Skip to content
https://penzu.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
3
PASS
11
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
62
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

1.77 s

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

8.31 s

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

471 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.

3.61 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.

8.31 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
17
11 PASS 3 REVIEW 1 FIX
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
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
Info::
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

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
C
JS Execution Cost
Action
1566ms total JS execution
REVIEW
1566ms total JS execution
Warning::
https://penzu.com/_next/static/chunks/1255-248bb39...: 411ms CPU time
Warning::
https://penzu.com/: 336ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-SCST...: 222ms CPU time
Info::
https://penzu.com/_next/static/chunks/c857e369-da9...: 211ms CPU time
Info::
Unattributable: 192ms CPU time
Info::
Third-party scripts: 545ms (35% of total)

Main Thread Breakdown

Script Evaluation 53% Other 17% Script Parsing & Compilation 13% Style & Layout 12%
ScriptTotalScriptingParse/CompileParty
https://penzu.com/_next/static/chunks/1255-248bb39a7979b323.js411ms365ms13ms1st
https://penzu.com/336ms13ms26ms1st
https://www.googletagmanager.com/gtag/js?id=G-SCST8L650K&cx=c&gtm=4e64h1222ms178ms40ms3rd
https://penzu.com/_next/static/chunks/c857e369-da905be1d23b2b43.js211ms182ms27ms1st
Unattributable192ms7ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-5NRNLRS131ms96ms33ms3rd
https://penzu.com/_next/static/chunks/4bd1b696-2344c7e56caf6588.js63ms15ms22ms1st
C
JS Bundles
Action
28 scripts, 220 KB unused
REVIEW
28 scripts, 220 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-SCST...: 67 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://penzu.com/_next/static/chunks/c857e369-da9...: 67 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-5NR...: 63 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://penzu.com/_next/static/chunks/5827-68d7367...: 23 KB unused (91%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 220 KB
220 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-SCST8L650K&cx=c&gtm=4e64h1163 KB67 KB (41%)✓3rd
https://penzu.com/_next/static/chunks/c857e369-da905be1d23b2b43.js91 KB67 KB (74%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-5NRNLRS120 KB63 KB (53%)✓3rd
https://penzu.com/_next/static/chunks/5827-68d73673c4d10db3.js26 KB23 KB (91%)✓1st
https://penzu.com/_next/static/chunks/app/global-error-7e8daf17d1a8e40d.js1 KB—✓1st
https://penzu.com/_next/static/chunks/2297-12aebb60c65859fb.js24 KB—✓1st
https://penzu.com/_next/static/chunks/5082-1a5453196af2fa70.js7 KB—✓1st
https://penzu.com/_next/static/chunks/9550-e2d9164e0f56a127.js6 KB—✓1st
https://penzu.com/_next/static/chunks/app/(default)/layout-3229abee30e009cd.js3 KB—✓1st
https://penzu.com/_next/static/chunks/1356-49295ddec4df9559.js6 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

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

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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
949 KB transferred, 42 requests
PASS
949 KB transferred, 42 requests
Info::
Page weighs 2.4 MB (949 KB transferred)
Warning::
JavaScript is 625 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 625 KB
Info::
42 HTTP requests
Info::
Estimated 0.19 g CO2 per page load
949 KB / 2.4 MB budget
949 KB transferred
42 requests
0.19 g CO2 per page load
JavaScript 624.6 KiB 66%
Fonts 143.4 KiB 15%
Images 102.0 KiB 11%
HTML 44.9 KiB 5%
CSS 17.8 KiB 2%
Other 14.9 KiB 2%
Other 545 B 0%
Other 545 B 0%
Other 88 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

A
Third-Party Impact
30% third-party, 0 ms blocking
PASS
30% third-party, 0 ms blocking
Info::
Third-party code accounts for 30% of page weight (284.5 KiB of 948.7 KiB)
Info::
Third-party blocking time is low (0 ms)
70%
30%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Image Optimization
4 images, 0 KB saveable
PASS
4 images, 0 KB saveable
Info::
All images are well-optimized
4 images 102 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (143 KB)
PASS
2 fonts (143 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

