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Performance

· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
5
REVIEW
7
PASS
12
INFO
4

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

48
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
80
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

1.98 s

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

11.80 s

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

714 ms

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

0.148

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

3.88 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.

18.48 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
28
12 PASS 7 REVIEW 5 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 62 requests
FIX
2.9 MB transferred, 62 requests
Warning::
Page weighs 5.7 MB (2.9 MB transferred)
Warning::
JavaScript is 2.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.0 MB
Info::
Fonts are 280 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 280 KB
Info::
62 HTTP requests
Info::
Estimated 0.60 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
62 requests
0.60 g CO2 per page load
JavaScript 2.0 MiB 70%
Fonts 280.0 KiB 10%
Other 203.5 KiB 7%
Images 152.4 KiB 5%
HTML 147.6 KiB 5%
Other 47.3 KiB 2%
CSS 35.6 KiB 1%
Other 23.6 KiB 1%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over 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

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

D
JS Execution Cost
Action
2687ms total JS execution
FIX
2687ms total JS execution
Warning::
Unattributable: 382ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-KXPK...: 276ms CPU time
Warning::
https://loremipsum.io/_next/static/chunks/255-102f...: 255ms CPU time
Warning::
https://loremipsum.io/: 253ms CPU time
Info::
https://a.pub.network/loremipsum-io/ab_test/histor...: 234ms CPU time
Warning::
Third-party scripts: 1421ms (53% of total)

Main Thread Breakdown

Script Evaluation 62% Script Parsing & Compilation 15% Other 14% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
Unattributable382ms71ms0ms1st
https://www.googletagmanager.com/gtag/js?id=G-KXPKVKP7EK276ms213ms59ms3rd
https://loremipsum.io/_next/static/chunks/255-102f2e5b2e3dc2ef.js255ms208ms27ms1st
https://loremipsum.io/253ms11ms13ms1st
https://a.pub.network/loremipsum-io/ab_test/history/dec49155-6b61-493f-9faa-98491eeaded3/prebid.js234ms159ms72ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202609220101/pubads_impl.js213ms146ms64ms3rd
https://a.pub.network/loremipsum-io/ab_test/history/dec49155-6b61-493f-9faa-98491eeaded3/pubfig.engine.mobile.js205ms161ms42ms3rd
https://loremipsum.io/_next/static/chunks/4bd1b696-c023c6e3521b1417.js191ms171ms18ms1st
https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js170ms142ms9ms3rd
https://loremipsum.io/_next/static/chunks/963-21efee6d45fc58c8.js129ms117ms12ms1st

Showing top 10 of 15 scripts

F
JS Bundles
Action
29 scripts, 744 KB unused
FIX
29 scripts, 744 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 163 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://a.pub.network/loremipsum-io/ab_test/histor...: 156 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://a.pub.network/loremipsum-io/ab_test/histor...: 155 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-KXPK...: 71 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://loremipsum.io/_next/static/chunks/255-102f...: 68 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 744 KB
744 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202609220101/pubads_impl.js212 KB163 KB (77%)✓3rd
https://a.pub.network/loremipsum-io/ab_test/history/dec49155-6b61-493f-9faa-98491eeaded3/prebid.js192 KB156 KB (81%)✓3rd
https://a.pub.network/loremipsum-io/ab_test/history/dec49155-6b61-493f-9faa-98491eeaded3/pubfig.engine.mobile.js195 KB155 KB (80%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-KXPKVKP7EK164 KB71 KB (43%)✓3rd
https://loremipsum.io/_next/static/chunks/255-102f2e5b2e3dc2ef.js169 KB68 KB (40%)✓1st
https://loremipsum.io/_next/static/chunks/4bd1b696-c023c6e3521b1417.js169 KB54 KB (32%)✓1st
https://loremipsum.io/_next/static/chunks/963-21efee6d45fc58c8.js134 KB54 KB (40%)✓1st
https://loremipsum.io/_next/static/chunks/151-0a87f2721d0c45ab.js105 KB24 KB (23%)✓1st
https://a.pub.network/loremipsum-io/ab_test/history/dec49155-6b61-493f-9faa-98491eeaded3/pubfig.min.js?bypass=true32 KB—✓3rd
https://loremipsum.io/_next/static/chunks/e9014f26-2a3e0b18e14369e5.js399 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

