D — https://rts.ch | BeaverCheck Audit

Site Health

Score: 69 / 100

Based on 8 categories, 0 sections

Decent speed, but optimizing further could improve engagement.

Several missing protections leave your users and data exposed.

Major barriers for users with disabilities — up to 15% of your audience.

Well-optimized for search — your content is discoverable.

Good server performance with room for optimization.

Mostly compliant — a few items need attention.

Rich content metadata — your pages look great everywhere.

Heavier than average — reducing page weight saves energy and bandwidth.

How is this calculated?

The overall score is a weighted average of individual category scores. Categories with more impact on user experience and security carry more weight.

Performance 25%Security 25%Accessibility 15%SEO 10%Infrastructure 10%Compliance 8%Content 5%Sustainability 2%

Weights reflect general web best practices. Individual needs may differ.

How the composite score is calculated

How you compare

Amazon Route 53 · 975 peers

You 69

Avg 72

At average

0 50 100

Better than 9% of Amazon Route 53 sites See full Amazon Route 53 benchmark →

Apple · 1227 peers

You 69

Avg 72

At average

0 50 100

Better than 7% of Apple sites See full Apple benchmark →

Top Priorities (5)

Content-Security-Policy header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

HSTS header is missing

Security gaps expose your site and users to attacks, eroding trust.

Security › Security Headers

No Content-Security-Policy header found

Security gaps expose your site and users to attacks, eroding trust.

Security › Content Security Policy

Page weighs 8.5 MB (5.6 MB transferred)

Performance issues directly impact user engagement and conversion rates.

Performance › Page Weight Budget

3 image(s) missing alt attribute

Accessibility issues exclude users with disabilities — up to 15% of your potential audience.

Accessibility › Alt Text Quality

View fix priority matrix

Fix Priority Matrix

5 findings

Impact

Quick Wins

High impact, low effort — start here.

Strategic

High impact, requires investment.

Easy Improvements

Small gains, minimal effort.

Nothing in this quadrant — good news.

Deprioritize

Low impact, high effort — do last.

Nothing in this quadrant — good news.

← Low effort High effort →

Embed this badge

Markdown

[![BeaverCheck](https://beavercheck.com/badge?url=https%3A%2F%2Frts.ch)](https://beavercheck.com/results/feb9ef82-77f3-4ddf-9d1d-0c6e937b7b70)

HTML

<a href="https://beavercheck.com/results/feb9ef82-77f3-4ddf-9d1d-0c6e937b7b70"><img src="https://beavercheck.com/badge?url=https%3A%2F%2Frts.ch" alt="BeaverCheck Score"></a>

Image URL

https://beavercheck.com/badge?url=https%3A%2F%2Frts.ch

This badge auto-updates with your latest scan result.

What fixing these means

Your site has several issues that may be affecting user experience and business outcomes. Your LCP of 9.7s exceeds Google's 2.5s 'Good' threshold and the 1 performance issue below directly contributes to it. Accessibility issues exclude users who rely on assistive technology — an estimated 15% of your potential audience. Addressing the critical issues below would have the most immediate impact on your user trust.

3 security gaps detected — browsers may warn visitors about your site.

Your LCP is 9.7s — fixing the 1 performance critical could bring it under Google's 2.5s 'Good' threshold.

1 accessibility issue excludes users who rely on assistive technology.

Could reach Estimate based on resolving critical issues

Conversion Barriers

1 critical 4 warning

5 barrier(s) likely increasing bounce by ~22%.

Speed (2)

Page takes 9.7s to load

+12% bounce

Users abandon at ~3s — you're 7.2s over the 2.5s threshold

Fix: Optimize render-blocking resources, preload the hero image, and compress images

High main-thread blocking time

+2% bounce

Page is non-interactive for 560ms after first paint

Fix: Defer third-party scripts and split large bundles

Trust (2)

No HSTS header

+1% bounce

Returning visitors are briefly exposed to downgrade attacks on first request

Fix: Set Strict-Transport-Security: max-age=31536000; includeSubDomains

No Content-Security-Policy header

+1% bounce

Higher XSS blast radius — one compromised script can exfiltrate the checkout form

Fix: Ship a reporting-only CSP first, then enforce once violations are clean

Navigation (1)

No skip-to-content link

+1% bounce

Keyboard and screen-reader users must tab through the entire header on every page

Fix: Add a visible-on-focus <a href="#main">Skip to content</a> as the first focusable element

Preliminary CRO audit — each barrier links to the tab with detailed analysis.