143 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 1.8 s LCP 8.3 shttps://penzu.com/_next/static/media/1f3fe8c6df3d47c1-s.p.woff21f3fe8c6df3d47c1-s.p.woff2 https://penzu.com/_next/static/media/1f3fe8c6df3d47c1-s.p.woff2 — 95.8 KiB — 388 ms — font-display: swaphttps://penzu.com/_next/static/media/e4af272ccee01ff0-s.p.woff2e4af272ccee01ff0-s.p.woff2 https://penzu.com/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 47.7 KiB — 388 ms — font-display: swap
1f3fe8c6df3d47c1-s.p.woff2 woff2 swap
Size 96 KB
Load time 388 ms
Start 327 ms
Risk FOUT — text flashes from fallback to web font
e4af272ccee01ff0-s.p.woff2 woff2 swap
Size 48 KB
Load time 388 ms
Start 328 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+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
Page uses 8 resource hint(s)

Current Resource Hints

preconnect
—
preload
8
dns-prefetch
—
prefetch
—

8 resource hints configured

A
Page Weight Inventory
42 resources · 949 KB · 220 KB savings available
PASS
42 resources · 949 KB · 220 KB savings available
Info::
Within 1MB page-weight target
Got: 949 KB
Info::
~220 KB of savings available
Info::
7 third-party resources (30% of weight)
42 resources · 948.7 KiB · 7 third-party Within 1MB page-weight target
JavaScript 66% · 624.6 KiB
Font 15% · 143.4 KiB
Image 12% · 116.8 KiB
Document 5% · 44.9 KiB
CSS 2% · 17.8 KiB
Other 0% · 1.2 KiB

