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.

1.26 s

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

1.42 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.

0.000

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

7.06 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.

1.42 s

Page Load Progression

2.4 s

4.8 s

7.2 s

9.6 s

12.0 s

14.4 s

16.8 s

19.2 s

Checks

12 PASS 7 REVIEW

Page Weight Budget

1.2 MB transferred, 36 requests

REVIEW

1.2 MB transferred, 36 requests

Page weighs 1.3 MB (1.2 MB transferred)

Images are 1.1 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 1.1 MB

36 HTTP requests

Estimated 0.24 g CO2 per page load

1.2 MB transferred

36 requests

0.24 g CO2 per page load

Images 1.1 MiB 97%

CSS 18.6 KiB 2%

HTML 10.6 KiB 1%

JavaScript 3.4 KiB 0%

Other 307 B 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Under budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Image Optimization

29 images, 0 KB saveable

REVIEW

29 images, 0 KB saveable

All images are well-optimized

29 images 1.1 MB

0 oversized -0 KB

29 legacy format

0 missing dimensions CLS risk

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

HTTP/3 (QUIC) is not advertised

HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.

Document Compression

Document response uses gzip; brotli would be ~20% smaller

REVIEW

Document response uses gzip; brotli would be ~20% smaller

Main HTML response uses gzip (brotli would be ~20% smaller)

All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.

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.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

HTTP Caching

no-cache

REVIEW

no-cache

Cache-Control header is set

Got: no-cache

Last-Modified header present

Cache-Control

no-cache

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first

A+

Third-Party Impact

0% third-party, 0 ms blocking

PASS

0% third-party, 0 ms blocking

Third-party code accounts for 0% of page weight (3.3 KiB of 1.2 MiB)

Third-party blocking time is low (0 ms)

100%

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

193ms total JS execution

PASS

193ms total JS execution

Unattributable: 114ms CPU time

https://roccosiffredi.net/: 78ms CPU time

Main Thread Breakdown

Other 61% Style & Layout 13% Rendering 10% Script Evaluation 6% Garbage Collection 5% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	114ms	2ms	0ms	1st
https://roccosiffredi.net/	78ms	5ms	0ms	1st

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

A+

JS Bundles

2 scripts, 0 KB unused

PASS

2 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://analytics.ahrefs.com/analytics.js	3 KB	—	✓	3rd
https://roccosiffredi.net/?wordfence_syncAttackData=1781087894.1214	0 KB	—	✓	1st

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML uses no-cache -- safe revalidate-on-request policy

PASS

Main HTML uses no-cache -- safe revalidate-on-request policy

Got: no-cache

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

Compressed response missing `Vary` header

The page is served with `Content-Encoding: gzip` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.

`Last-Modified` present -- timestamp-based conditional GET supported

Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.

Page Weight Inventory

36 resources · 1.2 MB · 0 KB savings available

PASS

36 resources · 1.2 MB · 0 KB savings available

Page weight 1.2 MB exceeds 1 MB target by 160 KB

Got: 1.2 MB Expected: ≤ 1 MB

2 third-party resources (0% of weight)

36 resources · 1.2 MiB · 2 third-party 160.0 KiB over 1MB target

Image 97% · 1.1 MiB

CSS 2% · 18.6 KiB

Document 1% · 10.6 KiB

JavaScript 0% · 3.4 KiB

Other 0% · 307 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

36 resources			1.2 MiB

Asset Compression

No text asset hosts to measure

INFO

No text asset hosts to measure

No third-party or subdomain host served enough text assets to measure

Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.

Network Waterfall

36 requests over 33104ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

33 images, 988 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

988 KB

23 missing lazy loading

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