Performance

· 25 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

SEO

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

1.54 s

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

7.26 s

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

202 ms

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

0.003

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

4.31 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.

7.31 s

Page Load Progression

637 ms

1.3 s

1.9 s

2.5 s

3.2 s

3.8 s

4.5 s

5.1 s

Checks

15 PASS 6 REVIEW 2 FIX

Page Weight Budget

Action

4.6 MB transferred, 53 requests

FIX

4.6 MB transferred, 53 requests

Page weighs 5.1 MB (4.6 MB transferred)

Images are 1.7 MB — compress or use modern formats

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

Got: 1.7 MB

Fonts are 587 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 587 KB

53 HTTP requests

Estimated 0.96 g CO2 per page load

4.6 MB transferred

53 requests

0.96 g CO2 per page load

Other 2.2 MiB 47%

Images 1.7 MiB 37%

Fonts 586.6 KiB 12%

JavaScript 140.4 KiB 3%

HTML 17.9 KiB 0%

CSS 10.7 KiB 0%

Other 3.0 KiB 0%

Other 479 B 0%

Other 322 B 0%

0 2.4 MB 4.9 MB

Over 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

JS Execution Cost

Action

2663ms total JS execution

FIX

2663ms total JS execution

Unattributable: 1285ms CPU time

https://techex.tv/: 683ms CPU time

https://techex.tv/_next/static/chunks/271-d1fcccae...: 363ms CPU time

https://techex.tv/_next/static/chunks/f6b80d70-4d7...: 332ms CPU time

Main Thread Breakdown

Other 50% Script Evaluation 25% Style & Layout 15% Rendering 4% Script Parsing & Compilation 4%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	1285ms	47ms	0ms	1st
https://techex.tv/	683ms	14ms	11ms	1st
https://techex.tv/_next/static/chunks/271-d1fcccae7ec1cbcb.js	363ms	305ms	25ms	1st
https://techex.tv/_next/static/chunks/f6b80d70-4d7a8a31cf1c271e.js	332ms	292ms	28ms	1st

Image Optimization

Action

24 images, 0 KB saveable

REVIEW

24 images, 0 KB saveable

https://techex.tv/techex-white.svg is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://techex.tv/logos/linkedin-white.png is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

24 images 1.7 MB

0 oversized -0 KB

24 legacy format

2 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

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

Compression Algorithm

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

REVIEW

Main 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.

Page Weight Inventory

Action

53 resources · 4.6 MB · 0 KB savings available

REVIEW

53 resources · 4.6 MB · 0 KB savings available

Page weight 4.6 MB exceeds 1 MB target by 3.6 MB

Got: 4.6 MB Expected: ≤ 1 MB

8 resources over 200KB

53 resources · 4.6 MiB · 0 third-party 3.6 MiB over 1MB target

Media 47% · 2.2 MiB

Image 37% · 1.7 MiB

Font 12% · 586.6 KiB

JavaScript 3% · 140.4 KiB

Document 0% · 17.9 KiB

CSS 0% · 10.7 KiB

Other 0% · 801 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

53 resources			4.6 MiB

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

No ETag or Last-Modified header

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

Cache-Control

no-cache

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

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.

A+

Font Loading

4 fonts (587 KB)

PASS

4 fonts (587 KB)

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

Web fonts

587 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

FiraSans-Light.woff2 woff2 swap

Size 142 KB

Load time 698 ms

Start 912 ms

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

FiraSans-Regular.woff2 woff2 swap

Size 142 KB

Load time 693 ms

Start 912 ms

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

FiraSans-SemiBold.woff2 woff2 swap

Size 151 KB

Load time 696 ms

Start 913 ms

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

FiraSans-Bold.woff2 woff2 swap

Size 152 KB

Load time 708 ms

Start 913 ms

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

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)

Fixing the unchecked items could save ~293 KB and ~586 ms

A+

JS Bundles

10 scripts, 0 KB unused

PASS

10 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://techex.tv/_next/static/chunks/webpack-4104cba3bd2e8fb1.js	2 KB	—	✓	1st
https://techex.tv/_next/static/chunks/f6b80d70-4d7a8a31cf1c271e.js	53 KB	—	✓	1st
https://techex.tv/_next/static/chunks/271-d1fcccae7ec1cbcb.js	45 KB	—	✓	1st
https://techex.tv/_next/static/chunks/main-app-2070c88d587bf534.js	1 KB	—	✓	1st
https://techex.tv/_next/static/chunks/665-31c6303c68f4eb6a.js	4 KB	—	✓	1st
https://techex.tv/_next/static/chunks/app/layout-4d48cd0f503703b2.js	10 KB	—	✓	1st
https://techex.tv/_next/static/chunks/app/not-found-39f2b9ad80471c1b.js	2 KB	—	✓	1st
https://techex.tv/_next/static/chunks/836-d2b9d2b7279a5a68.js	11 KB	—	✓	1st
https://techex.tv/_next/static/chunks/712-e6ce613489ce00aa.js	11 KB	—	✓	1st
https://techex.tv/_next/static/chunks/app/page-8ed54873f807fec2.js	3 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

24 hints, 0 missing preconnects

PASS

24 hints, 0 missing preconnects

Page uses 24 resource hint(s)

Current Resource Hints

preconnect

—

preload

+14

dns-prefetch

—

prefetch

—

24 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+

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

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+

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

Network Waterfall

53 requests over 5029ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

31 images, 740 KB total, 33 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

740 KB

Oversized

Wasted

33 KB

9 missing dimensions 20 missing lazy loading

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