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

100

Performance

Accessibility

100

Best Practices

100

SEO

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

651 ms

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

651 ms

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.

651 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

651 ms

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

13 PASS 5 REVIEW 1 FIX

Third-Party Impact

Action

61% third-party, 0 ms blocking

FIX

61% third-party, 0 ms blocking

Third-party code accounts for 61% of page weight (188.1 KiB of 306.5 KiB)

Third-party blocking time is low (0 ms)

39%

61%

First-party Third-party

JS Bundles

9 scripts, 96 KB unused

REVIEW

9 scripts, 96 KB unused

https://www.googletagmanager.com/gtag/js?id=G-3T4N...: 69 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

https://freshnews.org/assets/turbo.min-c85b4c5406d...: 28 KB unused (86%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 96 KB

96 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=G-3T4NR37JRN	163 KB	69 KB (42%)	✓	3rd
https://freshnews.org/assets/turbo.min-c85b4c5406dd49df1f63e03a5b07120d39cc3e33bc2448f5e926b80514f9dfc8.js	32 KB	28 KB (86%)	✓	1st
https://freshnews.org/assets/application-37f365cbecf1fa2810a8303f4b6571676fa1f9c56c248528bc14ddb857531b95.js	0 KB	—	✓	1st
https://freshnews.org/assets/stimulus.min-dd364f16ec9504dfb72672295637a1c8838773b01c0b441bd41008124c407894.js	13 KB	—	✓	1st
https://freshnews.org/assets/stimulus-loading-3576ce92b149ad5d6959438c6f291e2426c86df3b874c525b30faad51b0d96b3.js	1 KB	—	✓	1st
https://freshnews.org/assets/controllers/application-368d98631bccbf2349e0d4f8269afb3fe9625118341966de054759d96ea86c7e.js	0 KB	—	✓	1st
https://freshnews.org/assets/controllers/hello_controller-549135e8e7c683a538c3d6d517339ba470fcfb79d62f738a0a089ba41851a554.js	0 KB	—	✓	1st
https://freshnews.org/assets/controllers/index-2db729dddcc5b979110e98de4b6720f83f91a123172e87281d5a58410fc43806.js	0 KB	—	✓	1st
https://cdn.jsdelivr.net/npm/sortablejs@1.15.0/Sortable.min.js	15 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

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.

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

public, max-age=0, must-revalidate

REVIEW

public, max-age=0, must-revalidate

Cache-Control header is set

Got: public, max-age=0, must-revalidate

ETag present — enables conditional (304) responses

Last-Modified header present

Cache-Control

public, max-age=0, must-revalidate

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

A+

Page Weight Budget

306 KB transferred, 17 requests

PASS

306 KB transferred, 17 requests

Page weighs 887 KB (306 KB transferred)

17 HTTP requests

Estimated 0.06 g CO2 per page load

306 KB transferred

17 requests

0.06 g CO2 per page load

JavaScript 225.8 KiB 74%

HTML 60.3 KiB 20%

CSS 10.3 KiB 3%

Images 9.3 KiB 3%

Other 547 B 0%

Other 206 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

1 images, 0 KB saveable

PASS

1 images, 0 KB saveable

https://images-na.ssl-images-amazon.com/images/I/7... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

1 images 9 KB

0 oversized -0 KB

1 legacy format

1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

A+

JS Execution Cost

141ms total JS execution

PASS

141ms total JS execution

https://freshnews.org/: 85ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-3T4N...: 57ms CPU time

Third-party scripts: 57ms (40% of total)

Main Thread Breakdown

Script Evaluation 33% Style & Layout 31% Other 22% Rendering 7% Script Parsing & Compilation 6%

Script	Total	Scripting	Parse/Compile	Party
https://freshnews.org/	85ms	6ms	0ms	1st
https://www.googletagmanager.com/gtag/js?id=G-3T4NR37JRN	57ms	47ms	10ms	3rd

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+

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+

Compression Algorithm

Main response uses brotli

PASS

Main response uses brotli

Main HTML response uses brotli (Content-Encoding: br)

Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.

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 max-age=0 (≤ 5min) is appropriate

PASS

Main HTML max-age=0 (≤ 5min) is appropriate

Got: public, max-age=0, must-revalidate

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: br` 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.

Both `ETag` and `Last-Modified` present -- efficient revalidation supported

The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).

Page Weight Inventory

17 resources · 306 KB · 96 KB savings available

PASS

17 resources · 306 KB · 96 KB savings available

Within 1MB page-weight target

Got: 306 KB

~96 KB of savings available

4 third-party resources (61% of weight)

17 resources · 306.5 KiB · 4 third-party Within 1MB page-weight target

JavaScript 74% · 225.8 KiB

Document 20% · 60.3 KiB

CSS 3% · 10.3 KiB

Image 3% · 9.5 KiB

Other 0% · 547 B

~96.2 KiB of savings available

Remove unused JavaScript: 96.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

17 resources			306.5 KiB

Network Waterfall

17 requests over 761ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

40% of JavaScript execution is third-party

First-party Third-party 57ms · 163KB · €1/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Google Tag Manager www.googletagmanager.com	Tag Manager	57ms	163 KB	42%	€1/mo	Optional

Google Tag Manager

Tag Manager

Optional

Execution 57ms

Transfer 163 KB

Unused 42%

Monthly Cost €1/mo

40% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

How third-party costs are calculated

Image Optimization

1 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

Oversized

1 missing dimensions

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