

SI (Speed Index)

Value6.4 s

40/100

10%

TBT (Total Blocking Time)

Value1,330 ms

17/100

30%

CLS (Cumulative Layout Shift)

Value0.584

11/100

15%

TTI (Time to Interactive)

Value12.6 s

14/100

10%

Network Requests Diagram

olliscience.com

31 ms

www.olliscience.com

430 ms

chunk-vendors.min.js

792 ms

app.min.js

684 ms

grapesjs-preset-webpage.front.js

418 ms

Our browser made a total of 26 requests to load all elements on the main page. We found that 38% of them (10 requests) were addressed to the original Olliscience.com, 50% (13 requests) were made to Fonts.googleapis.com and 8% (2 requests) were made to Cdn.jsdelivr.net. The less responsive or slowest element that took the longest time to load (811 ms) belongs to the original domain Olliscience.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.8 kB (1%)

Content Size

342.2 kB

After Optimization

340.4 kB

  • HTML
  • JavaScript
  • CSS

In fact, the total size of Olliscience.com main page is 342.2 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. Javascripts take 298.4 kB which makes up the majority of the site volume.

HTML Optimization

-65%

Potential reduce by 852 B

  • Original 1.3 kB
  • After minification 1.1 kB
  • After compression 456 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. This page needs HTML code to be minified as it can gain 160 B, which is 12% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 852 B or 65% of the original size.

JavaScript Optimization

-0%

Potential reduce by 45 B

  • Original 298.4 kB
  • After minification 298.4 kB
  • After compression 298.4 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

-2%

Potential reduce by 898 B

  • Original 42.4 kB
  • After minification 42.4 kB
  • After compression 41.5 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. Olliscience.com has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 22 (92%)

Requests Now

24

After Optimization

2

  • JavaScript
  • CSS

The browser has sent 24 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Olliscience. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 19 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

olliscience.com accessibility score

77

Accessibility Issues

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

Heading elements are not in a sequentially-descending order

Internationalization and localization

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

Impact

Issue

High

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

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

Links do not have a discernible name

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

olliscience.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

olliscience.com SEO score

77

Search Engine Optimization Advices

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

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

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

    N/A

  • Language Claimed

    N/A

  • Encoding

    UTF-8

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

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