~220.3 KiB of savings available

Remove unused JavaScript: 220.3 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
42 requests over 1583ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 1.8 s LCP 8.3 shttps://penzu.com// https://penzu.com/ — 200 — 44.9 KiB — 493 ms — h2https://penzu.com/_next/static/media/1f3fe8c6df3d47c1-s.p.woff2/_next/static/media/1f3fe8c6df3d47c... https://penzu.com/_next/static/media/1f3fe8c6df3d47c1-s.p.woff2 — 200 — 95.8 KiB — 388 ms — h2https://penzu.com/_next/static/media/e4af272ccee01ff0-s.p.woff2/_next/static/media/e4af272ccee01ff... https://penzu.com/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 200 — 47.7 KiB — 388 ms — h2https://penzu.com/_next/static/css/2ff163e3720bf447.css/_next/static/css/2ff163e3720bf447.... https://penzu.com/_next/static/css/2ff163e3720bf447.css — 200 — 15.1 KiB — 314 ms — h2https://penzu.com/_next/static/css/bee9e1170c7ea52e.css/_next/static/css/bee9e1170c7ea52e.... https://penzu.com/_next/static/css/bee9e1170c7ea52e.css — 200 — 2.7 KiB — 314 ms — h2https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fhero-image-03.9070c3b3.jpg&w=1080&q=75/_next/image?url=%2F_next%2Fstatic%... https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fhero-image-03.9070c3b3.jpg&w=1080&q=75 — 200 — 21.5 KiB — 386 ms — h2https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fpenzu-logo-white.b5f20c3f.png&w=256&q=75/_next/image?url=%2F_next%2Fstatic%... https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fpenzu-logo-white.b5f20c3f.png&w=256&q=75 — 200 — 5.6 KiB — 384 ms — h2https://penzu.com/_next/static/chunks/webpack-f83f81a2bedd416f.js/_next/static/chunks/webpack-f83f81... https://penzu.com/_next/static/chunks/webpack-f83f81a2bedd416f.js — 200 — 2.5 KiB — 384 ms — h2https://penzu.com/_next/static/chunks/4bd1b696-2344c7e56caf6588.js/_next/static/chunks/4bd1b696-2344c... https://penzu.com/_next/static/chunks/4bd1b696-2344c7e56caf6588.js — 200 — 53.6 KiB — 393 ms — h2https://penzu.com/_next/static/chunks/1255-248bb39a7979b323.js/_next/static/chunks/1255-248bb39a7... https://penzu.com/_next/static/chunks/1255-248bb39a7979b323.js — 200 — 45.4 KiB — 403 ms — h2https://penzu.com/_next/static/chunks/main-app-23d052ebd024276b.js/_next/static/chunks/main-app-23d05... https://penzu.com/_next/static/chunks/main-app-23d052ebd024276b.js — 200 — 673 B — 383 ms — h2https://penzu.com/_next/static/chunks/1356-49295ddec4df9559.js/_next/static/chunks/1356-49295ddec... https://penzu.com/_next/static/chunks/1356-49295ddec4df9559.js — 200 — 5.6 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/2619-438d7f127d133662.js/_next/static/chunks/2619-438d7f127... https://penzu.com/_next/static/chunks/2619-438d7f127d133662.js — 200 — 3.6 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/5082-1a5453196af2fa70.js/_next/static/chunks/5082-1a5453196... https://penzu.com/_next/static/chunks/5082-1a5453196af2fa70.js — 200 — 6.6 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/9550-e2d9164e0f56a127.js/_next/static/chunks/9550-e2d9164e0... https://penzu.com/_next/static/chunks/9550-e2d9164e0f56a127.js — 200 — 6.4 KiB — 382 ms — h2https://penzu.com/_next/static/chunks/app/(default)/layout-3229abee30e009cd.js/_next/static/chunks/app/(default)/... https://penzu.com/_next/static/chunks/app/(default)/layout-3229abee30e009cd.js — 200 — 3.4 KiB — 382 ms — h2https://penzu.com/_next/static/chunks/c857e369-da905be1d23b2b43.js/_next/static/chunks/c857e369-da905... https://penzu.com/_next/static/chunks/c857e369-da905be1d23b2b43.js — 200 — 91.0 KiB — 403 ms — h2https://penzu.com/_next/static/chunks/5376-95f546b06523f61a.js/_next/static/chunks/5376-95f546b06... https://penzu.com/_next/static/chunks/5376-95f546b06523f61a.js — 200 — 7.4 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/6977-20282cc18192adb7.js/_next/static/chunks/6977-20282cc18... https://penzu.com/_next/static/chunks/6977-20282cc18192adb7.js — 200 — 11.5 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/app/(default)/page-70f993b44946118a.js/_next/static/chunks/app/(default)/... https://penzu.com/_next/static/chunks/app/(default)/page-70f993b44946118a.js — 200 — 540 B — 380 ms — h2https://penzu.com/_next/static/chunks/343-df1ad247851217d3.js/_next/static/chunks/343-df1ad24785... https://penzu.com/_next/static/chunks/343-df1ad247851217d3.js — 200 — 14.9 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/app/global-error-7e8daf17d1a8e40d.js/_next/static/chunks/app/global-err... https://penzu.com/_next/static/chunks/app/global-error-7e8daf17d1a8e40d.js — 200 — 1.1 KiB — 384 ms — h2https://penzu.com/_next/static/chunks/2297-12aebb60c65859fb.js/_next/static/chunks/2297-12aebb60c... https://penzu.com/_next/static/chunks/2297-12aebb60c65859fb.js — 200 — 24.5 KiB — 398 ms — h2https://penzu.com/_next/static/chunks/6758-6a77387ded244a17.js/_next/static/chunks/6758-6a77387de... https://penzu.com/_next/static/chunks/6758-6a77387ded244a17.js — 200 — 12.2 KiB — 398 ms — h2https://penzu.com/_next/static/chunks/5330-949c0efee883f34b.js/_next/static/chunks/5330-949c0efee... https://penzu.com/_next/static/chunks/5330-949c0efee883f34b.js — 200 — 3.1 KiB — 398 ms — h2https://penzu.com/_next/static/chunks/5827-68d73673c4d10db3.js/_next/static/chunks/5827-68d73673c... https://penzu.com/_next/static/chunks/5827-68d73673c4d10db3.js — 200 — 25.5 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/app/layout-8fb522518b4ecaf2.js/_next/static/chunks/app/layout-8fb... https://penzu.com/_next/static/chunks/app/layout-8fb522518b4ecaf2.js — 200 — 2.3 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/app/not-found-53eac3a3f87e3335.js/_next/static/chunks/app/not-found-... https://penzu.com/_next/static/chunks/app/not-found-53eac3a3f87e3335.js — 200 — 3.7 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/943.acef01ca6d07b603.js/_next/static/chunks/943.acef01ca6d... https://penzu.com/_next/static/chunks/943.acef01ca6d07b603.js — 200 — 748 B — 397 ms — h2https://penzu.com/_next/static/chunks/5594.77e41d7f0e7e558b.js/_next/static/chunks/5594.77e41d7f0... https://penzu.com/_next/static/chunks/5594.77e41d7f0e7e558b.js — 200 — 1.8 KiB — 397 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 1.8 s LCP 8.3 shttps://penzu.com// https://penzu.com/ — 200 — 44.9 KiB — 493 ms — h2https://penzu.com/_next/static/media/1f3fe8c6df3d47c1-s.p.woff2/_next/static/media/1f3fe8c6df3d47c... https://penzu.com/_next/static/media/1f3fe8c6df3d47c1-s.p.woff2 — 200 — 95.8 KiB — 388 ms — h2https://penzu.com/_next/static/media/e4af272ccee01ff0-s.p.woff2/_next/static/media/e4af272ccee01ff... https://penzu.com/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 200 — 47.7 KiB — 388 ms — h2https://penzu.com/_next/static/css/2ff163e3720bf447.css/_next/static/css/2ff163e3720bf447.... https://penzu.com/_next/static/css/2ff163e3720bf447.css — 200 — 15.1 KiB — 314 ms — h2https://penzu.com/_next/static/css/bee9e1170c7ea52e.css/_next/static/css/bee9e1170c7ea52e.... https://penzu.com/_next/static/css/bee9e1170c7ea52e.css — 200 — 2.7 KiB — 314 ms — h2https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fhero-image-03.9070c3b3.jpg&w=1080&q=75/_next/image?url=%2F_next%2Fstatic%... https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fhero-image-03.9070c3b3.jpg&w=1080&q=75 — 200 — 21.5 KiB — 386 ms — h2https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fpenzu-logo-white.b5f20c3f.png&w=256&q=75/_next/image?url=%2F_next%2Fstatic%... https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Fpenzu-logo-white.b5f20c3f.png&w=256&q=75 — 200 — 5.6 KiB — 384 ms — h2https://penzu.com/_next/static/chunks/webpack-f83f81a2bedd416f.js/_next/static/chunks/webpack-f83f81... https://penzu.com/_next/static/chunks/webpack-f83f81a2bedd416f.js — 200 — 2.5 KiB — 384 ms — h2https://penzu.com/_next/static/chunks/4bd1b696-2344c7e56caf6588.js/_next/static/chunks/4bd1b696-2344c... https://penzu.com/_next/static/chunks/4bd1b696-2344c7e56caf6588.js — 200 — 53.6 KiB — 393 ms — h2https://penzu.com/_next/static/chunks/1255-248bb39a7979b323.js/_next/static/chunks/1255-248bb39a7... https://penzu.com/_next/static/chunks/1255-248bb39a7979b323.js — 200 — 45.4 KiB — 403 ms — h2https://penzu.com/_next/static/chunks/main-app-23d052ebd024276b.js/_next/static/chunks/main-app-23d05... https://penzu.com/_next/static/chunks/main-app-23d052ebd024276b.js — 200 — 673 B — 383 ms — h2https://penzu.com/_next/static/chunks/1356-49295ddec4df9559.js/_next/static/chunks/1356-49295ddec... https://penzu.com/_next/static/chunks/1356-49295ddec4df9559.js — 200 — 5.6 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/2619-438d7f127d133662.js/_next/static/chunks/2619-438d7f127... https://penzu.com/_next/static/chunks/2619-438d7f127d133662.js — 200 — 3.6 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/5082-1a5453196af2fa70.js/_next/static/chunks/5082-1a5453196... https://penzu.com/_next/static/chunks/5082-1a5453196af2fa70.js — 200 — 6.6 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/9550-e2d9164e0f56a127.js/_next/static/chunks/9550-e2d9164e0... https://penzu.com/_next/static/chunks/9550-e2d9164e0f56a127.js — 200 — 6.4 KiB — 382 ms — h2https://penzu.com/_next/static/chunks/app/(default)/layout-3229abee30e009cd.js/_next/static/chunks/app/(default)/... https://penzu.com/_next/static/chunks/app/(default)/layout-3229abee30e009cd.js — 200 — 3.4 KiB — 382 ms — h2https://penzu.com/_next/static/chunks/c857e369-da905be1d23b2b43.js/_next/static/chunks/c857e369-da905... https://penzu.com/_next/static/chunks/c857e369-da905be1d23b2b43.js — 200 — 91.0 KiB — 403 ms — h2https://penzu.com/_next/static/chunks/5376-95f546b06523f61a.js/_next/static/chunks/5376-95f546b06... https://penzu.com/_next/static/chunks/5376-95f546b06523f61a.js — 200 — 7.4 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/6977-20282cc18192adb7.js/_next/static/chunks/6977-20282cc18... https://penzu.com/_next/static/chunks/6977-20282cc18192adb7.js — 200 — 11.5 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/app/(default)/page-70f993b44946118a.js/_next/static/chunks/app/(default)/... https://penzu.com/_next/static/chunks/app/(default)/page-70f993b44946118a.js — 200 — 540 B — 380 ms — h2https://penzu.com/_next/static/chunks/343-df1ad247851217d3.js/_next/static/chunks/343-df1ad24785... https://penzu.com/_next/static/chunks/343-df1ad247851217d3.js — 200 — 14.9 KiB — 381 ms — h2https://penzu.com/_next/static/chunks/app/global-error-7e8daf17d1a8e40d.js/_next/static/chunks/app/global-err... https://penzu.com/_next/static/chunks/app/global-error-7e8daf17d1a8e40d.js — 200 — 1.1 KiB — 384 ms — h2https://penzu.com/_next/static/chunks/2297-12aebb60c65859fb.js/_next/static/chunks/2297-12aebb60c... https://penzu.com/_next/static/chunks/2297-12aebb60c65859fb.js — 200 — 24.5 KiB — 398 ms — h2https://penzu.com/_next/static/chunks/6758-6a77387ded244a17.js/_next/static/chunks/6758-6a77387de... https://penzu.com/_next/static/chunks/6758-6a77387ded244a17.js — 200 — 12.2 KiB — 398 ms — h2https://penzu.com/_next/static/chunks/5330-949c0efee883f34b.js/_next/static/chunks/5330-949c0efee... https://penzu.com/_next/static/chunks/5330-949c0efee883f34b.js — 200 — 3.1 KiB — 398 ms — h2https://penzu.com/_next/static/chunks/5827-68d73673c4d10db3.js/_next/static/chunks/5827-68d73673c... https://penzu.com/_next/static/chunks/5827-68d73673c4d10db3.js — 200 — 25.5 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/app/layout-8fb522518b4ecaf2.js/_next/static/chunks/app/layout-8fb... https://penzu.com/_next/static/chunks/app/layout-8fb522518b4ecaf2.js — 200 — 2.3 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/app/not-found-53eac3a3f87e3335.js/_next/static/chunks/app/not-found-... https://penzu.com/_next/static/chunks/app/not-found-53eac3a3f87e3335.js — 200 — 3.7 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/943.acef01ca6d07b603.js/_next/static/chunks/943.acef01ca6d... https://penzu.com/_next/static/chunks/943.acef01ca6d07b603.js — 200 — 748 B — 397 ms — h2https://penzu.com/_next/static/chunks/5594.77e41d7f0e7e558b.js/_next/static/chunks/5594.77e41d7f0... https://penzu.com/_next/static/chunks/5594.77e41d7f0e7e558b.js — 200 — 1.8 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/6352.6e8277e2ac005f15.js/_next/static/chunks/6352.6e8277e2a... https://penzu.com/_next/static/chunks/6352.6e8277e2ac005f15.js — 200 — 1.8 