Return on Investment

CHF 650 investment → CHF 6,925/month returns + CHF 250,000 risk avoided

Payback period: < 1 month First-year ROI: +12684%

Investment

CHF 650

5h · 5 findings

Monthly returns

CHF 6,925 /mo

~CHF 83,099 / year

Conversions recovered CHF 6,924
Bandwidth savings CHF 1.25

Regulatory risk avoided

CHF 250,000

if kept compliant

nDSG/FADP CHF 250,000

Payback period

0 12mo 24mo

CHF 195 — in quick wins — start here for the fastest payback

Figures combine localized regulatory fine ceilings, search/conversion value priced against local CPC, and bandwidth waste estimates. Results depend on implementation quality and audience composition. Not legal or financial advice.

Full methodology & sources

Estimated Remediation Cost

CHF650

5.0 developer hours at CHF130/hr

Based on Switzerland rates (CHF130/hr)

Quick wins

CHF195 3 fixes in ~90 minutes

Start here for the best return on investment

Cost by category

Cost by effort level

Adjust assumptions

Custom rate

CHF /hr

Rates reflect fully-loaded developer cost including overhead

How developer rates are sourced

What Inaction Is Costing You

CHF 20,835 / month at risk

~CHF 250,015 / year if left unfixed

Compliance Risk

CHF 250,000

nDSG/FADP

No privacy policy link detected
nDSG/FADP: CHF 1,000 – CHF 250,000
Trackers detected but no cookie policy found
nDSG/FADP: CHF 1,000 – CHF 250,000
Trackers detected but no privacy policy found
nDSG/FADP: CHF 1,000 – CHF 250,000

+1 more

Bandwidth Waste

CHF 1.25 /mo

17672.0 MB/mo × 0.071 CHF/GB

Optimize transfer: save ~1.8 MB per page load
Saves CHF 1.25/mo

Compliance figures represent the statutory maximum fine for the most severe triggered category, capped per regulation — not the sum of per-finding penalties. Based on published regulatory fine ranges. This is not legal advice.

Compliance methodology · SEO assumptions · Bandwidth model

Your performance is already good — improvements may show diminishing returns

Monthly visitors

Unique monthly visitors from your analytics

Conversion rate (%)

Purchases, signups, or key actions

Avg. order value

Optional — for revenue estimation

additional conversions/month

more engaged visitors from reduced bounce

potential monthly revenue

Current bounce (est.)

After fixes (est.)

Estimated bounce reduction

Fix 5 critical issues to capture this value

How this is calculated

Based on Google/Deloitte research ("Milliseconds Make Millions") showing a ~7% bounce rate increase per additional second of LCP above the 2.5s "Good" threshold.

Your site's LCP: → estimated after fixes.

These are estimates based on industry research — actual results vary

Bounce-rate model & assumptions

Your data stays in your browser — nothing is sent to our servers

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Lighthouse Scores

Industry-standard audits powered by Google Lighthouse.

Performance

Accessibility

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

6.56 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

9.73 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

560 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

6.56 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

14.95 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Most users today run browsers that natively support ES6+, async/await, optional chaining, and the rest of modern JavaScript. Transpiling to ES5 'just in case' adds 20-40% to your bundle for no benefit. Configure your build to target a modern browserslist, or ship a differential bundle pair (modern + legacy) with the module/nomodule pattern.

