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https://aiagentskills.net

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
5
PASS
16
INFO
4

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

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

1.90 s

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

3.36 s

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

1.64 s

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

0.005

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

24.47 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.

8.14 s

Page Load Progression

2.2 s
4.5 s
6.7 s
9.0 s
11.2 s
13.5 s
15.7 s
18.0 s
Checks
27
16 PASS 5 REVIEW 2 FIX
F
JS Execution Cost
Action
7169ms total JS execution
FIX
7169ms total JS execution
Warning::
https://aiagentskills.net/: 3127ms CPU time
Warning::
https://aiagentskills.net/_next/static/chunks/5836...: 1648ms CPU time
Warning::
Unattributable: 654ms CPU time
Warning::
https://aiagentskills.net/cdn-cgi/challenge-platfo...: 573ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-3TLP...: 547ms CPU time
Info::
Third-party scripts: 656ms (9% of total)

Main Thread Breakdown

Script Evaluation 34% Style & Layout 32% Other 22% Rendering 7% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://aiagentskills.net/3127ms96ms79ms1st
https://aiagentskills.net/_next/static/chunks/5836-0e5a888f783c31ea.js1648ms739ms18ms1st
Unattributable654ms40ms0ms1st
https://aiagentskills.net/cdn-cgi/challenge-platform/scripts/jsd/main.js573ms533ms4ms1st
https://www.googletagmanager.com/gtag/js?id=G-3TLPF2VC0M547ms474ms61ms3rd
https://aiagentskills.net/_next/static/chunks/5cd64b6a-f0b5ace5478f67ee.js511ms436ms28ms1st
https://accounts.google.com/gsi/client59ms27ms32ms3rd
https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e178179150949650ms40ms0ms3rd
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
B
Third-Party Impact
52% third-party, 0 ms blocking
REVIEW
52% third-party, 0 ms blocking
Warning::
Third-party code accounts for 52% of page weight (398.7 KiB of 762.0 KiB)
Info::
Third-party blocking time is low (0 ms)
48%
52%
First-party Third-party
B
Image Optimization
18 images, 0 KB saveable
REVIEW
18 images, 0 KB saveable
Info::
All images are well-optimized
18 images 50 KB
0 oversized -0 KB
18 legacy format
0 missing dimensions CLS risk
B
JS Bundles
27 scripts, 142 KB unused
REVIEW
27 scripts, 142 KB unused
Warning::
https://accounts.google.com/gsi/client: 74 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-3TLP...: 68 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 142 KB
142 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://accounts.google.com/gsi/client99 KB74 KB (75%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-3TLPF2VC0M169 KB68 KB (41%)✓3rd
https://aiagentskills.net/_next/static/chunks/7337-8948fabbc8c4200f.js16 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e178179150949611 KB—✓3rd
https://aiagentskills.net/_next/static/chunks/main-app-121cba408599cb0b.js1 KB—✓1st
https://aiagentskills.net/_next/static/chunks/2030-d819de2dcaf03ec9.js3 KB—✓1st
https://aiagentskills.net/_next/static/chunks/app/layout-39ec439b89327ea9.js9 KB—✓1st
https://aiagentskills.net/_next/static/chunks/7929-967f882f26c8c47c.js8 KB—✓1st
https://aiagentskills.net/_next/static/chunks/app/error-639079d624bad474.js3 KB—✓1st
https://aiagentskills.net/_next/static/chunks/481-a77e496ad1992c66.js4 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

C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
JavaScript Blocking
2 JS blocking issue(s) detected
REVIEW
2 JS blocking issue(s) detected
Warning::
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.
Warning::
Total JS execution time is 7.2 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A
Page Weight Budget
762 KB transferred, 86 requests
PASS
762 KB transferred, 86 requests
Info::
Page weighs 2.4 MB (762 KB transferred)
Warning::
JavaScript is 533 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 533 KB
Info::
86 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
762 KB / 2.4 MB budget
762 KB transferred
86 requests
0.16 g CO2 per page load
JavaScript 533.3 KiB 70%
Other 70.7 KiB 9%
HTML 51.9 KiB 7%
Images 49.8 KiB 7%
CSS 43.3 KiB 6%
Other 9.9 KiB 1%
Other 1.5 KiB 0%
Other 915 B 0%
Other 859 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+
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+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 resource hints configured

