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

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.

1.31 s

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

2.43 s

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

84 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.

1.71 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.

2.43 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 3 REVIEW

JS Execution Cost

Action

1127ms total JS execution

REVIEW

1127ms total JS execution

https://tibzi.com/: 529ms CPU time

https://tibzi.com/assets/index-DAr8l0XQ.js: 316ms CPU time

Unattributable: 281ms CPU time

Main Thread Breakdown

Other 39% Script Evaluation 27% Style & Layout 22% Rendering 9%

Script	Total	Scripting	Parse/Compile	Party
https://tibzi.com/	529ms	49ms	2ms	1st
https://tibzi.com/assets/index-DAr8l0XQ.js	316ms	254ms	1ms	1st
Unattributable	281ms	18ms	0ms	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.

HTTP Caching

public, max-age=0

REVIEW

public, max-age=0

Cache-Control header is set

Got: public, max-age=0

ETag present — enables conditional (304) responses

Last-Modified header present

Cache-Control

public, max-age=0

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	0	Cache for 0 seconds

A+

Page Weight Budget

340 KB transferred, 48 requests

PASS

340 KB transferred, 48 requests

Page weighs 771 KB (340 KB transferred)

48 HTTP requests

Estimated 0.07 g CO2 per page load

340 KB transferred

48 requests

0.07 g CO2 per page load

Fonts 161.3 KiB 47%

JavaScript 155.8 KiB 46%

HTML 14.0 KiB 4%

Other 7.5 KiB 2%

Other 486 B 0%

Other 400 B 0%

Images 317 B 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

No third-party resources detected

No third-party resources detected — all resources are first-party.

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://tibzi.com/img/logo-transparent.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

1 images 0 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+

Font Loading

3 fonts (161 KB)

PASS

3 fonts (161 KB)

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

Web fonts

161 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

inter-latin.woff2 woff2 swap

Size 47 KB

Load time 116 ms

Start 235 ms

Risk FOUT — text flashes from fallback to web font

inter-latin-ext.woff2 woff2 swap

Size 83 KB

Load time 114 ms

Start 473 ms

Risk FOUT — text flashes from fallback to web font

jetbrains-mono-latin.woff2 woff2 swap

Size 31 KB

Load time 55 ms

Start 706 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

39 scripts, 0 KB unused

PASS

39 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://tibzi.com/assets/index-DAr8l0XQ.js	66 KB	—	✓	1st
https://tibzi.com/assets/Home-ClYvvYJo.js	9 KB	—	✓	1st
https://tibzi.com/assets/useAudit-BMdOvArL.js	3 KB	—	✓	1st
https://tibzi.com/assets/turnstile-DvUZs_rY.js	2 KB	—	✓	1st
https://tibzi.com/assets/target-BpKv7Yel.js	0 KB	—	✓	1st
https://tibzi.com/assets/circle-alert-C7iUuAw7.js	0 KB	—	✓	1st
https://tibzi.com/assets/loader-circle-BU3RnvoK.js	0 KB	—	✓	1st
https://tibzi.com/assets/api-BGgtK02Q.js	1 KB	—	✓	1st
https://tibzi.com/assets/categories-NkdRZYy3.js	2 KB	—	✓	1st
https://tibzi.com/assets/globe-CFXlyy_v.js	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

1 hints, 0 missing preconnects

PASS

1 hints, 0 missing preconnects

Page uses 1 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

—

prefetch

—

1 resource hints configured

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 max-age=0 (≤ 5min) is appropriate

PASS

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

Got: public, max-age=0

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: Accept-Encoding

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).

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).

A+

Page Weight Inventory

48 resources · 340 KB · 0 KB savings available

PASS

48 resources · 340 KB · 0 KB savings available

Within 1MB page-weight target

Got: 340 KB

48 resources · 339.8 KiB · 0 third-party Within 1MB page-weight target

Font 47% · 161.3 KiB

JavaScript 46% · 155.8 KiB

Document 4% · 14.0 KiB

Other 2% · 8.0 KiB

Image 0% · 717 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

48 resources			339.8 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

A+

JavaScript Blocking

No render-blocking JS or document.write usage detected

PASS

No render-blocking JS or document.write usage detected

No JavaScript blocking issues detected

A+

CSS Performance Depth

No CSS performance depth issues detected

PASS

No CSS performance depth issues detected

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

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

48 requests over 764ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

2 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

2 missing dimensions 1 missing lazy loading

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