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https://roche.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
71
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

1.56 s

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

3.01 s

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

80 ms

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

0.008

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

2.77 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.

3.01 s

Page Load Progression

465 ms
930 ms
1.4 s
1.9 s
2.3 s
2.8 s
3.3 s
3.7 s
Checks
15
6 PASS 3 REVIEW 4 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
19 scripts, 545 KB unused
FIX
19 scripts, 545 KB unused
Warning::
https://www.roche.com/10e4eb51-1f1685909ba3d6830be...: 142 KB unused (94%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://component-library.roche.com/feat/monorepo/...: 125 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/9215900255c9/17f1b4dd3...: 73 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.roche.com/app-70590e5183bd961d8e7c.js: 65 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202511.1...: 64 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 545 KB
545 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.roche.com/10e4eb51-1f1685909ba3d6830be7.js151 KB142 KB (94%)✓3rd
https://component-library.roche.com/feat/monorepo/build/roche-component-library.bundle.js?version=1776884455106261 KB125 KB (48%)✓3rd
https://assets.adobedtm.com/9215900255c9/17f1b4dd3439/launch-bb453ba32d52.min.js203 KB73 KB (36%)✓3rd
https://www.roche.com/app-70590e5183bd961d8e7c.js125 KB65 KB (52%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202511.1.0/otBannerSdk.js124 KB64 KB (51%)✓3rd
https://www.roche.com/commons-b8574c5845344d7006c1.js49 KB41 KB (84%)✓3rd
https://www.roche.com/817fd6bd-2546e5484406fc42639a.js78 KB37 KB (48%)✓3rd
https://www.roche.com/3d656130-3f4d30f637abbb6ce1a8.js34 KB—✓3rd
https://www.roche.com/e43edeba-948f50f4159078e27200.js107 KB—✓3rd
https://www.roche.com/e6875463-d1a6910394a0a1bdb3fb.js4 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
67 resources · 1.8 MB · 545 KB savings available
FIX
67 resources · 1.8 MB · 545 KB savings available
Warning::
Page weight 844 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~545 KB of savings available
Warning::
66 third-party resources (100% of weight)
Info::
2 resources over 200KB
67 resources · 1.8 MiB · 66 third-party 844.4 KiB over 1MB target
JavaScript 63% · 1.2 MiB
Image 23% · 426.5 KiB
Font 6% · 113.1 KiB
Other 4% · 71.7 KiB
Document 3% · 63.8 KiB
CSS 0% · 7.3 KiB

~545.3 KiB of savings available

Remove unused JavaScript: 545.3 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Page Weight Budget
Action
1.8 MB transferred, 67 requests
REVIEW
1.8 MB transferred, 67 requests
Info::
Page weighs 7.3 MB (1.8 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
67 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
67 requests
0.38 g CO2 per page load
JavaScript 1.2 MiB 63%
Images 424.6 KiB 23%
Fonts 113.1 KiB 6%
HTML 63.8 KiB 3%
Other 52.6 KiB 3%
Other 23.4 KiB 1%
CSS 2.7 KiB 0%
Other 1.5 KiB 0%
Other 754 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

C
JS Execution Cost
Action
1047ms total JS execution
REVIEW
1047ms total JS execution
Info::
https://www.roche.com/app-70590e5183bd961d8e7c.js: 236ms CPU time
Info::
https://assets.adobedtm.com/9215900255c9/17f1b4dd3...: 174ms CPU time
Info::
Unattributable: 158ms CPU time
Info::
https://www.roche.com/: 141ms CPU time
Info::
https://component-library.roche.com/feat/monorepo/...: 140ms CPU time
Warning::
Third-party scripts: 1047ms (100% of total)

Main Thread Breakdown

Script Evaluation 47% Script Parsing & Compilation 21% Other 16% Style & Layout 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.roche.com/app-70590e5183bd961d8e7c.js236ms199ms13ms3rd
https://assets.adobedtm.com/9215900255c9/17f1b4dd3439/launch-bb453ba32d52.min.js174ms88ms84ms3rd
Unattributable158ms37ms0ms3rd
https://www.roche.com/141ms5ms1ms3rd
https://component-library.roche.com/feat/monorepo/build/roche-component-library.bundle.js?version=1776884455106140ms33ms51ms3rd
https://cdn.cookielaw.org/scripttemplates/202511.1.0/otBannerSdk.js113ms74ms15ms3rd
https://www.roche.com/10e4eb51-1f1685909ba3d6830be7.js85ms66ms16ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
21 images, 0 KB saveable
PASS
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 425 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
Font Loading
4 fonts (113 KB)
PASS
4 fonts (113 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