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	1469052.0 s	544.6 KiB
colibri-js.akamaized.net/penguin/tc_RTS_13.js	0.0 ms	36.2 KiB
static.chartbeat.com/js/chartbeat.js	7200.0 s	16.1 KiB
app.usercentrics.eu/browser-ui/latest/loader.js	3600.0 s	10.8 KiB
static.chartbeat.com/js/chartbeat_mab.js	7200.0 s	10.1 KiB
kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:347036?w=640&h=360	604800.0 s	64.3 KiB
kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:1945574?w=640&h=360	604800.0 s	34.1 KiB
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.css	1024277.0 s	30.6 KiB
app.usercentrics.eu/session/1px.png?settingsId=uMGC0cq2t	1800.0 s	817 B
www.rts.ch/hbv7/resources/fonts/rts-neue/rts-neue-var.v1.css	1365636.0 s	470 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
SuisseTourisme lance une campagne pour sensibiliser les visiteurs étrangers à n… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/ucfriu-29214095.image?w=640&h=1024	1.1 MiB	1.1 MiB
Patrouille des Glaciers: l'année des femmes. `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/nuiatw-29214923.image?w=640&h=1024	807.5 KiB	758.7 KiB
Est-ce qu'on va réussir à partir en vacances cet été face au risque de pénurie … `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/48ubop-29215046.image?w=640&h=1024	706.9 KiB	658.2 KiB
1-2.png `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/akbps9-29213187.image?w=640&h=1024	599.5 KiB	550.8 KiB
Un banc rouge contre les violences faites aux femmes a été inauguré à Carouge l… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/m37ina-29213890.image?w=640&h=1024	224.2 KiB	175.5 KiB
707301740_highres.jpg [KEYSTONE - JON SUPER] `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/q9pnlt-29217444.image?w=640&h=1024	113.4 KiB	64.7 KiB
707612881_highres_.jpg `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/1b6pyx-29214257.image?w=640&h=1024	90.2 KiB	49.0 KiB
En Ouganda, la "guerre civile" des chimpanzés nous éclaire sur l'origine de nos… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/fc85gj-29213911.image?w=640&h=1024	72.2 KiB	39.2 KiB
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/medias/2026/image/fi2vtv-29219872.image?w=960&h=540	64.6 KiB	33.6 KiB
Les Simpson `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:347036?w=640&h=360	63.9 KiB	26.4 KiB
Le conseil fédéral en séance extra-muros à Estavayer-le-Lac `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/vqhfs8-29219871.image?w=640&h=360	37.1 KiB	22.4 KiB
4 candidats pour succéder à Antonio Guterres à la tête de l'ONU `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/2vwqk-29219328.image?w=640&h=360	36.6 KiB	22.1 KiB
L'invitée de La Matinale (vidéo) - Mitra Sohrabi, avocate et présidente de l'as… `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/y4ido5-29217859.image?w=640&h=360	34.3 KiB	20.7 KiB
Régulation des banques d'importance systémique: analyse de Pierre Nebel `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/seoj2i-29219867.image?w=640&h=360	30.7 KiB	18.5 KiB
Baisser la voix `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/mndkxq-29216308.image?w=640&h=360	27.3 KiB	16.5 KiB
L'invité de La Matinale (vidéo) - Eric Bonvin, directeur général de l'Hôpital d… `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/a1kmkq-29218993.image?w=640&h=360	25.8 KiB	15.6 KiB
Nyon conserve son titre de fort belle manière. [KEYSTONE - JEAN-CHRISTOPHE BOTT] `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/rk42m0-29219961.image?w=320&h=240	26.4 KiB	13.9 KiB
Swiss Space Systems: le procès de Pascal Jaussi va bientôt s'ouvrir à Fribourg `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/h6dc37-29219877.image?w=640&h=360	22.5 KiB	13.6 KiB
Le parlement de la ville de Budapest. [TTstudio] `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/info/culture/2026/image/u3bnkf-29219318.image?w=640&h=360	46.5 KiB	9.0 KiB
La joie des Nyonnaises au moment de poser devant le trophée. [Keystone - Jean-C… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/4h174c-29219947.image?w=320&h=180	16.8 KiB	7.4 KiB
Les années passent, mais Julien Sprunger (no86) reste décisif pour ses couleurs… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/44b7kk-29219967.image?w=320&h=240	19.7 KiB	7.2 KiB
La joie des Nyonnaises au moment de poser devant le trophée. [Keystone - Jean-C… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/4h174c-29219947.image?w=320&h=240	19.2 KiB	6.7 KiB
La vie dans la lagune d’Ancanacubi, P.gambensis et Ploceus sp. dans le Parc nat… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2025/image/h7bz3-28942839.image?w=320&h=240	18.7 KiB	6.2 KiB

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.rts.ch/hbv7/static/css/web/frontpage-5a9750efa2f37a9f64e9540784053fab.css	12.2 KiB	151 ms
www.rts.ch/hbv7/static/css/rts-footer-dfecc29c486214dd6bbdc0d1fb212224.css	2.9 KiB
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	544.6 KiB	3.0 s
/hbv7/static/js/rts-transversal-header.min-0f4971c334f96e...	3.1 KiB
www.rts.ch/hbv7/static/js/hummingbird.min-6fe09d33e7b84266e412c71a514a2959.js	41.4 KiB	151 ms
/hbv7/static/js/rts-usercentrics.min-c880ac2ab0e033ab0f03...	6.2 KiB	151 ms
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.css	30.6 KiB	302 ms
www.rts.ch/hbv7/resources/fonts/rtsp/rtsp-v8.3-1/style.css	1.6 KiB
www.rts.ch/hbv7/resources/fonts/rts-neue/rts-neue-var.v1.css	470 B
cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js	27.4 KiB	1.1 s
cdnjs.cloudflare.com/ajax/libs/scrollup/2.4.1/jquery.scrollUp.min.js	1.4 KiB	774 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.0 s

