optimizely .com

2.91

Results collected 2024-04-05 from https://www.optimizely.com/

Lighthouse Performance

1.30

The website is quite slow.
Total Blocking Time 1.00
Largest Contentful Paint: 8.0 s 1.00
Cumulative Layout Shift 5.00
First Contentful Paint: 5.8 s 1.00
Speed Index 1.00
Avoid an excessive DOM size 1.00
Eliminate render-blocking resources 1.00
First Meaningful Paint: 5.8 s 1.00
Largest Contentful Paint element 1.00
Max Potential First Input Delay 1.00
Minimize main-thread work 1.00
Preconnect to required origins 1.00
Reduce JavaScript execution time 1.00
Reduce the impact of third-party code 1.00
Reduce unused CSS 1.00
Reduce unused JavaScript 1.00
Time to Interactive 1.00
Avoid serving legacy JavaScript to modern browsers: Potential savings of 20 KiB 2.50
Defer offscreen images: Potential savings of 203 KiB 2.50
Image elements do not have explicit width and height: 2.50
Minify JavaScript: Potential savings of 3 KiB 2.50
Serve static assets with an efficient cache policy: 31 resources found 2.50
All text remains visible during webfont loads 5.00
Avoid chaining critical requests 5.00
Avoid large layout shifts 5.00
Avoid large layout shifts 5.00
Avoid long main-thread tasks 5.00
Avoid multiple page redirects 5.00
Avoid non-composited animations 5.00
Avoids document.write() 5.00
Avoids enormous network payloads 5.00
Diagnostics 5.00
Efficiently encode images 5.00
Enable text compression 5.00
Final Screenshot 5.00
Has a <meta name="viewport"> tag with width or initial-scale 5.00
Initial server response time was short 5.00
Metrics 5.00
Minify CSS 5.00
Network Requests 5.00
Network Round Trip Times 5.00
Preload Largest Contentful Paint image 5.00
Properly size images 5.00
Remove duplicate modules in JavaScript bundles 5.00
Resources Summary 5.00
Screenshot Thumbnails 5.00
Script Treemap Data 5.00
Serve images in next-gen formats 5.00
Server Backend Latencies 5.00
Tasks 5.00
Use HTTP/2 5.00
Use video formats for animated content 5.00
User Timing marks and measures 5.00
Uses passive listeners to improve scrolling performance 5.00
Enable text compression 5.00

Lighthouse SEO

5.00

The website is really good at SEO!
Document avoids plugins 5.00
Document has a <title> element 5.00
Document has a meta description 5.00
Document has a valid hreflang 5.00
Document has a valid rel=canonical 5.00
Document uses legible font sizes 5.00
Has a <meta name="viewport"> tag with width or initial-scale 5.00
Image elements have [alt] attributes 5.00
Links are crawlable 5.00
Links have descriptive text 5.00
Page has successful HTTP status code 5.00
Page isn’t blocked from indexing 5.00
Tap targets are sized appropriately 5.00
robots.txt is valid 5.00

Lighthouse Best Practices

2.60

The website is pretty bad on what is considered good practice, according to Google Lighthouse.
Uses deprecated APIs 1.00
Uses third-party cookies 1.00
Browser errors were logged to the console 1.00
Issues were logged in the Issues panel in Chrome Devtools 1.00
Registers an unload listener 1.00
Uses HTTPS 5.00
Allows users to paste into input fields 5.00
Avoids requesting the geolocation permission on page load 5.00
Avoids requesting the notification permission on page load 5.00
Displays images with correct aspect ratio 5.00
Page has the HTML doctype 5.00
Properly defines charset 5.00
Serves images with appropriate resolution 5.00
Detected JavaScript libraries 5.00
Ensure CSP is effective against XSS attacks 5.00
Page has valid source maps 5.00
Uses HTTPS 5.00
Issues were logged in the Issues panel in Chrome Devtools 1.00
Allows users to paste into input fields 5.00
Uses deprecated APIs 1.00
Page has the HTML doctype 5.00

