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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
GRADE
D
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

973 ms

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

2.48 s

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

139 ms

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

0.934

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

1.61 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.

4.25 s

Page Load Progression

518 ms
1.0 s
1.6 s
2.1 s
2.6 s
3.1 s
3.6 s
4.1 s
Checks
15
6 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
7.0 MB transferred, 77 requests
FIX
7.0 MB transferred, 77 requests
Critical::
Page weighs 11.7 MB (7.0 MB transferred)
Warning::
Images are 4.6 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.6 MB
Warning::
JavaScript is 1.4 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.4 MB
Info::
Fonts are 798 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 798 KB
Info::
77 HTTP requests
Info::
Estimated 1.5 g CO2 per page load
7.0 MB / 2.4 MB budget
7.0 MB transferred
77 requests
1.5 g CO2 per page load
Images 4.6 MiB 66%
JavaScript 1.4 MiB 20%
Fonts 798.2 KiB 11%
CSS 163.4 KiB 2%
HTML 61.9 KiB 1%
Other 2.4 KiB 0%
Other 2.3 KiB 0%
Other 862 B 0%
Other 553 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

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
Third-Party Impact
Action
79% third-party, 0 ms blocking
FIX
79% third-party, 0 ms blocking
Warning::
Third-party code accounts for 79% of page weight (5.5 MiB of 7.0 MiB)
Info::
Third-party blocking time is low (0 ms)
21%
79%
First-party Third-party
D
JS Execution Cost
Action
2035ms total JS execution
FIX
2035ms total JS execution
Warning::
https://nato.int/en: 706ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 389ms CPU time
Warning::
Unattributable: 293ms CPU time
Warning::
https://nato.int/etc.clientlibs/nato/clientlibs/cl...: 256ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-P3XL...: 167ms CPU time
Warning::
Third-party scripts: 1074ms (53% of total)

Main Thread Breakdown

Script Evaluation 45% Other 28% Style & Layout 13% Script Parsing & Compilation 7% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://nato.int/en706ms17ms3ms1st
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js389ms342ms37ms3rd
Unattributable293ms4ms0ms3rd
https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site.lc-e9634b8cae20cb0b095ac4d7618e1ee6-lc.min.js256ms190ms21ms1st
https://www.googletagmanager.com/gtag/js?id=G-P3XLQYS1M1&cx=c&gtm=4e64h1167ms141ms25ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PM2JH48Z103ms87ms15ms3rd
https://connect.facebook.net/signals/config/1329839397061378?v=2.9.303&r=stable&domain=nato.int&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C16864ms54ms8ms3rd
https://connect.facebook.net/en_US/fbevents.js58ms42ms16ms3rd
F
JS Bundles
Action
22 scripts, 799 KB unused
FIX
22 scripts, 799 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://nato.int/etc.clientlibs/nato/clientlibs/cl...: 100 KB unused (78%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-P3XL...: 62 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 799 KB
799 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site.lc-e9634b8cae20cb0b095ac4d7618e1ee6-lc.min.js128 KB100 KB (78%)✓1st
https://www.googletagmanager.com/gtag/js?id=G-P3XLQYS1M1&cx=c&gtm=4e64h1158 KB62 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PM2JH48Z124 KB45 KB (48%)✓3rd
https://connect.facebook.net/en_US/fbevents.js97 KB34 KB (35%)✓3rd
https://nato.int/etc.clientlibs/nato/clientlibs/vendor/swiper.lc-1f465962ec28639e589f66c0738a3454-lc.min.js44 KB28 KB (65%)✓1st
https://s7g10.scene7.com/s7viewers/html5/js/SmartCropVideoViewer.js9 KB—✓3rd
https://nato.int/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js1 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
77 resources · 7.0 MB · 799 KB savings available
FIX
77 resources · 7.0 MB · 799 KB savings available
Warning::
Page weight 6.0 MB over 1MB target
Got: 7.0 MB Expected: ≤ 1 MB
Info::
~799 KB of savings available
Warning::
48 third-party resources (79% of weight)
Info::
12 resources over 200KB
77 resources · 7.0 MiB · 48 third-party 6.0 MiB over 1MB target
Image 66% · 4.6 MiB
JavaScript 20% · 1.4 MiB
Font 11% · 798.2 KiB
CSS 2% · 163.4 KiB
Document 1% · 64.7 KiB
Other 0% · 1.5 KiB

