Performance

· 22 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

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.

619 ms

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

1.92 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.

0.039

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

1.01 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.

1.92 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

12 PASS 5 REVIEW 2 FIX

Page Weight Budget

Action

2.3 MB transferred, 84 requests

FIX

2.3 MB transferred, 84 requests

Page weighs 3.9 MB (2.3 MB transferred)

Fonts are 729 KB — consider subsetting or using system fonts

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

Got: 729 KB

84 HTTP requests

Estimated 0.47 g CO2 per page load

2.3 MB transferred

84 requests

0.47 g CO2 per page load

Fonts 728.6 KiB 32%

Other 615.9 KiB 27%

Images 538.7 KiB 23%

JavaScript 182.2 KiB 8%

HTML 133.9 KiB 6%

CSS 102.7 KiB 4%

Other 3.8 KiB 0%

Other 1.5 KiB 0%

Other 365 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

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.

Image Optimization

8 images, 0 KB saveable

REVIEW

8 images, 0 KB saveable

All images are well-optimized

8 images 539 KB

0 oversized -0 KB

5 legacy format

0 missing dimensions CLS risk

Main HTML Cache-Control

No Cache-Control header on main HTML response

REVIEW

No Cache-Control header on main HTML response

Main HTML response has no Cache-Control header

Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.

Server-Timing Observability

No Server-Timing header found

REVIEW

No Server-Timing header found

Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.

Page Weight Inventory

Action

84 resources · 2.3 MB · 26 KB savings available

REVIEW

84 resources · 2.3 MB · 26 KB savings available

Page weight 2.3 MB exceeds 1 MB target by 1.3 MB

Got: 2.3 MB Expected: ≤ 1 MB

18 third-party resources (34% of weight)

3 resources over 200KB

84 resources · 2.3 MiB · 18 third-party 1.3 MiB over 1MB target

Font 32% · 728.6 KiB

Other 26% · 607.8 KiB

Image 23% · 538.7 KiB

JavaScript 8% · 182.2 KiB

Document 6% · 147.7 KiB

CSS 4% · 102.7 KiB

~26.4 KiB of savings available

Remove unused JavaScript: 26.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

84 resources			2.3 MiB

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

Third-Party Impact

34% third-party, 0 ms blocking

PASS

34% third-party, 0 ms blocking

Third-party code accounts for 34% of page weight (787.7 KiB of 2.3 MiB)

Third-party blocking time is low (0 ms)

66%

34%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

JS Execution Cost

264ms total JS execution

PASS

264ms total JS execution

https://forzasrl.it/: 177ms CPU time

Unattributable: 87ms CPU time

Main Thread Breakdown

Style & Layout 30% Other 28% Script Evaluation 22% Parse HTML & CSS 10% Rendering 6% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://forzasrl.it/	177ms	2ms	2ms	1st
Unattributable	87ms	2ms	0ms	1st

A+

Font Loading

9 fonts (729 KB)

PASS

9 fonts (729 KB)

9 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

729 KB total

Render-blocking

of 9

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

roboto-kfo7cnqeu92fr1me... woff2 swap

Size 39 KB

Load time 88 ms

Start 687 ms