W3C HTML

1.90

The tested page has 235 errors in its HTML code. It is not that good.
Number of grouped error type: 11 2.80
Number of errors: 235 1.00
Bad value X for attribute X on element X: An ID must not contain whitespace. (errors of this type: 172 pcs)
Attribute X not allowed on element X at this point. (errors of this type: 29 pcs)
Bad value X for attribute X on element X: Expected a digit but saw X instead. (errors of this type: 10 pcs)
Element X not allowed as child of element X in this context. (Suppressing further errors from this subtree.) (errors of this type: 8 pcs)
An X element with a X attribute whose value is X must not have an X attribute whose value is X or X. (errors of this type: 5 pcs)
CSS: X: X is not a X value. (errors of this type: 3 pcs)
The element X must not appear as a descendant of the X element. (errors of this type: 3 pcs)
The value of the X attribute of the X element must be the ID of a non-hidden form control. (errors of this type: 2 pcs)
Bad value X for attribute X on element X. (errors of this type: 1 pcs)
A X element with a X attribute must not have a X attribute with the value X. (errors of this type: 1 pcs)
Element X is missing required attribute X. (errors of this type: 1 pcs)

Standard Files

2.88

robots.txt seems ok. 5.00
Sitemap is not specified in robots.txt 1.00
RSS subscription is missing in the HTMLs metadata. 4.50
security.txt is missing. 1.00

Lighthouse A11y

4.90

The website can be more accessible, but is rather good!
Buttons have an accessible name 5.00
Image elements have [alt] attributes 5.00
[aria-*] attributes are valid and not misspelled 5.00
[aria-*] attributes have valid values 5.00
[aria-*] attributes match their roles 5.00
[aria-hidden="true"] is not present on the document <body> 5.00
[user-scalable="no"] is not used in the <meta name="viewport"> element and the [maximum-scale] attribute is not less than 5. 5.00
Background and foreground colors have a sufficient contrast ratio 5.00
Document has a <title> element 5.00
Form elements have associated labels 5.00
Heading elements are not in a sequentially-descending order 1.00
Links are distinguishable without relying on color. 5.00
Links have a discernible name 5.00
List items (<li>) are contained within <ul>, <ol> or <menu> parent elements 5.00
Lists contain only <li> elements and script supporting elements (<script> and <template>). 5.00
No element has a [tabindex] value greater than 0 5.00
<html> element has a [lang] attribute 5.00
<html> element has a valid value for its [lang] attribute 5.00
[aria-hidden="true"] elements do not contain focusable descendents 5.00
[id] attributes on active, focusable elements are unique 5.00
Elements with visible text labels do not have matching accessible names. 1.00
Image elements do not have [alt] attributes that are redundant text. 5.00
Values assigned to role="" are valid ARIA roles. 5.00

Sitespeed.io

2.05

The website is quite slow. 2.05
Speedindex: 3450 2.05
Loading time: 3.62s
Number of requests: 176

Integrity & Security

2.44

Rather poor on user privacy.
Result generated: 2024-04-05 08:34:50 Etc/UTC (Cached for 24 hours)
HTTPS by default: is good! 5.00
HTTP Strict Transport Security HSTS: is pretty bad. 1.00
Content Security Policy: is pretty bad. 1.00
Reporting CSP Certificate Transparency Network Error Logging: is good! 5.00
Referrer Policy: is pretty bad. 1.00
Subresource Integrity SRI: is pretty bad. 1.00
HTTP headers: is ok, with 1 error(s) and 0 warning(s). 4.50
Cookies: is ok, with 78 error(s) and 0 warning(s). 1.00

HTTP & Tech

3.89

Score is divided by 2 (number of urls tested with redirects)
HTTP to HTTPS redirect 5.00
TLSv1.3 support 5.00
TLSv1.2 support 5.00
No IPv6 support 1.00
IPv4 support 5.00
No HTTPv3 support 1.00
No QUIC support 1.00
HTTP to HTTPS redirect 5.00
TLSv1.3 support 5.00
TLSv1.2 support 5.00
IPv6 support 5.00
IPv4 support 5.00
No HTTPv3 support 1.00
No QUIC support 1.00

Carbon Calculator

2.15

The webpage generates some more carbon dioxide than is preferable :/
Carbon dioxide per pageview: 1.43 gram(s)
More green than 43 % of the websites tested by webperf.se (Reference updated: 2022-12-16).
More green than 44 % of the websites tested by webperf.se (Reference updated: 2021-12-12).
Network transfer size: 2 mb 2.15