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/2253.57c47417015ee1b2.js/_next/static/chunks/2253.57c474170... https://penzu.com/_next/static/chunks/2253.57c47417015ee1b2.js — 200 — 10.2 KiB — 397 ms — h2https://penzu.com/_next/static/chunks/2072.e04f3d0542ab26b2.js/_next/static/chunks/2072.e04f3d054... https://penzu.com/_next/static/chunks/2072.e04f3d0542ab26b2.js — 200 — 1.8 KiB — 396 ms — h2https://sessions.bugsnag.com/sessions.bugsnag.com/ https://sessions.bugsnag.com/ — 200 — 0 B — 214 ms — h2https://penzu.com/favicon.ico/favicon.ico https://penzu.com/favicon.ico — 200 — 14.9 KiB — 99 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-5NRNLRSwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-5NRNLRS — 200 — 120.2 KiB — 153 ms — h2https://sessions.bugsnag.com/sessions.bugsnag.com/ https://sessions.bugsnag.com/ — 202 — 88 B — 153 ms — h2https://www.googletagmanager.com/gtag/js?id=G-SCST8L650K&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-SCST8L650K&cx=c&gtm=4e64h1 — 200 — 162.8 KiB — 52 ms — h2https://region1.analytics.google.com/g/collect?v=2&tid=G-SCST8L650K&gtm=45je64h1v9113939603z89113938064za20gzb9113938064zd9113938064&_p=1776813077535&_gaz=1&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAAAGA&are=1&cid=11521542.1776813078&frm=0&pscdl=noapi&rcb=0&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117384406~118128923&sid=1776813077&sct=1&seg=0&dl=https%3A%2F%2Fpenzu.com%2F&dt=Write%20In%20Private%3A%20Free%20Online%20Diary%20And%20Personal%20Journal%20%7C%20Penzu&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1246region1.analytics.google.com/g/coll... https://region1.analytics.google.com/g/collect?v=2&tid=G-SCST8L650K&gtm=45je64h1v9113939603z89113938064za20gzb9113938064zd9113938064&_p=1776813077535&_gaz=1&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAAAGA&are=1&cid=11521542.1776813078&frm=0&pscdl=noapi&rcb=0&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117384406~118128923&sid=1776813077&sct=1&seg=0&dl=https%3A%2F%2Fpenzu.com%2F&dt=Write%20In%20Private%3A%20Free%20Online%20Diary%20And%20Personal%20Journal%20%7C%20Penzu&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1246 — 204 — 545 B — 88 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-SCST8L650K&cid=11521542.1776813078&gtm=45je64h1v9113939603z89113938064za20gzb9113938064zd9113938064&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~118128923stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-SCST8L650K&cid=11521542.1776813078&gtm=45je64h1v9113939603z89113938064za20gzb9113938064zd9113938064&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~118128923 — 204 — 545 B — 91 ms — h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-SCST8L650K&cid=11521542.1776813078&gtm=45je64h1v9113939603z89113938064za20gzb9113938064zd9113938064&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~118128923&z=228372959www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-SCST8L650K&cid=11521542.1776813078&gtm=45je64h1v9113939603z89113938064za20gzb9113938064zd9113938064&rcb=0&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938469~117266401~117384406~118128923&z=228372959 — 200 — 408 B — 94 ms — h2https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Ffeatures-home-customize.7c671fcf.jpg&w=1920&q=75/_next/image?url=%2F_next%2Fstatic%... https://penzu.com/_next/image?url=%2F_next%2Fstatic%2Fmedia%2Ffeatures-home-customize.7c671fcf.jpg&w=1920&q=75 — 200 — 74.4 KiB — 102 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
35% of JavaScript execution is third-party
First-party Third-party 545ms · 283KB · €9/mo
Google Tag Manager
Tag Manager
Costly
Execution 222ms
Transfer 163 KB
Unused 41%
Monthly Cost €4/mo
Unattributable
Other
Optional
Execution 192ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 131ms
Transfer 120 KB
Unused 53%
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 222ms and costs ~€4/month

Google Tag Manager takes 222ms 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

53% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

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

Send Feedback