URL	Time Spent
rts.ch/	1.0 s
www.rts.ch/	0.0 ms

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 150 ms 43.2 KiB

URL	Transfer Size	Est Savings
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.css	30.3 KiB	30.3 KiB
www.rts.ch/hbv7/static/css/rts-navigation-f08b0cf16d4c8234536f220a971295b6.css	13.9 KiB	12.9 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

This is the Lighthouse audit fired when too much JS is shipped relative to what executes. The fix isn't a config flag — it requires bundle analysis (webpack-bundle-analyzer, rollup-plugin-visualizer), splitting routes into chunks, lazy-loading off-screen components, and removing unused dependencies. Fundamentally different from minification: minifying reduces byte count, this reduces what's downloaded at all.

Source: Google web.dev / Lighthouse

Estimated savings: 2.1 s 548.8 KiB

URL	Transfer Size	Est Savings
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	543.2 KiB	432.1 KiB
app.usercentrics.eu/browser-ui/3.99.0/index.module.js	120.6 KiB	52.9 KiB
app.usercentrics.eu/browser-ui/3.99.0/VirtualServiceItem-e4cab338.js	48.6 KiB	32.0 KiB
www.rts.ch/hbv7/static/js/hummingbird.min-6fe09d33e7b84266e412c71a514a2959.js	41.2 KiB	31.9 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Total CPU Time	Script Evaluation	Script Parse
www.rts.ch/	797 ms	42 ms	7.3 ms
Unattributable	697 ms	102 ms	0.0 ms
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	571 ms	297 ms	263 ms
app.usercentrics.eu/browser-ui/3.99.0/index.module.js	543 ms	379 ms	2.7 ms
/hbv7/static/js/rts-usercentrics.min-c880ac2ab0e033ab0f03...	223 ms	202 ms	2.7 ms
cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js	174 ms	117 ms	11 ms
static.chartbeat.com/js/chartbeat.js	116 ms	94 ms	20 ms
colibri-js.akamaized.net/penguin/tc_RTS_13.js	107 ms	90 ms	15 ms
www.rts.ch/hbv7/resources/boreas/v3.9/boreas_b01.js	63 ms	50 ms	7.0 ms
www.rts.ch/hbv7/static/js/hummingbird.min-6fe09d33e7b84266e412c71a514a2959.js	57 ms	38 ms	18 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

Category	Time Spent
Script Evaluation	1.5 s
Other	944 ms
Style & Layout	414 ms
Script Parsing & Compilation	359 ms
Rendering	151 ms
Parse HTML & CSS	104 ms
Garbage Collection	12 ms

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
img.rts.ch/articles/2026/image/ucfriu-29214095.image?w=640&h=1024	1.1 MiB
img.rts.ch/articles/2026/image/nuiatw-29214923.image?w=640&h=1024	808.1 KiB
img.rts.ch/articles/2026/image/48ubop-29215046.image?w=640&h=1024	707.4 KiB
img.rts.ch/articles/2026/image/akbps9-29213187.image?w=640&h=1024	600.0 KiB
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	544.6 KiB
www.rts.ch/hbv7/resources/fonts/rts-neue/RTS-Neue-VF.woff2	321.0 KiB
img.rts.ch/articles/2026/image/m37ina-29213890.image?w=640&h=1024	224.5 KiB
app.usercentrics.eu/browser-ui/3.99.0/index.module.js	120.7 KiB
img.rts.ch/articles/2026/image/q9pnlt-29217444.image?w=640&h=1024	113.6 KiB
img.rts.ch/articles/2026/image/1b6pyx-29214257.image?w=640&h=1024	90.4 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●Avoid long main-thread tasks 11 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 90 ms

●Server Backend Latencies 570 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 210 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Protéger son audition, c'est préserver son cerveau `a.rts-card > div.card-caption > div.card-body > h4.card-title`
"Budapest", le labyrinthe urbanistico-littéraire de Nina Yargekov `a.rts-card > div.card-caption > div.card-body > h4.card-title`
Affaire Fischer: "On était tous sous le choc", confie Romain Loeffel `a.rts-card > div.card-caption > div.card-body > h4.card-title`
Les Gardiennes `a.rts-card > div.card-caption > div.card-body > h4.card-title`
Le Perchoir en direct `a.rts-card > div.card-caption > div.card-body > h4.card-title`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`

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.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●Input buttons have discernible text.

