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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
91
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.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

827 ms

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

1.78 s

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

0 ms

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

0.004

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

1.16 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.

1.79 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
7 PASS 3 REVIEW 3 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 (1.5 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
55 resources · 1.5 MB · 86 KB savings available
FIX
55 resources · 1.5 MB · 86 KB savings available
Warning::
Page weight 509 KB over 1MB target
Got: 1.5 MB Expected: ≤ 1 MB
Info::
~86 KB of savings available
Warning::
54 third-party resources (100% of weight)
Info::
1 resources over 200KB
55 resources · 1.5 MiB · 54 third-party 508.5 KiB over 1MB target
Font 44% · 667.1 KiB
Image 21% · 315.4 KiB
JavaScript 20% · 300.9 KiB
CSS 14% · 221.0 KiB
Document 1% · 21.5 KiB
Other 0% · 6.7 KiB

~86.3 KiB of savings available

Remove unused JavaScript: 86.3 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.

B
Page Weight Budget
1.5 MB transferred, 55 requests
REVIEW
1.5 MB transferred, 55 requests
Info::
Page weighs 4.3 MB (1.5 MB transferred)
Info::
Fonts are 667 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 667 KB
Info::
CSS is 221 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 221 KB
Info::
55 HTTP requests
Info::
Estimated 0.31 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
55 requests
0.31 g CO2 per page load
Fonts 667.1 KiB 44%
Images 310.7 KiB 20%
JavaScript 300.9 KiB 20%
CSS 221.0 KiB 14%
HTML 19.7 KiB 1%
Other 6.4 KiB 0%
Other 4.3 KiB 0%
Other 2.4 KiB 0%
Other 54 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

B
JS Bundles
10 scripts, 86 KB unused
REVIEW
10 scripts, 86 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TBM...: 62 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bosch.com/media/tech/scripts/main.js?v...: 25 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 86 KB
86 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-TBM8RNC142 KB62 KB (43%)✓3rd
https://www.bosch.com/media/tech/scripts/main.js?ver=177252981762348 KB25 KB (54%)✓3rd
https://dock.ui.bosch.tech/releases/4-latest/build/dock-privacy-settings.esm.js3 KB—✓3rd
https://www.bosch.com/media/tech/scripts/react.js?ver=177252981762342 KB—✓3rd
https://www.bosch.com/media/tech/scripts/vendors.js?ver=177252981762326 KB—✓3rd
https://dock.ui.bosch.tech/releases/4-latest/build/p-88b2d8c0.js7 KB—✓3rd
https://sst.bosch.com/echo.js5 KB—✓3rd
https://dock.ui.bosch.tech/releases/4-latest/build/p-f0149d54.entry.js28 KB—✓3rd
https://dock.ui.bosch.tech/releases/4-latest/build/p-d2842e67.js1 KB—✓3rd
https://dock.ui.bosch.tech/releases/4-latest/build/p-f4de5ca1.js1 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

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
23 images, 0 KB saveable
PASS
23 images, 0 KB saveable
Info::
All images are well-optimized
23 images 311 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
327ms total JS execution
PASS
327ms total JS execution
Info::
https://www.bosch.com/: 135ms CPU time
Info::
Unattributable: 82ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-TBM...: 59ms CPU time
Info::
https://www.bosch.com/media/tech/scripts/main.js?v...: 52ms CPU time
Warning::
Third-party scripts: 327ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 30% Style & Layout 21% Rendering 4% Script Parsing & Compilation 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.bosch.com/135ms5ms1ms3rd
Unattributable82ms5ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TBM8RNC59ms48ms8ms3rd
https://www.bosch.com/media/tech/scripts/main.js?ver=177252981762352ms36ms4ms3rd
A+
Font Loading
5 fonts (667 KB)
PASS
5 fonts (667 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