A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
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
Info::
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
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: private, no-cache, no-store, max-age=0, must-revalidate
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`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).
Info::
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
86 resources · 762 KB · 142 KB savings available
PASS
86 resources · 762 KB · 142 KB savings available
Info::
Within 1MB page-weight target
Got: 762 KB
Info::
~142 KB of savings available
Warning::
44 third-party resources (52% of weight)
86 resources · 762.0 KiB · 44 third-party Within 1MB page-weight target
JavaScript 70% · 533.3 KiB
Document 15% · 117.0 KiB
Image 7% · 55.1 KiB
CSS 6% · 43.3 KiB
Other 2% · 13.4 KiB

~142.1 KiB of savings available

Remove unused JavaScript: 142.1 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
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
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: Cloudflare

Network Waterfall
86 requests over 18751ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 1.9 s LCP 3.4 shttps://aiagentskills.net// https://aiagentskills.net/ — 200 — 51.9 KiB — 13.5 s — h3https://aiagentskills.net/_next/static/css/74502deae3697534.css/_next/static/css/74502deae3697534.... https://aiagentskills.net/_next/static/css/74502deae3697534.css — 200 — 42.7 KiB — 34 ms — h3https://aiagentskills.net/_next/static/chunks/webpack-7f2d1d189df53256.js/_next/static/chunks/webpack-7f2d1d... https://aiagentskills.net/_next/static/chunks/webpack-7f2d1d189df53256.js — 200 — 2.3 KiB — 37 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 — 200 — 11.3 KiB — 44 ms — h2https://aiagentskills.net/manifest.webmanifest/manifest.webmanifest https://aiagentskills.net/manifest.webmanifest — 200 — 859 B — 91 ms — h3https://aiagentskills.net/_next/static/chunks/5cd64b6a-f0b5ace5478f67ee.js/_next/static/chunks/5cd64b6a-f0b5a... https://aiagentskills.net/_next/static/chunks/5cd64b6a-f0b5ace5478f67ee.js — 200 — 63.1 KiB — 104 ms — h3https://aiagentskills.net/_next/static/chunks/5836-0e5a888f783c31ea.js/_next/static/chunks/5836-0e5a888f7... https://aiagentskills.net/_next/static/chunks/5836-0e5a888f783c31ea.js — 200 — 51.6 KiB — 97 ms — h3https://aiagentskills.net/_next/static/chunks/main-app-121cba408599cb0b.js/_next/static/chunks/main-app-121cb... https://aiagentskills.net/_next/static/chunks/main-app-121cba408599cb0b.js — 200 — 708 B — 76 ms — h3https://aiagentskills.net/_next/static/chunks/2030-d819de2dcaf03ec9.js/_next/static/chunks/2030-d819de2dc... https://aiagentskills.net/_next/static/chunks/2030-d819de2dcaf03ec9.js — 200 — 3.4 KiB — 48 ms — h3https://aiagentskills.net/_next/static/chunks/app/layout-39ec439b89327ea9.js/_next/static/chunks/app/layout-39e... https://aiagentskills.net/_next/static/chunks/app/layout-39ec439b89327ea9.js — 200 — 9.0 KiB — 44 ms — h3https://aiagentskills.net/_next/static/chunks/7929-967f882f26c8c47c.js/_next/static/chunks/7929-967f882f2... https://aiagentskills.net/_next/static/chunks/7929-967f882f26c8c47c.js — 200 — 8.4 KiB — 78 ms — h3https://aiagentskills.net/_next/static/chunks/app/error-639079d624bad474.js/_next/static/chunks/app/error-6390... https://aiagentskills.net/_next/static/chunks/app/error-639079d624bad474.js — 200 — 2.9 KiB — 79 ms — h3https://aiagentskills.net/_next/static/chunks/481-a77e496ad1992c66.js/_next/static/chunks/481-a77e496ad1... https://aiagentskills.net/_next/static/chunks/481-a77e496ad1992c66.js — 200 — 4.1 KiB — 79 ms — h3https://aiagentskills.net/_next/static/chunks/1406-2e94d5abc6039fb4.js/_next/static/chunks/1406-2e94d5abc... https://aiagentskills.net/_next/static/chunks/1406-2e94d5abc6039fb4.js — 200 — 5.8 KiB — 78 ms — h3https://aiagentskills.net/_next/static/chunks/app/not-found-da1f2bbd38cf30e4.js/_next/static/chunks/app/not-found-... https://aiagentskills.net/_next/static/chunks/app/not-found-da1f2bbd38cf30e4.js — 200 — 651 B — 78 ms — h3https://aiagentskills.net/_next/static/chunks/7337-8948fabbc8c4200f.js/_next/static/chunks/7337-8948fabbc... https://aiagentskills.net/_next/static/chunks/7337-8948fabbc8c4200f.js — 200 — 15.5 KiB — 85 ms — h3https://aiagentskills.net/_next/static/chunks/1374-747212215df72aab.js/_next/static/chunks/1374-747212215... https://aiagentskills.net/_next/static/chunks/1374-747212215df72aab.js — 200 — 10.3 KiB — 49 ms — h3https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/layout-4b389a8a4abf446a.js/_next/static/chunks/app/%5Blocale%... https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/layout-4b389a8a4abf446a.js — 200 — 3.7 KiB — 89 ms — h3https://aiagentskills.net/_next/static/chunks/8392-488d1d9ec4bace3d.js/_next/static/chunks/8392-488d1d9ec... https://aiagentskills.net/_next/static/chunks/8392-488d1d9ec4bace3d.js — 200 — 4.8 KiB — 88 ms — h3https://aiagentskills.net/_next/static/chunks/4608-533dabb7602b3779.js/_next/static/chunks/4608-533dabb76... https://aiagentskills.net/_next/static/chunks/4608-533dabb7602b3779.js — 200 — 13.5 KiB — 96 ms — h3https://aiagentskills.net/_next/static/chunks/9718-c72de8dfb22323cc.js/_next/static/chunks/9718-c72de8dfb... https://aiagentskills.net/_next/static/chunks/9718-c72de8dfb22323cc.js — 200 — 10.5 KiB — 73 ms — h3https://aiagentskills.net/_next/static/chunks/3213-6623e3879f5b7589.js/_next/static/chunks/3213-6623e3879... https://aiagentskills.net/_next/static/chunks/3213-6623e3879f5b7589.js — 200 — 18.9 KiB — 94 ms — h3https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/(directory)/layout-e51fa7a88ede0bee.js/_next/static/chunks/app/%5Blocale%... https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/(directory)/layout-e51fa7a88ede0bee.js — 200 — 7.4 KiB — 78 ms — h3https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/(directory)/page-081d98d6e8a8fde1.js/_next/static/chunks/app/%5Blocale%... https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/(directory)/page-081d98d6e8a8fde1.js — 200 — 5.4 KiB — 93 ms — h3https://github.com/browser-use.png?size=84github.com/browser-use.png?size=84 https://github.com/browser-use.png?size=84 — 302 — 3.6 KiB — 253 ms — h2https://github.com/browser-use.png?size=35github.com/browser-use.png?size=35 https://github.com/browser-use.png?size=35 — 302 — 3.6 KiB — 251 ms — h2https://github.com/nexu-io.png?size=84github.com/nexu-io.png?size=84 https://github.com/nexu-io.png?size=84 — 302 — 3.6 KiB — 227 ms — h2https://github.com/nexu-io.png?size=35github.com/nexu-io.png?size=35 https://github.com/nexu-io.png?size=35 — 302 — 3.6 KiB — 293 ms — h2https://github.com/bytedance.png?size=84github.com/bytedance.png?size=84 https://github.com/bytedance.png?size=84 — 302 — 3.6 KiB — 250 ms — h2https://github.com/bytedance.png?size=35github.com/bytedance.png?size=35 https://github.com/bytedance.png?size=35 — 302 — 3.6 KiB — 226 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s FCP 1.9 s LCP 3.4 shttps://aiagentskills.net// https://aiagentskills.net/ — 200 — 51.9 KiB — 13.5 s — h3https://aiagentskills.net/_next/static/css/74502deae3697534.css/_next/static/css/74502deae3697534.... https://aiagentskills.net/_next/static/css/74502deae3697534.css — 200 — 42.7 KiB — 34 ms — h3https://aiagentskills.net/_next/static/chunks/webpack-7f2d1d189df53256.js/_next/static/chunks/webpack-7f2d1d... https://aiagentskills.net/_next/static/chunks/webpack-7f2d1d189df53256.js — 200 — 2.3 KiB — 37 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 — 200 — 11.3 KiB — 44 ms — h2https://aiagentskills.net/manifest.webmanifest/manifest.webmanifest https://aiagentskills.net/manifest.webmanifest — 200 — 859 B — 91 ms — h3https://aiagentskills.net/_next/static/chunks/5cd64b6a-f0b5ace5478f67ee.js/_next/static/chunks/5cd64b6a-f0b5a... https://aiagentskills.net/_next/static/chunks/5cd64b6a-f0b5ace5478f67ee.js — 200 — 63.1 KiB — 104 ms — h3https://aiagentskills.net/_next/static/chunks/5836-0e5a888f783c31ea.js/_next/static/chunks/5836-0e5a888f7... https://aiagentskills.net/_next/static/chunks/5836-0e5a888f783c31ea.js — 200 — 51.6 KiB — 97 ms — h3https://aiagentskills.net/_next/static/chunks/main-app-121cba408599cb0b.js/_next/static/chunks/main-app-121cb... https://aiagentskills.net/_next/static/chunks/main-app-121cba408599cb0b.js — 200 — 708 B — 76 ms — h3https://aiagentskills.net/_next/static/chunks/2030-d819de2dcaf03ec9.js/_next/static/chunks/2030-d819de2dc... https://aiagentskills.net/_next/static/chunks/2030-d819de2dcaf03ec9.js — 200 — 3.4 KiB — 48 ms — h3https://aiagentskills.net/_next/static/chunks/app/layout-39ec439b89327ea9.js/_next/static/chunks/app/layout-39e... https://aiagentskills.net/_next/static/chunks/app/layout-39ec439b89327ea9.js — 200 — 9.0 KiB — 44 ms — h3https://aiagentskills.net/_next/static/chunks/7929-967f882f26c8c47c.js/_next/static/chunks/7929-967f882f2... https://aiagentskills.net/_next/static/chunks/7929-967f882f26c8c47c.js — 200 — 8.4 KiB — 78 ms — h3https://aiagentskills.net/_next/static/chunks/app/error-639079d624bad474.js/_next/static/chunks/app/error-6390... https://aiagentskills.net/_next/static/chunks/app/error-639079d624bad474.js — 200 — 2.9 KiB — 79 ms — h3https://aiagentskills.net/_next/static/chunks/481-a77e496ad1992c66.js/_next/static/chunks/481-a77e496ad1... https://aiagentskills.net/_next/static/chunks/481-a77e496ad1992c66.js — 200 — 4.1 KiB — 79 ms — h3https://aiagentskills.net/_next/static/chunks/1406-2e94d5abc6039fb4.js/_next/static/chunks/1406-2e94d5abc... https://aiagentskills.net/_next/static/chunks/1406-2e94d5abc6039fb4.js — 200 — 5.8 KiB — 78 ms — h3https://aiagentskills.net/_next/static/chunks/app/not-found-da1f2bbd38cf30e4.js/_next/static/chunks/app/not-found-... https://aiagentskills.net/_next/static/chunks/app/not-found-da1f2bbd38cf30e4.js — 200 — 651 B — 78 ms — h3https://aiagentskills.net/_next/static/chunks/7337-8948fabbc8c4200f.js/_next/static/chunks/7337-8948fabbc... https://aiagentskills.net/_next/static/chunks/7337-8948fabbc8c4200f.js — 200 — 15.5 KiB — 85 ms — h3https://aiagentskills.net/_next/static/chunks/1374-747212215df72aab.js/_next/static/chunks/1374-747212215... https://aiagentskills.net/_next/static/chunks/1374-747212215df72aab.js — 200 — 10.3 KiB — 49 ms — h3https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/layout-4b389a8a4abf446a.js/_next/static/chunks/app/%5Blocale%... https://aiagentskills.net/_next/static/chunks/app/%5Blocale%5D/layout-4b389a8a4abf446a.js — 200 — 3.7 KiB — 89 ms — h3https://aiagentskills.net/_next/static/chunks/8392-488d1d9ec4bace3d.js/_next/static/chunks/8392-488d1d9ec... 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
9% of JavaScript execution is third-party
First-party Third-party 656ms · 279KB · €10/mo
Google Tag Manager
Tag Manager
Costly
Execution 547ms
Transfer 169 KB
Unused 41%
Monthly Cost €9/mo
accounts.google.com
Other
Optional
Execution 59ms
Transfer 99 KB
Unused 75%
Monthly Cost €1/mo
static.cloudflareinsights.com
Other
Optional
Execution 50ms
Transfer 11 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 547ms and costs ~€9/month

Google Tag Manager takes 547ms 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

75% of accounts.google.com'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

Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-07-28 — 2026-08-24)

LCP (p75)

4364 ms

53% good

INP (p75)

76 ms

98% good

CLS (p75)

0.000

100% good

FCP (p75)

4169 ms

TTFB (p75)

4270 ms

Image Optimization
58 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

58

Total Size

0 KB

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

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