●Form elements have associated labels

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Document has a main landmark.

●Deprecated ARIA roles were not used

●Identical links have the same purpose.

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○`<input type="image">` elements have `[alt]` text

○Links are distinguishable without relying on color.

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

Best Practices

User Experience

Image display dimensions should match natural aspect ratio. Learn more about image aspect ratio.

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Aspect Ratio (Displayed)	Aspect Ratio (Actual)
La joie des Nyonnaises au moment de poser devant le trophée. [Keystone - Jean-C… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/4h174c-29219947.image?w=320&h=240	380 x 214 (1.78)	320 x 240 (1.33)

General

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js.map
www.rts.ch/hbv7/resources/boreas/v3.9/boreas_b01.js	www.rts.ch/hbv7/resources/boreas/v3.9/boreas_b01.js.map

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`

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

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

Lighthouse Scores

Industry-standard audits powered by Google Lighthouse. — Desktop

Performance

Accessibility

100

Best Practices

SEO

Core Web Vitals

Key metrics that affect user experience. — Desktop

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.68 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.49 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

42 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

1.92 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.86 s

Detailed Report

Audit breakdown by category with detailed findings.

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Why this matters

Shipping ES5 transpiled code to modern browsers wastes bytes — every user with an evergreen browser pays for compatibility you don't need.

Learn more ▾

Source: Google web.dev / Lighthouse

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Request	Cache TTL	Transfer Size
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	1469032.0 s	544.6 KiB
colibri-js.akamaized.net/penguin/tc_RTS_13.js	0.0 ms	36.2 KiB
static.chartbeat.com/js/chartbeat.js	7200.0 s	16.1 KiB
app.usercentrics.eu/browser-ui/latest/loader.js	3600.0 s	10.8 KiB
static.chartbeat.com/js/chartbeat_mab.js	7200.0 s	10.1 KiB
kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:347036?w=640&h=360	604800.0 s	64.3 KiB
kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:1945574?w=640&h=360	604800.0 s	34.1 KiB
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.css	1024257.0 s	30.6 KiB
app.usercentrics.eu/session/1px.png?settingsId=uMGC0cq2t	1800.0 s	817 B
www.rts.ch/hbv7/resources/fonts/rts-neue/rts-neue-var.v1.css	1365616.0 s	470 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

