Performance

· 26 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.

1.20 s

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

3.03 s

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

56 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.

1.20 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.

3.03 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

20 PASS 2 REVIEW 1 FIX

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private, no-cache, no-store, max-age=0, must-revalidate

No ETag or Last-Modified header

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

Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

JS Execution Cost

Action

1211ms total JS execution

REVIEW

1211ms total JS execution

https://www.tsevilangel.com/_next/static/chunks/25...: 454ms CPU time

https://www.tsevilangel.com/: 420ms CPU time

Unattributable: 263ms CPU time

https://www.tsevilangel.com/_next/static/chunks/4b...: 74ms CPU time

Main Thread Breakdown

Script Evaluation 42% Other 30% Style & Layout 12% Script Parsing & Compilation 8% Rendering 4% Parse HTML & CSS 3%

Script	Total	Scripting	Parse/Compile	Party
https://www.tsevilangel.com/_next/static/chunks/255-09eddc9d5ad190e7.js	454ms	427ms	11ms	1st
https://www.tsevilangel.com/	420ms	21ms	37ms	1st
Unattributable	263ms	32ms	0ms	1st
https://www.tsevilangel.com/_next/static/chunks/4bd1b696-21f374d1156f834a.js	74ms	29ms	12ms	1st

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.

A+

Page Weight Budget

439 KB transferred, 46 requests

PASS

439 KB transferred, 46 requests

Page weighs 1.1 MB (439 KB transferred)

46 HTTP requests

Estimated 0.09 g CO2 per page load

439 KB transferred

46 requests

0.09 g CO2 per page load

JavaScript 195.7 KiB 45%

Images 140.1 KiB 32%

Fonts 47.9 KiB 11%

HTML 43.4 KiB 10%

Other 10.0 KiB 2%

Other 1.9 KiB 0%

0 2.4 MB 4.9 MB

Under budget

Third-Party Impact

31% third-party, 0 ms blocking

PASS

31% third-party, 0 ms blocking

Third-party code accounts for 31% of page weight (138.0 KiB of 438.9 KiB)

Third-party blocking time is low (0 ms)

69%

31%

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+

Image Optimization

10 images, 0 KB saveable

PASS

10 images, 0 KB saveable

All images are well-optimized

10 images 140 KB

0 oversized -0 KB

1 legacy format

0 missing dimensions CLS risk

A+

Font Loading

1 fonts (48 KB)

PASS

1 fonts (48 KB)

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

Web fonts

48 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

e4af272ccee01ff0-s.p.woff2 woff2 swap

Size 48 KB

Load time 96 ms

Start 195 ms

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+

JS Bundles

20 scripts, 0 KB unused

PASS

20 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.tsevilangel.com/_next/static/chunks/webpack-ffc0ad86c26e5b11.js	2 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/4bd1b696-21f374d1156f834a.js	55 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/255-09eddc9d5ad190e7.js	45 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/main-app-5b9be70a80a88730.js	1 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/20-0082a47cf797de37.js	18 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/app/global-error-1ef3bed3af3f79c4.js	8 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/252-a3be2262a0215496.js	7 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/223-542a2d4d4cd3c957.js	4 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/app/%5Blocale%5D/layout-237fd9949cedf6c4.js	6 KB	—	✓	1st
https://www.tsevilangel.com/_next/static/chunks/app/%5Blocale%5D/error-e68de337b572b009.js	4 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

Resource Hints

5 hints, 0 missing preconnects

PASS

5 hints, 0 missing preconnects

1 dns-prefetch redundant with preconnect on same origin

preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://transform.gammacdn.com. Remove the redundant dns-prefetch entries.

1 URL(s) appear in multiple hints

The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://transform.gammacdn.com (dns-prefetch+preconnect).

Page uses 5 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

prefetch

—

5 resource hints configured

preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://transform.gammacdn.com. Remove the redundant dns-prefetch entries.

Why this matters

Performance issues directly impact user engagement and conversion rates.

The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://transform.gammacdn.com (dns-prefetch+preconnect).

Why this matters

Performance issues directly impact user engagement and conversion rates.

A+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

HTTP/3 (QUIC) is supported

First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.

A+

Document Compression

Document response uses brotli

PASS

Document 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 uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: private, no-cache, no-store, max-age=0, must-revalidate

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch

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

46 resources · 439 KB · 0 KB savings available

PASS

46 resources · 439 KB · 0 KB savings available

Within 1MB page-weight target

Got: 439 KB

9 third-party resources (31% of weight)

46 resources · 438.9 KiB · 9 third-party Within 1MB page-weight target

JavaScript 45% · 195.7 KiB

Image 32% · 141.5 KiB

Font 11% · 47.9 KiB

Document 10% · 43.4 KiB

Other 2% · 10.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

46 resources			438.9 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.

CSS Performance Depth

1 CSS depth issue(s) detected

PASS

1 CSS depth issue(s) detected

1 `@font-face` rule(s) without `font-display` -- causes FOIT

An `@font-face` rule without `font-display` causes Flash of Invisible Text (FOIT): the browser hides the styled text for up to 3 seconds while the custom font downloads, then either swaps to fallback (Chrome / Firefox) or stays invisible (older Safari). Add `font-display: swap` (shows fallback immediately, swaps in the custom font when ready) or `font-display: optional` (uses fallback if the font isn't ready in 100ms; never causes visible swap). Either eliminates FOIT outright.

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

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

46 requests over 1643ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

27 images, 7 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

7 KB

Oversized

3 missing lazy loading

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