667 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 827 ms LCP 1.8 shttps://www.bosch.com/media/tech/fonts/woff2/boschsans_regular.woff2boschsans_regular.woff2 https://www.bosch.com/media/tech/fonts/woff2/boschsans_regular.woff2 — 75.8 KiB — 37 ms — font-display: swaphttps://www.bosch.com/media/tech/fonts/woff2/bosch_icon_woff2.woff2bosch_icon_woff2.woff2 https://www.bosch.com/media/tech/fonts/woff2/bosch_icon_woff2.woff2 — 432.5 KiB — 56 ms — font-display: swaphttps://www.bosch.com/media/tech/fonts/woff2/boschsans_bold.woff2boschsans_bold.woff2 https://www.bosch.com/media/tech/fonts/woff2/boschsans_bold.woff2 — 76.3 KiB — 37 ms — font-display: swaphttps://www.bosch.com/media/tech/fonts/woff2/bosch_ui_icon_woff2.woff2bosch_ui_icon_woff2.woff2 https://www.bosch.com/media/tech/fonts/woff2/bosch_ui_icon_woff2.woff2 — 4.6 KiB — 28 ms — font-display: swaphttps://www.bosch.com/media/tech/fonts/woff2/boschsans-regularitalic.woff2boschsans-regularitalic... https://www.bosch.com/media/tech/fonts/woff2/boschsans-regularitalic.woff2 — 77.9 KiB — 22 ms — font-display: swap
boschsans_regular.woff2 woff2 swap
Size 76 KB
Load time 37 ms
Start 672 ms
Risk FOUT — text flashes from fallback to web font
bosch_icon_woff2.woff2 woff2 swap
Size 433 KB
Load time 56 ms
Start 673 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
boschsans_bold.woff2 woff2 swap
Size 76 KB
Load time 37 ms
Start 673 ms
Risk FOUT — text flashes from fallback to web font
bosch_ui_icon_woff2.woff2 woff2 swap
Size 5 KB
Load time 28 ms
Start 677 ms
Risk FOUT — text flashes from fallback to web font
boschsans-regularitalic... woff2 swap
Size 78 KB
Load time 22 ms
Start 878 ms
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)