	URL	Resource Size	Est Savings
SuisseTourisme lance une campagne pour sensibiliser les visiteurs étrangers à n… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/ucfriu-29214095.image?w=640&h=1024	1.1 MiB	1.1 MiB
Patrouille des Glaciers: l'année des femmes. `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/nuiatw-29214923.image?w=640&h=1024	807.5 KiB	790.4 KiB
Est-ce qu'on va réussir à partir en vacances cet été face au risque de pénurie … `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/48ubop-29215046.image?w=640&h=1024	706.9 KiB	689.8 KiB
Iman-Naomi.png `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/lc5qsj-29212165.image?w=640&h=1024	657.9 KiB	640.8 KiB
1-2.png `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/akbps9-29213187.image?w=640&h=1024	599.5 KiB	582.5 KiB
Un banc rouge contre les violences faites aux femmes a été inauguré à Carouge l… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/m37ina-29213890.image?w=640&h=1024	224.2 KiB	207.2 KiB
707301740_highres.jpg [KEYSTONE - JON SUPER] `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/q9pnlt-29217444.image?w=640&h=1024	113.4 KiB	96.4 KiB
707612881_highres_.jpg `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/1b6pyx-29214257.image?w=640&h=1024	90.2 KiB	75.8 KiB
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/medias/2026/image/fi2vtv-29219872.image?w=1280&h=720	101.6 KiB	62.7 KiB
En Ouganda, la "guerre civile" des chimpanzés nous éclaire sur l'origine de nos… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/fc85gj-29213911.image?w=640&h=1024	72.2 KiB	60.6 KiB
Nyon conserve son titre de fort belle manière. [KEYSTONE - JEAN-CHRISTOPHE BOTT] `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/rk42m0-29219961.image?w=640&h=360	68.4 KiB	54.9 KiB
Les Simpson `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:347036?w=640&h=360	63.9 KiB	54.8 KiB
Trump prolonge unilatéralement le cessez-le-feu au Moyen-Orient `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/beus4m-29219325.image?w=640&h=360	48.4 KiB	42.4 KiB
"Je n'ai aucun doute qu'Instagram a contribué à tuer ma fille." `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/tqd1mi-29211947.image?w=640&h=1024	47.9 KiB	40.3 KiB
Les années passent, mais Julien Sprunger (no86) reste décisif pour ses couleurs… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/44b7kk-29219967.image?w=640&h=360	52.9 KiB	39.4 KiB
Pont de Chippis classé, l'humain plutôt que la vieille pierre `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/5rrtkz-29218658.image?w=640&h=360	45.1 KiB	39.1 KiB
La joie des Nyonnaises au moment de poser devant le trophée. [Keystone - Jean-C… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/4h174c-29219947.image?w=640&h=360	50.8 KiB	37.3 KiB
Le parlement de la ville de Budapest. [TTstudio] `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/info/culture/2026/image/u3bnkf-29219318.image?w=640&h=360	46.5 KiB	32.2 KiB
Le conseil fédéral en séance extra-muros à Estavayer-le-Lac `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/vqhfs8-29219871.image?w=640&h=360	37.1 KiB	31.2 KiB
4 candidats pour succéder à Antonio Guterres à la tête de l'ONU `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/2vwqk-29219328.image?w=640&h=360	36.6 KiB	30.8 KiB
L'invitée de La Matinale (vidéo) - Mitra Sohrabi, avocate et présidente de l'as… `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/y4ido5-29217859.image?w=640&h=360	34.3 KiB	28.8 KiB
Régulation des banques d'importance systémique: analyse de Pierre Nebel `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/seoj2i-29219867.image?w=640&h=360	30.7 KiB	25.8 KiB
Temps présent `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	kingfisher.rts.ch/res/img/cdns3/sherlock/urn:orphea-image:1945574?w=640&h=360	33.7 KiB	25.5 KiB
Baisser la voix `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/mndkxq-29216308.image?w=640&h=360	27.3 KiB	22.9 KiB
L'invité de La Matinale (vidéo) - Eric Bonvin, directeur général de l'Hôpital d… `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/a1kmkq-29218993.image?w=640&h=360	25.8 KiB	21.7 KiB
Le remboursement des taxes américaines devrait commencer ce lundi `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/gn7kfu-29217086.image?w=640&h=360	24.4 KiB	20.5 KiB
Pascal Jaussi, fondateur de la société S3 photographié en mars 2013. [Keystone … `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2018/image/wbcvmv-26001716.image?w=640&h=360	31.4 KiB	20.1 KiB
Swiss Space Systems: le procès de Pascal Jaussi va bientôt s'ouvrir à Fribourg `a.rts-card > div.card-thumbnail > div.embed-responsive > img.embed-responsive-item`	img.rts.ch/medias/2026/image/h6dc37-29219877.image?w=640&h=360	22.5 KiB	18.9 KiB
Romain Loeffel s'est exprimé sur l'affaire Fischer. [Claudio De Capitani/freshf… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/9829t-29219368.image?w=640&h=360	27.4 KiB	16.9 KiB
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/medias/2026/image/4sckbu-29216935.image?w=640&h=360	27.0 KiB	16.6 KiB
"Siffler contre le vent", un spectacle présenté dans le cadre de la 14e édition… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/info/culture/spectacles/2026/image/4ir9f-29219343.image?w=640&h=360	17.2 KiB	15.4 KiB
Paul Seixas a une nouvelle fois démontré tout son potentiel. [Keystone - Geert … `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2026/image/8g49pt-29219624.image?w=320&h=180	17.8 KiB	8.4 KiB
La vie dans la lagune d’Ancanacubi, P.gambensis et Ploceus sp. dans le Parc nat… `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`	img.rts.ch/articles/2025/image/h7bz3-28942839.image?w=320&h=180	14.9 KiB	5.5 KiB

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

title: Preconnected origins

description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.

title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size	Duration
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	544.6 KiB	574 ms
www.rts.ch/hbv7/static/js/hummingbird.min-6fe09d33e7b84266e412c71a514a2959.js	41.4 KiB
/hbv7/static/js/rts-transversal-header.min-0f4971c334f96e...	3.1 KiB
/hbv7/static/js/rts-usercentrics.min-c880ac2ab0e033ab0f03...	6.2 KiB
www.rts.ch/hbv7/resources/fonts/rts-neue/rts-neue-var.v1.css	470 B
www.rts.ch/hbv7/static/css/rts-footer-dfecc29c486214dd6bbdc0d1fb212224.css	2.9 KiB
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.css	30.6 KiB
www.rts.ch/hbv7/static/css/web/frontpage-5a9750efa2f37a9f64e9540784053fab.css	12.2 KiB
www.rts.ch/hbv7/resources/fonts/rtsp/rtsp-v8.3-1/style.css	1.6 KiB
cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js	27.4 KiB	272 ms
cdnjs.cloudflare.com/ajax/libs/scrollup/2.4.1/jquery.scrollUp.min.js	1.4 KiB	225 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 482 ms

