Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

100

Best Practices

SEO

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

8.10 s

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

9.76 s

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

50 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.

8.10 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.

9.76 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

6 PASS 4 REVIEW 3 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (1.5 MiB of 1.5 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

Page Weight Inventory

Action

291 resources · 1.5 MB · 111 KB savings available

FIX

291 resources · 1.5 MB · 111 KB savings available

Page weight 537 KB over 1MB target

Got: 1.5 MB Expected: ≤ 1 MB

~111 KB of savings available

290 third-party resources (100% of weight)

291 resources · 1.5 MiB · 290 third-party 537.4 KiB over 1MB target

JavaScript 47% · 726.3 KiB

Font 23% · 365.1 KiB

Image 20% · 319.5 KiB

CSS 6% · 87.0 KiB

Document 4% · 56.5 KiB

Other 0% · 6.9 KiB

~111.2 KiB of savings available

Remove unused JavaScript: 111.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

291 resources			1.5 MiB

HTTP Caching

Action

No cache headers

FIX

No cache headers

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.

Page Weight Budget

1.5 MB transferred, 291 requests

REVIEW

1.5 MB transferred, 291 requests

Page weighs 3.1 MB (1.5 MB transferred)

JavaScript is 726 KB — consider code splitting or lazy loading

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

Got: 726 KB

Fonts are 365 KB — consider subsetting or using system fonts

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

Got: 365 KB

291 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.32 g CO2 per page load

1.5 MB transferred

291 requests

0.32 g CO2 per page load

JavaScript 726.3 KiB 47%

Fonts 365.1 KiB 23%

Images 315.1 KiB 20%

CSS 87.0 KiB 6%

HTML 55.3 KiB 4%

Other 5.7 KiB 0%

Other 3.9 KiB 0%

Other 3.0 KiB 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

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

JS Execution Cost

639ms total JS execution

REVIEW

639ms total JS execution

Unattributable: 289ms CPU time

https://www.logitech.com/_app/immutable/chunks/Cx4...: 196ms CPU time

https://www.logitech.com/es-es: 153ms CPU time

Third-party scripts: 639ms (100% of total)

Main Thread Breakdown

Other 48% Script Evaluation 35% Style & Layout 9%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	289ms	86ms	0ms	3rd
https://www.logitech.com/_app/immutable/chunks/Cx4uPY-1.js	196ms	183ms	0ms	3rd
https://www.logitech.com/es-es	153ms	14ms	8ms	3rd

JS Bundles

189 scripts, 111 KB unused

REVIEW

189 scripts, 111 KB unused

https://www.logitech.com/_app/immutable/nodes/2.BZ...: 42 KB unused (51%)