113 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.6 s LCP 3.0 shttps://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Regular.woff2RocheSans-Regular.woff2 https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Regular.woff2 — 28.5 KiB — 37 ms — font-display: swaphttps://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Light.woff2RocheSans-Light.woff2 https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Light.woff2 — 27.3 KiB — 38 ms — font-display: swaphttps://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Medium.woff2RocheSans-Medium.woff2 https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Medium.woff2 — 28.9 KiB — 13 ms — font-display: swaphttps://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Bold.woff2RocheSans-Bold.woff2 https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Bold.woff2 — 28.5 KiB — 15 ms — font-display: swap
RocheSans-Regular.woff2 woff2 swap
Size 28 KB
Load time 37 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
RocheSans-Light.woff2 woff2 swap
Size 27 KB
Load time 38 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
RocheSans-Medium.woff2 woff2 swap
Size 29 KB
Load time 13 ms
Start 2.7 s
Risk FOUT — text flashes from fallback to web font
RocheSans-Bold.woff2 woff2 swap
Size 28 KB
Load time 15 ms
Start 2.7 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
67 requests over 2791ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.6 s LCP 3.0 shttps://roche.com// https://roche.com/ — 302 — 126 B — 342 ms — http/1.0https://www.roche.com/www.roche.com/ https://www.roche.com/ — 200 — 63.8 KiB — 804 ms — h2https://assets.adobedtm.com/9215900255c9/17f1b4dd3439/launch-bb453ba32d52.min.jsassets.adobedtm.com/9215900255c9/17... https://assets.adobedtm.com/9215900255c9/17f1b4dd3439/launch-bb453ba32d52.min.js — 200 — 203.1 KiB — 29 ms — h2https://component-library.roche.com/feat/monorepo/build/roche-component-library.css?version=1776884455106component-library.roche.com/feat/mo... https://component-library.roche.com/feat/monorepo/build/roche-component-library.css?version=1776884455106 — 200 — 2.7 KiB — 41 ms — h2https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Regular.woff2fonts.roche.com/fonts/roche-sans/la... https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Regular.woff2 — 200 — 28.5 KiB — 37 ms — h2https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Light.woff2fonts.roche.com/fonts/roche-sans/la... https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Light.woff2 — 200 — 27.3 KiB — 38 ms — h2https://component-library.roche.com/feat/monorepo/build/roche-component-library.bundle.js?version=1776884455106component-library.roche.com/feat/mo... https://component-library.roche.com/feat/monorepo/build/roche-component-library.bundle.js?version=1776884455106 — 200 — 261.2 KiB — 98 ms — h2https://www.roche.com/manifest.webmanifestwww.roche.com/manifest.webmanifest https://www.roche.com/manifest.webmanifest — 200 — 754 B — 340 ms — h2https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.jsassets.adobedtm.com/extensions/EP31... https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.js — 200 — 13.0 KiB — 6 ms — h2https://www.roche.com/translations/en.jsonwww.roche.com/translations/en.json https://www.roche.com/translations/en.json — 200 — 1.8 KiB — 311 ms — h2https://assets.roche.com/f/176343/1280x854/c0aeecd0b0/roche_34267.png/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/1280x854/... https://assets.roche.com/f/176343/1280x854/c0aeecd0b0/roche_34267.png/m/320x180/filters:format(webp):quality(90)/ — 200 — 10.5 KiB — 39 ms — h2https://assets.roche.com/f/176343/2592x1944/0ef73b4ea6/roche-full-year-ar2025.jpg/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/2592x1944... https://assets.roche.com/f/176343/2592x1944/0ef73b4ea6/roche-full-year-ar2025.jpg/m/320x180/filters:format(webp):quality(90)/ — 200 — 33.3 KiB — 35 ms — h2https://assets.roche.com/f/176343/1920x1281/4ffc969fc3/roche_279884.png/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/1920x1281... https://assets.roche.com/f/176343/1920x1281/4ffc969fc3/roche_279884.png/m/320x180/filters:format(webp):quality(90)/ — 200 — 9.8 KiB — 37 ms — h2https://assets.roche.com/f/176343/1080x486/8829937a18/031225_john-pasi-ha-carousel_panel-1-image.png/m/320x480/filters:format(webp):quality(90)/assets.roche.com/f/176343/1080x486/... https://assets.roche.com/f/176343/1080x486/8829937a18/031225_john-pasi-ha-carousel_panel-1-image.png/m/320x480/filters:format(webp):quality(90)/ — 200 — 7.9 KiB — 22 ms — h2https://assets.roche.com/f/176343/740x416/617c25b70f/article-teaser.jpg/m/320x240/filters:format(webp):quality(90)/assets.roche.com/f/176343/740x416/6... https://assets.roche.com/f/176343/740x416/617c25b70f/article-teaser.jpg/m/320x240/filters:format(webp):quality(90)/ — 200 — 17.4 KiB — 20 ms — h2https://assets.roche.com/f/176343/1920x1080/cc17ee3aff/wfh-sri-lanka_high-res-image.jpg/m/320x240/filters:format(webp):quality(90)/assets.roche.com/f/176343/1920x1080... https://assets.roche.com/f/176343/1920x1080/cc17ee3aff/wfh-sri-lanka_high-res-image.jpg/m/320x240/filters:format(webp):quality(90)/ — 200 — 35.4 KiB — 23 ms — h2https://assets.roche.com/f/176343/1920x1080/504154d2ce/1164695-ash-backgrounder-and-infographic-roche-website-assets-221116-v1-mf_image-001.png/m/320x240/filters:format(webp):quality(90)/assets.roche.com/f/176343/1920x1080... https://assets.roche.com/f/176343/1920x1080/504154d2ce/1164695-ash-backgrounder-and-infographic-roche-website-assets-221116-v1-mf_image-001.png/m/320x240/filters:format(webp):quality(90)/ — 200 — 17.6 KiB — 26 ms — h2https://assets.roche.com/f/176343/1920x1441/f76de8951c/roche_3461.png/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/1920x1441... https://assets.roche.com/f/176343/1920x1441/f76de8951c/roche_3461.png/m/320x180/filters:format(webp):quality(90)/ — 200 — 8.1 KiB — 29 ms — h2https://www.roche.com/webpack-runtime-c5fab4ae9f44ea96f433.jswww.roche.com/webpack-runtime-c5fab... https://www.roche.com/webpack-runtime-c5fab4ae9f44ea96f433.js — 200 — 2.4 KiB — 16 ms — h2https://www.roche.com/10e4eb51-1f1685909ba3d6830be7.jswww.roche.com/10e4eb51-1f1685909ba3... https://www.roche.com/10e4eb51-1f1685909ba3d6830be7.js — 200 — 151.3 KiB — 59 ms — h2https://www.roche.com/e43edeba-948f50f4159078e27200.jswww.roche.com/e43edeba-948f50f41590... https://www.roche.com/e43edeba-948f50f4159078e27200.js — 200 — 107.5 KiB — 60 ms — h2https://www.roche.com/817fd6bd-2546e5484406fc42639a.jswww.roche.com/817fd6bd-2546e5484406... https://www.roche.com/817fd6bd-2546e5484406fc42639a.js — 200 — 77.8 KiB — 31 ms — h2https://www.roche.com/app-70590e5183bd961d8e7c.jswww.roche.com/app-70590e5183bd961d8... https://www.roche.com/app-70590e5183bd961d8e7c.js — 200 — 125.4 KiB — 58 ms — h2data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAAdata:image/webp;base64,UklGRiIAAABX... data:image/webp;base64,UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA — 200 — 0 B — 0 ms — datahttps://www.roche.com/page-data/app-data.jsonwww.roche.com/page-data/app-data.js... https://www.roche.com/page-data/app-data.json — 200 — 262 B — 307 ms — h2https://www.roche.com/page-data/index/page-data.jsonwww.roche.com/page-data/index/page-... https://www.roche.com/page-data/index/page-data.json — 200 — 20.4 KiB — 478 ms — h2https://www.roche.com/favicon-32x32.png?v=7f5356ff0eaba89671bed4a1828ef379www.roche.com/favicon-32x32.png?v=7... https://www.roche.com/favicon-32x32.png?v=7f5356ff0eaba89671bed4a1828ef379 — 200 — 1.4 KiB — 13 ms — h2https://www.roche.com/3d656130-3f4d30f637abbb6ce1a8.jswww.roche.com/3d656130-3f4d30f637ab... https://www.roche.com/3d656130-3f4d30f637abbb6ce1a8.js — 200 — 34.2 KiB — 27 ms — h2https://www.roche.com/e6875463-d1a6910394a0a1bdb3fb.jswww.roche.com/e6875463-d1a6910394a0... https://www.roche.com/e6875463-d1a6910394a0a1bdb3fb.js — 200 — 4.5 KiB — 17 ms — h2https://www.roche.com/18d087c0-62017ac987d80f25917f.jswww.roche.com/18d087c0-62017ac987d8... https://www.roche.com/18d087c0-62017ac987d80f25917f.js — 200 — 20.2 KiB — 18 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.6 s LCP 3.0 shttps://roche.com// https://roche.com/ — 302 — 126 B — 342 ms — http/1.0https://www.roche.com/www.roche.com/ https://www.roche.com/ — 200 — 63.8 KiB — 804 ms — h2https://assets.adobedtm.com/9215900255c9/17f1b4dd3439/launch-bb453ba32d52.min.jsassets.adobedtm.com/9215900255c9/17... https://assets.adobedtm.com/9215900255c9/17f1b4dd3439/launch-bb453ba32d52.min.js — 200 — 203.1 KiB — 29 ms — h2https://component-library.roche.com/feat/monorepo/build/roche-component-library.css?version=1776884455106component-library.roche.com/feat/mo... https://component-library.roche.com/feat/monorepo/build/roche-component-library.css?version=1776884455106 — 200 — 2.7 KiB — 41 ms — h2https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Regular.woff2fonts.roche.com/fonts/roche-sans/la... https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Regular.woff2 — 200 — 28.5 KiB — 37 ms — h2https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Light.woff2fonts.roche.com/fonts/roche-sans/la... https://fonts.roche.com/fonts/roche-sans/latest/RocheSans-Light.woff2 — 200 — 27.3 KiB — 38 ms — h2https://component-library.roche.com/feat/monorepo/build/roche-component-library.bundle.js?version=1776884455106component-library.roche.com/feat/mo... https://component-library.roche.com/feat/monorepo/build/roche-component-library.bundle.js?version=1776884455106 — 200 — 261.2 KiB — 98 ms — h2https://www.roche.com/manifest.webmanifestwww.roche.com/manifest.webmanifest https://www.roche.com/manifest.webmanifest — 200 — 754 B — 340 ms — h2https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.jsassets.adobedtm.com/extensions/EP31... https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.js — 200 — 13.0 KiB — 6 ms — h2https://www.roche.com/translations/en.jsonwww.roche.com/translations/en.json https://www.roche.com/translations/en.json — 200 — 1.8 KiB — 311 ms — h2https://assets.roche.com/f/176343/1280x854/c0aeecd0b0/roche_34267.png/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/1280x854/... https://assets.roche.com/f/176343/1280x854/c0aeecd0b0/roche_34267.png/m/320x180/filters:format(webp):quality(90)/ — 200 — 10.5 KiB — 39 ms — h2https://assets.roche.com/f/176343/2592x1944/0ef73b4ea6/roche-full-year-ar2025.jpg/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/2592x1944... https://assets.roche.com/f/176343/2592x1944/0ef73b4ea6/roche-full-year-ar2025.jpg/m/320x180/filters:format(webp):quality(90)/ — 200 — 33.3 KiB — 35 ms — h2https://assets.roche.com/f/176343/1920x1281/4ffc969fc3/roche_279884.png/m/320x180/filters:format(webp):quality(90)/assets.roche.com/f/176343/1920x1281... https://assets.roche.com/f/176343/1920x1281/4ffc969fc3/roche_279884.png/m/320x180/filters:format(webp):quality(90)/ — 200 — 9.8 KiB — 37 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1047ms · 929KB · CHF3/mo
www.roche.com
Other
Costly
Execution 236ms
Transfer 125 KB
Unused 52%
Monthly Cost CHF1/mo
assets.adobedtm.com
Other
Optional
Execution 174ms
Transfer 203 KB
Unused 36%
Monthly Cost CHF0/mo
Unattributable
Other
Optional
Execution 158ms
Transfer 0 KB
Monthly Cost CHF0/mo
www.roche.com
Other
Optional
Execution 141ms
Transfer 64 KB
Monthly Cost CHF0/mo
component-library.roche.com
Other
Optional
Execution 140ms
Transfer 261 KB
Unused 48%
Monthly Cost CHF0/mo
OneTrust
Consent
Essential
Execution 113ms
Transfer 124 KB
Unused 51%
Monthly Cost CHF0/mo
www.roche.com
Other
Optional
Execution 85ms
Transfer 151 KB
Unused 94%
Monthly Cost CHF0/mo

These scripts may cost more than they're worth

  • www.roche.com adds 236ms and costs ~CHF1/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.roche.com takes 236ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

52% of www.roche.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

51% of OneTrust's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

94% of www.roche.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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