Performance

· 27 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

100

SEO

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

1.27 s

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

1.47 s

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

57 ms

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

0.015

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

5.14 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.

3.82 s

Page Load Progression

485 ms

969 ms

1.5 s

1.9 s

2.4 s

2.9 s

3.4 s

3.9 s

Checks

17 PASS 6 REVIEW

JS Execution Cost

995ms total JS execution

REVIEW

995ms total JS execution

https://nelgossip.it/: 537ms CPU time

https://www.googletagmanager.com/gtag/js?id=GT-NGK...: 276ms CPU time

Unattributable: 182ms CPU time

Third-party scripts: 276ms (28% of total)

Main Thread Breakdown

Script Evaluation 29% Style & Layout 29% Other 23% Rendering 10% Script Parsing & Compilation 5% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://nelgossip.it/	537ms	37ms	5ms	1st
https://www.googletagmanager.com/gtag/js?id=GT-NGK593CV	276ms	229ms	42ms	3rd
Unattributable	182ms	7ms	0ms	1st

JS Bundles

5 scripts, 73 KB unused

REVIEW

5 scripts, 73 KB unused

https://www.googletagmanager.com/gtag/js?id=GT-NGK...: 73 KB unused (41%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 73 KB

73 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=GT-NGK593CV	177 KB	73 KB (41%)	✓	3rd
https://nelgossip.it/wp-content/themes/nelgossip-theme/assets/editorial-analytics.js?ver=4.165.46	2 KB	—	✓	1st
https://nelgossip.it/wp-content/plugins/google-site-kit/dist/assets/js/googlesitekit-events-provider-content-events-90bacb156ab34fa090db.js	3 KB	—	✓	1st
blob:https://nelgossip.it/08d66ceb-1728-44b8-9989-3a52efc3e2c1	-0 KB	—	✓	3rd
https://nelgossip.it/wp-includes/js/wp-emoji-release.min.js?ver=7.1.4	5 KB	—	✓	1st

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.

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

A+

Page Weight Budget

547 KB transferred, 31 requests

PASS

547 KB transferred, 31 requests

Page weighs 1.1 MB (547 KB transferred)

31 HTTP requests

Estimated 0.11 g CO2 per page load

547 KB transferred

31 requests

0.11 g CO2 per page load

Images 217.1 KiB 40%

JavaScript 187.4 KiB 34%

Fonts 92.1 KiB 17%

HTML 24.5 KiB 4%

CSS 15.4 KiB 3%

Other 9.8 KiB 2%

Other 546 B 0%

0 2.4 MB 4.9 MB

Under budget

Third-Party Impact

37% third-party, 0 ms blocking

PASS

37% third-party, 0 ms blocking

Third-party code accounts for 37% of page weight (204.2 KiB of 546.8 KiB)

Third-party blocking time is low (0 ms)

63%

37%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

Image Optimization

19 images, 0 KB saveable

PASS

19 images, 0 KB saveable

All images are well-optimized

19 images 217 KB

0 oversized -0 KB

2 legacy format

0 missing dimensions CLS risk

A+

Font Loading

3 fonts (92 KB)

PASS

3 fonts (92 KB)

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

Web fonts

92 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

barlow-condensed-700.woff2 woff2 swap

Size 22 KB

Load time 216 ms

Start 3.1 s

Risk FOUT — text flashes from fallback to web font

inter-latin.woff2 woff2 swap

Size 48 KB

Load time 156 ms

Start 3.2 s

Risk FOUT — text flashes from fallback to web font

barlow-condensed-800.woff2 woff2 swap

Size 22 KB

Load time 139 ms

Start 3.2 s

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)

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

2 hints, 0 missing preconnects

PASS

2 hints, 0 missing preconnects

Page uses 2 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

prefetch

—

2 resource hints configured

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=3 (≤ 5min) is appropriate

PASS

Main HTML max-age=3 (≤ 5min) is appropriate

Got: max-age=3, must-revalidate

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: Accept-Encoding,Cookie

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

No `ETag` or `Last-Modified` -- conditional GET not supported

Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.

A+

Page Weight Inventory

31 resources · 547 KB · 73 KB savings available

PASS

31 resources · 547 KB · 73 KB savings available

Within 1MB page-weight target

Got: 547 KB

~73 KB of savings available

5 third-party resources (37% of weight)

31 resources · 546.8 KiB · 5 third-party Within 1MB page-weight target

Image 41% · 226.9 KiB

JavaScript 34% · 187.4 KiB

Font 17% · 92.1 KiB

Document 4% · 24.5 KiB

CSS 3% · 15.4 KiB

Other 0% · 546 B

~73.3 KiB of savings available

Remove unused JavaScript: 73.3 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

31 resources			546.8 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

JavaScript Blocking

1 JS blocking issue(s) detected

PASS

1 JS blocking issue(s) detected

1 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

HTTP Caching

max-age=3 (3 seconds)

PASS

max-age=3 (3 seconds)

Cache-Control header is set

Got: max-age=3, must-revalidate

Effective TTL: 3 seconds (max-age=3)

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

max-age=3, must-revalidate

Directive	Value	Meaning
max-age	3	Cache for 3 seconds
must-revalidate	—	Must recheck with server after expiry

Effective TTL: 3 seconds

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

31 requests over 4258ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

28% of JavaScript execution is third-party

First-party Third-party 276ms · 177KB · €3/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Google Tag Manager www.googletagmanager.com	Tag Manager	276ms	177 KB	41%	€3/mo	Costly

Google Tag Manager

Tag Manager

Costly

Execution 276ms

Transfer 177 KB

Unused 41%

Monthly Cost €3/mo

These scripts may cost more than they're worth

Google Tag Manager adds 276ms and costs ~€3/month

Google Tag Manager takes 276ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

Image Optimization

67 images, 53 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

53 KB

4 missing lazy loading

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