URL	Time Spent
rts.ch/	482 ms
www.rts.ch/	0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 40 ms 43.0 KiB

URL	Transfer Size	Est Savings
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.css	30.3 KiB	30.3 KiB
www.rts.ch/hbv7/static/css/rts-navigation-f08b0cf16d4c8234536f220a971295b6.css	13.9 KiB	12.7 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Multi-megabyte JavaScript bundles delay every interactive feature on the page.

Learn more ▾

Source: Google web.dev / Lighthouse

Estimated savings: 360 ms 549.5 KiB

URL	Transfer Size	Est Savings
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	543.2 KiB	432.1 KiB
app.usercentrics.eu/browser-ui/3.99.0/index.module.js	120.6 KiB	53.5 KiB
app.usercentrics.eu/browser-ui/3.99.0/VirtualServiceItem-e4cab338.js	48.6 KiB	32.1 KiB
www.rts.ch/hbv7/static/js/hummingbird.min-6fe09d33e7b84266e412c71a514a2959.js	41.2 KiB	31.9 KiB

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Transfer Size
img.rts.ch/articles/2026/image/ucfriu-29214095.image?w=640&h=1024	1.1 MiB
img.rts.ch/articles/2026/image/nuiatw-29214923.image?w=640&h=1024	808.1 KiB
img.rts.ch/articles/2026/image/48ubop-29215046.image?w=640&h=1024	707.4 KiB
img.rts.ch/articles/2026/image/lc5qsj-29212165.image?w=640&h=1024	658.4 KiB
img.rts.ch/articles/2026/image/akbps9-29213187.image?w=640&h=1024	600.0 KiB
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	544.6 KiB
www.rts.ch/hbv7/resources/fonts/rts-neue/RTS-Neue-VF.woff2	321.0 KiB
img.rts.ch/articles/2026/image/m37ina-29213890.image?w=640&h=1024	224.5 KiB
app.usercentrics.eu/browser-ui/3.99.0/index.module.js	120.7 KiB
img.rts.ch/articles/2026/image/q9pnlt-29217444.image?w=640&h=1024	113.6 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits

●Optimize DOM size

●Font display

●Forced reflow

●LCP breakdown

●LCP request discovery

●Modern HTTP

●Optimize viewport for mobile

●Minify CSS

●Minify JavaScript

●JavaScript execution time 0.3 s

●Minimizes main-thread work 0.9 s

●Avoid long main-thread tasks 2 long tasks found

●Image elements have explicit `width` and `height`

●Page didn't prevent back/forward cache restoration

●Network Requests

●Network Round Trip Times 90 ms

●Server Backend Latencies 590 ms

●Tasks

●Diagnostics

●Metrics

●Screenshot Thumbnails

●Final Screenshot

●Script Treemap Data

●Resources Summary

●Initial server response time was short Root document took 40 ms

○INP breakdown

○User Timing marks and measures

○Avoid non-composited animations

○Avoid large layout shifts

Accessibility

Navigation

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Protéger son audition, c'est préserver son cerveau `a.rts-card > div.card-caption > div.card-body > h4.card-title`
"Budapest", le labyrinthe urbanistico-littéraire de Nina Yargekov `a.rts-card > div.card-caption > div.card-body > h4.card-title`
Affaire Fischer: "On était tous sous le choc", confie Romain Loeffel `a.rts-card > div.card-caption > div.card-body > h4.card-title`
Les Gardiennes `a.rts-card > div.card-caption > div.card-body > h4.card-title`
Le Perchoir en direct `a.rts-card > div.card-caption > div.card-body > h4.card-title`

These are opportunities to improve keyboard navigation in your application.

Names and labels

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`

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.

○Interactive controls are keyboard focusable

○Interactive elements indicate their purpose and state

○The page has a logical tab order

○Visual order on the page follows DOM order

○User focus is not accidentally trapped in a region

○The user's focus is directed to new content added to the page

○HTML5 landmark elements are used to improve navigation

○Offscreen content is hidden from assistive technology

○Custom controls have associated labels

○Custom controls have ARIA roles

●`[aria-*]` attributes match their roles

●`[aria-hidden="true"]` is not present on the document `<body>`

●`[role]`s have all required `[aria-*]` attributes

●`[role]` values are valid

●`[aria-*]` attributes have valid values

●`[aria-*]` attributes are valid and not misspelled

●Buttons have an accessible name

●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.