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

F
Page Weight Inventory
Action
62 resources · 2.9 MB · 744 KB savings available
FIX
62 resources · 2.9 MB · 744 KB savings available
Warning::
Page weight 2.9 MB exceeds 1 MB target by 1.9 MB
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~744 KB of savings available
Warning::
33 third-party resources (44% of weight)
Info::
2 resources over 200KB
62 resources · 2.9 MiB · 33 third-party 1.9 MiB over 1MB target
JavaScript 70% · 2.0 MiB
Font 10% · 280.0 KiB
Other 9% · 266.4 KiB
Image 5% · 159.8 KiB
Document 5% · 147.6 KiB
CSS 1% · 35.6 KiB

~744.1 KiB of savings available

Remove unused JavaScript: 744.1 KiB
D
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Third-Party Impact
44% third-party, 0 ms blocking
REVIEW
44% third-party, 0 ms blocking
Info::
Third-party code accounts for 44% of page weight (1.3 MiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
56%
44%
First-party Third-party
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Document Compression
Action
Document response served uncompressed
REVIEW
Document 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
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
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.
B
JavaScript Blocking
1 JS blocking issue(s) detected
REVIEW
1 JS blocking issue(s) detected
Warning::
5 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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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 152 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
4 fonts (280 KB)
PASS
4 fonts (280 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

280 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.0 s LCP 11.8 shttps://loremipsum.io/_next/static/media/5d39360912ab897b-s.p.woff25d39360912ab897b-s.p.woff2 https://loremipsum.io/_next/static/media/5d39360912ab897b-s.p.woff2 — 67.2 KiB — 44 ms — font-display: swaphttps://loremipsum.io/_next/static/media/acc997c86979663b-s.p.woff2acc997c86979663b-s.p.woff2 https://loremipsum.io/_next/static/media/acc997c86979663b-s.p.woff2 — 70.1 KiB — 50 ms — font-display: swaphttps://loremipsum.io/_next/static/media/cb8d34571a43f897-s.p.woff2cb8d34571a43f897-s.p.woff2 https://loremipsum.io/_next/static/media/cb8d34571a43f897-s.p.woff2 — 69.8 KiB — 67 ms — font-display: swaphttps://loremipsum.io/_next/static/media/f7a9b128ae841a36-s.p.woff2f7a9b128ae841a36-s.p.woff2 https://loremipsum.io/_next/static/media/f7a9b128ae841a36-s.p.woff2 — 72.9 KiB — 53 ms — font-display: swap
5d39360912ab897b-s.p.woff2 woff2 swap
Size 67 KB
Load time 44 ms
Start 74 ms
Risk FOUT — text flashes from fallback to web font
acc997c86979663b-s.p.woff2 woff2 swap
Size 70 KB
Load time 50 ms
Start 76 ms
Risk FOUT — text flashes from fallback to web font
cb8d34571a43f897-s.p.woff2 woff2 swap
Size 70 KB
Load time 67 ms
Start 79 ms
Risk FOUT — text flashes from fallback to web font
f7a9b128ae841a36-s.p.woff2 woff2 swap
Size 73 KB
Load time 53 ms
Start 79 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
17 hints, 0 missing preconnects
PASS
17 hints, 0 missing preconnects
Info::
11 preconnect hints -- excessive (recommended: <=6)
Each preconnect eagerly opens a TCP+TLS connection. On slow networks or low-end devices, too many parallel connections cause head-of-line blocking and starve the connections that matter for LCP. Trim to the 4-6 highest-value origins (the ones serving render-blocking or LCP resources).
Info::
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://edge.cdn-vitals.com (preconnect+preconnect).
Info::
Page uses 17 resource hint(s)

Current Resource Hints

preconnect
+1
11
preload
6
dns-prefetch
—
prefetch
—

17 resource hints configured

Each preconnect eagerly opens a TCP+TLS connection. On slow networks or low-end devices, too many parallel connections cause head-of-line blocking and starve the connections that matter for LCP. Trim to the 4-6 highest-value origins (the ones serving render-blocking or LCP resources).