Fixing the unchecked items could save ~216 KB and ~432 ms

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
55 requests over 1195ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 827 ms LCP 1.8 shttps://bosch.com// https://bosch.com/ — 301 — 1.8 KiB — 156 ms — h2https://www.bosch.com/www.bosch.com/ https://www.bosch.com/ — 200 — 19.7 KiB — 212 ms — h2https://assets.bosch.com/media/global/bosch_group/annual_report/keyvisuals_topics/for-tomorrow-today_res_992x558.webpassets.bosch.com/media/global/bosch... https://assets.bosch.com/media/global/bosch_group/annual_report/keyvisuals_topics/for-tomorrow-today_res_992x558.webp — 200 — 48.9 KiB — 475 ms — h2https://www.bosch.com/media/tech/styles/frok/light-mode-all-backgrounds.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/light-mode-all-backgrounds.css?ver=1772529817623 — 200 — 10.0 KiB — 39 ms — h2https://www.bosch.com/media/tech/styles/frok/light-mode-gradations.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/light-mode-gradations.css?ver=1772529817623 — 200 — 2.8 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-foundations.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-foundations.css?ver=1772529817623 — 200 — 3.9 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-fonts.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-fonts.css?ver=1772529817623 — 200 — 2.8 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-icons.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-icons.css?ver=1772529817623 — 200 — 57.2 KiB — 59 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-atoms.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-atoms.css?ver=1772529817623 — 200 — 16.3 KiB — 44 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-molecules.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-molecules.css?ver=1772529817623 — 200 — 7.4 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-organisms.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-organisms.css?ver=1772529817623 — 200 — 8.7 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/main.css?ver=1772529817623www.bosch.com/media/tech/styles/mai... https://www.bosch.com/media/tech/styles/main.css?ver=1772529817623 — 200 — 37.4 KiB — 63 ms — h2https://btm.bosch.com/rb/chat/cognigy/v3_latest/webchat.cssbtm.bosch.com/rb/chat/cognigy/v3_la... https://btm.bosch.com/rb/chat/cognigy/v3_latest/webchat.css — 200 — 74.4 KiB — 234 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TBM8RNCwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TBM8RNC — 200 — 142.0 KiB — 197 ms — h2https://dock.ui.bosch.tech/releases/4-latest/build/dock-privacy-settings.esm.jsdock.ui.bosch.tech/releases/4-lates... https://dock.ui.bosch.tech/releases/4-latest/build/dock-privacy-settings.esm.js — 200 — 2.6 KiB — 143 ms — h2https://www.bosch.com/media/tech/scripts/react.js?ver=1772529817623www.bosch.com/media/tech/scripts/re... https://www.bosch.com/media/tech/scripts/react.js?ver=1772529817623 — 200 — 42.4 KiB — 60 ms — h2https://www.bosch.com/media/tech/scripts/vendors.js?ver=1772529817623www.bosch.com/media/tech/scripts/ve... https://www.bosch.com/media/tech/scripts/vendors.js?ver=1772529817623 — 200 — 25.7 KiB — 64 ms — h2https://www.bosch.com/media/tech/scripts/main.js?ver=1772529817623www.bosch.com/media/tech/scripts/ma... https://www.bosch.com/media/tech/scripts/main.js?ver=1772529817623 — 200 — 48.1 KiB — 67 ms — h2https://www.bosch.com/media/tech/tech_images/site.webmanifestwww.bosch.com/media/tech/tech_image... https://www.bosch.com/media/tech/tech_images/site.webmanifest — 200 — 2.4 KiB — 82 ms — h2https://dock.ui.bosch.tech/releases/4-latest/build/p-88b2d8c0.jsdock.ui.bosch.tech/releases/4-lates... https://dock.ui.bosch.tech/releases/4-latest/build/p-88b2d8c0.js — 200 — 6.5 KiB — 20 ms — h2data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHhtbDpzcGFjZT0icHJlc…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHhtbDpzcGFjZT0icHJlc… — 200 — 0 B — 0 ms — datahttps://assets.bosch.com/media/global/stories/shopfloor_agent/keyvisual-agentic-ai_res_400x225.webpassets.bosch.com/media/global/stori... https://assets.bosch.com/media/global/stories/shopfloor_agent/keyvisual-agentic-ai_res_400x225.webp — 200 — 5.0 KiB — 139 ms — h2https://assets.bosch.com/media/global/products_and_solutions/at_home/home_appliances/slider-home-appliances_res_400x400.webpassets.bosch.com/media/global/produ... https://assets.bosch.com/media/global/products_and_solutions/at_home/home_appliances/slider-home-appliances_res_400x400.webp — 200 — 10.2 KiB — 139 ms — h2https://assets.bosch.com/media/global/products_and_solutions/at_home/power_tools/slider-power-tools_res_400x400.webpassets.bosch.com/media/global/produ... https://assets.bosch.com/media/global/products_and_solutions/at_home/power_tools/slider-power-tools_res_400x400.webp — 200 — 11.8 KiB — 150 ms — h2https://assets.bosch.com/media/global/products_and_solutions/at_home/garden_tools/slider-garden-tools_res_400x400.webpassets.bosch.com/media/global/produ... https://assets.bosch.com/media/global/products_and_solutions/at_home/garden_tools/slider-garden-tools_res_400x400.webp — 200 — 8.3 KiB — 152 ms — h2https://assets.bosch.com/media/global/products_and_solutions/at_home/measuring_tools/slider-measuring-tools_res_400x400.webpassets.bosch.com/media/global/produ... https://assets.bosch.com/media/global/products_and_solutions/at_home/measuring_tools/slider-measuring-tools_res_400x400.webp — 200 — 11.0 KiB — 168 ms — h2https://www.bosch.com/media/tech/fonts/woff2/boschsans_regular.woff2www.bosch.com/media/tech/fonts/woff... https://www.bosch.com/media/tech/fonts/woff2/boschsans_regular.woff2 — 200 — 75.8 KiB — 37 ms — h2https://www.bosch.com/media/tech/fonts/woff2/bosch_icon_woff2.woff2www.bosch.com/media/tech/fonts/woff... https://www.bosch.com/media/tech/fonts/woff2/bosch_icon_woff2.woff2 — 200 — 432.5 KiB — 56 ms — h2https://www.bosch.com/media/tech/fonts/woff2/boschsans_bold.woff2www.bosch.com/media/tech/fonts/woff... https://www.bosch.com/media/tech/fonts/woff2/boschsans_bold.woff2 — 200 — 76.3 KiB — 37 ms — h2https://www.bosch.com/media/tech/fonts/woff2/bosch_ui_icon_woff2.woff2www.bosch.com/media/tech/fonts/woff... https://www.bosch.com/media/tech/fonts/woff2/bosch_ui_icon_woff2.woff2 — 200 — 4.6 KiB — 28 ms — h2
0 ms 500 ms 1.0 s 1.5 s FCP 827 ms LCP 1.8 shttps://bosch.com// https://bosch.com/ — 301 — 1.8 KiB — 156 ms — h2https://www.bosch.com/www.bosch.com/ https://www.bosch.com/ — 200 — 19.7 KiB — 212 ms — h2https://assets.bosch.com/media/global/bosch_group/annual_report/keyvisuals_topics/for-tomorrow-today_res_992x558.webpassets.bosch.com/media/global/bosch... https://assets.bosch.com/media/global/bosch_group/annual_report/keyvisuals_topics/for-tomorrow-today_res_992x558.webp — 200 — 48.9 KiB — 475 ms — h2https://www.bosch.com/media/tech/styles/frok/light-mode-all-backgrounds.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/light-mode-all-backgrounds.css?ver=1772529817623 — 200 — 10.0 KiB — 39 ms — h2https://www.bosch.com/media/tech/styles/frok/light-mode-gradations.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/light-mode-gradations.css?ver=1772529817623 — 200 — 2.8 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-foundations.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-foundations.css?ver=1772529817623 — 200 — 3.9 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-fonts.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-fonts.css?ver=1772529817623 — 200 — 2.8 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-icons.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-icons.css?ver=1772529817623 — 200 — 57.2 KiB — 59 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-atoms.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-atoms.css?ver=1772529817623 — 200 — 16.3 KiB — 44 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-molecules.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-molecules.css?ver=1772529817623 — 200 — 7.4 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/frok/frontend-kit-organisms.css?ver=1772529817623www.bosch.com/media/tech/styles/fro... https://www.bosch.com/media/tech/styles/frok/frontend-kit-organisms.css?ver=1772529817623 — 200 — 8.7 KiB — 37 ms — h2https://www.bosch.com/media/tech/styles/main.css?ver=1772529817623www.bosch.com/media/tech/styles/mai... https://www.bosch.com/media/tech/styles/main.css?ver=1772529817623 — 200 — 37.4 KiB — 63 ms — h2https://btm.bosch.com/rb/chat/cognigy/v3_latest/webchat.cssbtm.bosch.com/rb/chat/cognigy/v3_la... https://btm.bosch.com/rb/chat/cognigy/v3_latest/webchat.css — 200 — 74.4 KiB — 234 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-TBM8RNCwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-TBM8RNC — 200 — 142.0 KiB — 197 ms — h2https://dock.ui.bosch.tech/releases/4-latest/build/dock-privacy-settings.esm.jsdock.ui.bosch.tech/releases/4-lates... https://dock.ui.bosch.tech/releases/4-latest/build/dock-privacy-settings.esm.js — 200 — 2.6 KiB — 143 ms — h2https://www.bosch.com/media/tech/scripts/react.js?ver=1772529817623www.bosch.com/media/tech/scripts/re... https://www.bosch.com/media/tech/scripts/react.js?ver=1772529817623 — 200 — 42.4 KiB — 60 ms — h2https://www.bosch.com/media/tech/scripts/vendors.js?ver=1772529817623www.bosch.com/media/tech/scripts/ve... https://www.bosch.com/media/tech/scripts/vendors.js?ver=1772529817623 — 200 — 25.7 KiB — 64 ms — h2https://www.bosch.com/media/tech/scripts/main.js?ver=1772529817623www.bosch.com/media/tech/scripts/ma... https://www.bosch.com/media/tech/scripts/main.js?ver=1772529817623 — 200 — 48.1 KiB — 67 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 327ms · 210KB · €4/mo
www.bosch.com
Other
Optional
Execution 135ms
Transfer 20 KB
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 82ms
Transfer 0 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 59ms
Transfer 142 KB
Unused 43%
Monthly Cost €1/mo
www.bosch.com
Other
Optional
Execution 52ms
Transfer 48 KB
Unused 54%
Monthly Cost €1/mo

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

54% of www.bosch.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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