●ARIA attributes are used as specified for the element's role

●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.

●`[aria-hidden="true"]` elements do not contain focusable descendents

●Elements use only permitted ARIA attributes

●Background and foreground colors have a sufficient contrast ratio

●Document has a `<title>` element

●`<html>` element has a `[lang]` attribute

●`<html>` element has a valid value for its `[lang]` attribute

●Links are distinguishable without relying on color.

●Links have a discernible name

●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).

●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements

●No element has a `[tabindex]` value greater than 0

●Touch targets have sufficient size and spacing.

●`[lang]` attributes have a valid value

●Document has a main landmark.

●Deprecated ARIA roles were not used

○`[accesskey]` values are unique

○`button`, `link`, and `menuitem` elements have accessible names

○ARIA input fields have accessible names

○ARIA `meter` elements have accessible names

○ARIA `progressbar` elements have accessible names

○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.

○`[role]`s are contained by their required parent element

○Elements with the `role=text` attribute do not have focusable descendents.

○ARIA toggle fields have accessible names

○ARIA `tooltip` elements have accessible names

○ARIA `treeitem` elements have accessible names

○The page contains a heading, skip link, or landmark region

○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.

○Definition list items are wrapped in `<dl>` elements

○ARIA IDs are unique

○No form fields have multiple labels

○`<frame>` or `<iframe>` elements have a title

○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.

○Input buttons have discernible text.

○`<input type="image">` elements have `[alt]` text

○Form elements have associated labels

○The document does not use `<meta http-equiv="refresh">`

○`<object>` elements have alternate text

○Select elements have associated label elements.

○Skip links are focusable.

○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.

○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.

○`<video>` elements contain a `<track>` element with `[kind="captions"]`

○Tables have different content in the summary attribute and `<caption>`.

○All heading elements contain content.

○Uses ARIA roles only on compatible elements

○Image elements do not have `[alt]` attributes that are redundant text.

○Identical links have the same purpose.

○Elements with visible text labels have matching accessible names.

○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.

○`<td>` elements in a large `<table>` have one or more table headers.

100

Best Practices

General

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL	Map URL
www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js	www.rts.ch/hbv7/resources/letterbox/v/3.37/letterbox.js.map
www.rts.ch/hbv7/resources/boreas/v3.9/boreas_b01.js	www.rts.ch/hbv7/resources/boreas/v3.9/boreas_b01.js.map

●Uses HTTPS

●Avoids deprecated APIs

●Avoids third-party cookies

●Allows users to paste into input fields

●Avoids requesting the geolocation permission on page load

●Avoids requesting the notification permission on page load

●Displays images with correct aspect ratio

●Serves images with appropriate resolution

●Page has the HTML doctype

●Properly defines charset

●No browser errors logged to the console

●No issues in the `Issues` panel in Chrome Devtools

●Ensure CSP is effective against XSS attacks

●Use a strong HSTS policy

●Ensure proper origin isolation with COOP

●Mitigate clickjacking with XFO or CSP

●Mitigate DOM-based XSS with Trusted Types

●Detected JavaScript libraries

○Redirects HTTP traffic to HTTPS

SEO

Content Best Practices

Informative elements should aim for short, descriptive alternate text. Decorative elements can be ignored with an empty alt attribute. Learn more about the `alt` attribute.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`
div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item `div.card-thumbnail > div.embed-responsive > picture > img.embed-responsive-item`

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

○Structured data is valid

●Page isn’t blocked from indexing

●Document has a `<title>` element

●Document has a meta description

●Page has successful HTTP status code

●Links have descriptive text

●Links are crawlable

●robots.txt is valid

●Document has a valid `hreflang`

●Document has a valid `rel=canonical`

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Site Health

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Top Priorities (5)

Fix Priority Matrix

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Strategic

Easy Improvements

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What fixing these means

Conversion Barriers

Speed (2)

Trust (2)

Navigation (1)

Return on Investment

Investment

Monthly returns

Regulatory risk avoided

Payback period

Estimated Remediation Cost

Cost by category

Cost by effort level

What Inaction Is Costing You

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Lighthouse Scores

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Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Names and labels

Best Practices

User Experience

General

SEO

Content Best Practices

Lighthouse Scores

Core Web Vitals

Detailed Report

Performance

Insights

Diagnostics

Accessibility

Navigation

Names and labels

Best Practices

General

SEO

Content Best Practices

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