Why this matters

Informational: a labeled value pair from the audit.

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

Why this matters

Performance issues directly impact user engagement and conversion rates.

A+
Asset Compression
All 2 asset hosts use brotli
PASS
All 2 asset hosts use brotli
Info::
a.pub.network serves assets with brotli (assets: 4)
Got: a.pub.network (application/javascript)
Info::
cdn.privacy-mgmt.com serves assets with brotli (assets: 3)
Got: cdn.privacy-mgmt.com (text/javascript)
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+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
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+
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
Network Waterfall
62 requests over 2680ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 2.0 s LCP 11.8 shttps://loremipsum.io// https://loremipsum.io/ — 200 — 145.2 KiB — 104 ms — h2https://loremipsum.io/_next/static/media/5d39360912ab897b-s.p.woff2/_next/static/media/5d39360912ab897... https://loremipsum.io/_next/static/media/5d39360912ab897b-s.p.woff2 — 200 — 67.2 KiB — 44 ms — h2https://loremipsum.io/_next/static/media/acc997c86979663b-s.p.woff2/_next/static/media/acc997c86979663... https://loremipsum.io/_next/static/media/acc997c86979663b-s.p.woff2 — 200 — 70.1 KiB — 50 ms — h2https://loremipsum.io/_next/static/media/cb8d34571a43f897-s.p.woff2/_next/static/media/cb8d34571a43f89... https://loremipsum.io/_next/static/media/cb8d34571a43f897-s.p.woff2 — 200 — 69.8 KiB — 67 ms — h2https://loremipsum.io/_next/static/media/f7a9b128ae841a36-s.p.woff2/_next/static/media/f7a9b128ae841a3... https://loremipsum.io/_next/static/media/f7a9b128ae841a36-s.p.woff2 — 200 — 72.9 KiB — 53 ms — h2https://loremipsum.io/_next/static/css/c2e78001d34219ec.css/_next/static/css/c2e78001d34219ec.... https://loremipsum.io/_next/static/css/c2e78001d34219ec.css — 200 — 28.8 KiB — 51 ms — h2https://www.googletagmanager.com/gtag/js?id=G-KXPKVKP7EKwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-KXPKVKP7EK — 200 — 163.6 KiB — 214 ms — h2https://loremipsum.io/_next/static/chunks/webpack-88bbb02eab35f835.js/_next/static/chunks/webpack-88bbb0... https://loremipsum.io/_next/static/chunks/webpack-88bbb02eab35f835.js — 200 — 3.7 KiB — 35 ms — h2https://loremipsum.io/_next/static/chunks/4bd1b696-c023c6e3521b1417.js/_next/static/chunks/4bd1b696-c023c... https://loremipsum.io/_next/static/chunks/4bd1b696-c023c6e3521b1417.js — 200 — 169.5 KiB — 83 ms — h2https://loremipsum.io/_next/static/chunks/255-102f2e5b2e3dc2ef.js/_next/static/chunks/255-102f2e5b2e... https://loremipsum.io/_next/static/chunks/255-102f2e5b2e3dc2ef.js — 200 — 169.3 KiB — 69 ms — h2https://loremipsum.io/_next/static/chunks/main-app-0e767b34c4348844.js/_next/static/chunks/main-app-0e767... https://loremipsum.io/_next/static/chunks/main-app-0e767b34c4348844.js — 200 — 908 B — 34 ms — h2https://loremipsum.io/_next/static/chunks/e9014f26-2a3e0b18e14369e5.js/_next/static/chunks/e9014f26-2a3e0... https://loremipsum.io/_next/static/chunks/e9014f26-2a3e0b18e14369e5.js — 200 — 399.4 KiB — 78 ms — h2https://loremipsum.io/_next/static/chunks/963-21efee6d45fc58c8.js/_next/static/chunks/963-21efee6d45... https://loremipsum.io/_next/static/chunks/963-21efee6d45fc58c8.js — 200 — 133.8 KiB — 86 ms — h2https://loremipsum.io/_next/static/chunks/151-0a87f2721d0c45ab.js/_next/static/chunks/151-0a87f2721d... https://loremipsum.io/_next/static/chunks/151-0a87f2721d0c45ab.js — 200 — 104.6 KiB — 55 ms — h2https://loremipsum.io/_next/static/chunks/app/page-cd17934ce6ba7359.js/_next/static/chunks/app/page-cd179... https://loremipsum.io/_next/static/chunks/app/page-cd17934ce6ba7359.js — 200 — 1022 B — 49 ms — h2https://loremipsum.io/_next/static/chunks/759-1a5a3daeac4ca09d.js/_next/static/chunks/759-1a5a3daeac... https://loremipsum.io/_next/static/chunks/759-1a5a3daeac4ca09d.js — 200 — 6.9 KiB — 49 ms — h2https://loremipsum.io/_next/static/chunks/app/layout-7c82521a011c0410.js/_next/static/chunks/app/layout-7c8... https://loremipsum.io/_next/static/chunks/app/layout-7c82521a011c0410.js — 200 — 1.2 KiB — 84 ms — h2https://loremipsum.imgix.net/CZhWYZJ3UEpUrYOwBqZZ3/846c9c7fdc261fe79205833c6787f3fc/lorem-ipsum-magazine-layout_copy.jpg?w=640&q=60&auto=format,compressloremipsum.imgix.net/CZhWYZJ3UEpUrY... https://loremipsum.imgix.net/CZhWYZJ3UEpUrYOwBqZZ3/846c9c7fdc261fe79205833c6787f3fc/lorem-ipsum-magazine-layout_copy.jpg?w=640&q=60&auto=format,compress — 200 — 34.6 KiB — 63 ms — 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h2https://cdn.privacy-mgmt.com/wrapper/v2/messages?hasCsp=true&env=prod&body=%7B%22accountId%22%3A1638%2C%22campaignEnv%22%3A%22prod%22%2C%22campaigns%22%3A%7B%22gdpr%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22targetingParams%22%3A%7B%22fsStateOptIn%22%3Afalse%7D%7D%2C%22usnat%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22hasLocalData%22%3Afalse%2C%22targetingParams%22%3A%7B%22fsStateOptIn%22%3Afalse%7D%7D%7D%2C%22clientMMSOrigin%22%3A%22https%3A%2F%2Fcdn.privacy-mgmt.com%22%2C%22hasCSP%22%3Atrue%2C%22includeData%22%3A%7B%22localState%22%3A%7B%22type%22%3A%22string%22%7D%2C%22actions%22%3A%7B%22type%22%3A%22RecordString%22%7D%2C%22cookies%22%3A%7B%22type%22%3A%22RecordString%22%7D%7D%2C%22propertyHref%22%3A%22https%3A%2F%2Floremipsum.io%22%7D&localState=null&metadata=%7B%22gdpr%22%3A%7B%22applies%22%3Atrue%7D%2C%22usnat%22%3A%7B%22applies%22%3Afalse%7D%7D&nonKeyedLocalState=null&ch=5253431365262314010f705030042836927&scriptVersion=4.40.3&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/mes... https://cdn.privacy-mgmt.com/wrapper/v2/messages?hasCsp=true&env=prod&body=%7B%22accountId%22%3A1638%2C%22campaignEnv%22%3A%22prod%22%2C%22campaigns%22%3A%7B%22gdpr%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22targetingParams%22%3A%7B%22fsStateOptIn%22%3Afalse%7D%7D%2C%22usnat%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22hasLocalData%22%3Afalse%2C%22targetingParams%22%3A%7B%22fsStateOptIn%22%3Afalse%7D%7D%7D%2C%22clientMMSOrigin%22%3A%22https%3A%2F%2Fcdn.privacy-mgmt.com%22%2C%22hasCSP%22%3Atrue%2C%22includeData%22%3A%7B%22localState%22%3A%7B%22type%22%3A%22string%22%7D%2C%22actions%22%3A%7B%22type%22%3A%22RecordString%22%7D%2C%22cookies%22%3A%7B%22type%22%3A%22RecordString%22%7D%7D%2C%22propertyHref%22%3A%22https%3A%2F%2Floremipsum.io%22%7D&localState=null&metadata=%7B%22gdpr%22%3A%7B%22applies%22%3Atrue%7D%2C%22usnat%22%3A%7B%22applies%22%3Afalse%7D%7D&nonKeyedLocalState=null&ch=5253431365262314010f705030042836927&scriptVersion=4.40.3&scriptType=unified — 200 — 20.9 KiB — 139 ms — h2https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=5253431365262314010f705030042836927&scriptVersion=4.40.3&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/pv-... https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=5253431365262314010f705030042836927&scriptVersion=4.40.3&scriptType=unified — 200 — 0 B — 31 ms — h2https://cdn.privacy-mgmt.com/index.html?hasCsp=true&message_id=1470893&consentUUID=null&consent_origin=https%3A%2F%2Fcdn.privacy-mgmt.com%2Fconsent%2Ftcfv2&preload_message=true&version=v1cdn.privacy-mgmt.com/index.html?has... https://cdn.privacy-mgmt.com/index.html?hasCsp=true&message_id=1470893&consentUUID=null&consent_origin=https%3A%2F%2Fcdn.privacy-mgmt.com%2Fconsent%2Ftcfv2&preload_message=true&version=v1 — 200 — 2.4 KiB — 55 ms — h2https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=5253431365262314010f705030042836927&scriptVersion=4.40.3&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/pv-... https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=5253431365262314010f705030042836927&scriptVersion=4.40.3&scriptType=unified — 200 — 816 B — 38 ms — h2https://cdn.privacy-mgmt.com/Notice.1c267.csscdn.privacy-mgmt.com/Notice.1c267.c... https://cdn.privacy-mgmt.com/Notice.1c267.css — 200 — 6.9 KiB — 24 ms — h2https://cdn.privacy-mgmt.com/polyfills.01516.jscdn.privacy-mgmt.com/polyfills.0151... https://cdn.privacy-mgmt.com/polyfills.01516.js — 200 — 2.4 KiB — 24 ms — h2https://cdn.privacy-mgmt.com/Notice.97af9.jscdn.privacy-mgmt.com/Notice.97af9.j... https://cdn.privacy-mgmt.com/Notice.97af9.js — 200 — 92.9 KiB — 49 ms — h2https://cdn.privacy-mgmt.com/consent/tcfv2/vendor-list/categories?siteId=35584cdn.privacy-mgmt.com/consent/tcfv2/... https://cdn.privacy-mgmt.com/consent/tcfv2/vendor-list/categories?siteId=35584 — 200 — 1.3 KiB — 35 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
53% of JavaScript execution is third-party
First-party Third-party 1421ms · 941KB · $19/mo
Google Tag Manager
Tag Manager
Costly
Execution 276ms
Transfer 164 KB
Unused 43%
Monthly Cost $4/mo
a.pub.network
Other
Costly
Execution 234ms
Transfer 192 KB
Unused 81%
Monthly Cost $3/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 213ms
Transfer 212 KB
Unused 77%
Monthly Cost $3/mo
a.pub.network
Other
Costly
Execution 205ms
Transfer 195 KB
Unused 80%
Monthly Cost $3/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 170ms
Transfer 41 KB
Monthly Cost $2/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 117ms
Transfer 34 KB
Monthly Cost $2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 76ms
Transfer 37 KB
Monthly Cost $1/mo
a.pub.network
Other
Optional
Execution 67ms
Transfer 32 KB
Monthly Cost $1/mo
a.pub.network
Other
Optional
Execution 63ms
Transfer 33 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 276ms and costs ~$4/month
  • a.pub.network adds 234ms and costs ~$3/month
  • securepubads.g.doubleclick.net adds 213ms and costs ~$3/month
  • a.pub.network adds 205ms and costs ~$3/month

53% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Google Tag Manager takes 276ms 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

a.pub.network takes 234ms 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

81% of a.pub.network'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

securepubads.g.doubleclick.net takes 213ms 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

77% of securepubads.g.doubleclick.net'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

a.pub.network takes 205ms 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

80% of a.pub.network'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 (2026-08-30 — 2026-09-26)

LCP (p75)

954 ms

94% good

INP (p75)

84 ms

87% good

CLS (p75)

0.040

85% good

FCP (p75)

769 ms

TTFB (p75)

373 ms

This origin passes Core Web Vitals assessment
Image Optimization
9 images, 11 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

9

Total Size

11 KB

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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