~799.4 KiB of savings available

Remove unused JavaScript: 799.4 KiB
C
Image Optimization
Action
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
https://s7g10.scene7.com/is/image/ncia/20260418-ds... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7g10.scene7.com/is/image/ncia/20260416_tr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s7g10.scene7.com/is/image/ncia/20250325_32... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32 images 4.6 MB
0 oversized -0 KB
7 legacy format
3 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

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

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+
Font Loading
7 fonts (798 KB)
PASS
7 fonts (798 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

798 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 973 ms LCP 2.5 shttps://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/SourceSansPro-Regular.woff2SourceSansPro-Regular.w... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/SourceSansPro-Regular.woff2 — 77.1 KiB — 75 ms — font-display: swaphttps://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/material-icons/icomoon.wofficomoon.woff https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/material-icons/icomoon.woff — 23.4 KiB — 86 ms — font-display: swaphttps://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/SourceSansPro-Bold.woff2SourceSansPro-Bold.woff2 https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/SourceSansPro-Bold.woff2 — 76.3 KiB — 79 ms — font-display: swaphttps://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/NotoSansCondensed-Medium.woff2NotoSansCondensed-Mediu... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/NotoSansCondensed-Medium.woff2 — 199.7 KiB — 104 ms — font-display: swaphttps://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/NotoSans-Regular.woff2NotoSans-Regular.woff2 https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/NotoSans-Regular.woff2 — 190.4 KiB — 80 ms — font-display: swaphttps://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/NotoSans-SemiBold.woff2NotoSans-SemiBold.woff2 https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/fonts/all-fonts/NotoSans-SemiBold.woff2 — 197.4 KiB — 22 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 35 ms — font-display: swap
SourceSansPro-Regular.w... woff2 swap
Size 77 KB
Load time 75 ms
Start 319 ms
Risk FOUT — text flashes from fallback to web font
icomoon.woff woff swap
Size 23 KB
Load time 86 ms
Start 319 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
SourceSansPro-Bold.woff2 woff2 swap
Size 76 KB
Load time 79 ms
Start 320 ms
Risk FOUT — text flashes from fallback to web font
NotoSansCondensed-Mediu... woff2 swap
Size 200 KB
Load time 104 ms
Start 320 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
NotoSans-Regular.woff2 woff2 swap
Size 190 KB
Load time 80 ms
Start 321 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
NotoSans-SemiBold.woff2 woff2 swap
Size 197 KB
Load time 22 ms
Start 682 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
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 35 ms
Start 1.7 s
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)

Fixing the unchecked items could save ~301 KB and ~602 ms

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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=300

DirectiveValueMeaning
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
77 requests over 1993ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 973 ms LCP 2.5 shttps://nato.int// https://nato.int/ — 301 — 585 B — 16 ms — h2https://nato.int/en/en https://nato.int/en — 200 — 34.2 KiB — 9 ms — h2https://nato.int/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js/.rum/@adobe/helix-rum-js@%5E2/dist... https://nato.int/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js — 200 — 1014 B — 46 ms — h2https://use.typekit.net/lpb2knn.cssuse.typekit.net/lpb2knn.css https://use.typekit.net/lpb2knn.css — 200 — 1.5 KiB — 50 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-base.lc-6a501ee78c7b37c07ddd59fab8ef09bc-lc.min.css/etc.clientlibs/nato/clientlibs/cli... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-base.lc-6a501ee78c7b37c07ddd59fab8ef09bc-lc.min.css — 200 — 6.1 KiB — 35 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css/etc.clientlibs/nato/clientlibs/cli... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.css — 200 — 159 B — 31 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site.lc-27944d6e134b34cd517c559d7ef4fda2-lc.min.css/etc.clientlibs/nato/clientlibs/cli... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site.lc-27944d6e134b34cd517c559d7ef4fda2-lc.min.css — 200 — 108.6 KiB — 50 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/vendor/jquery.lc-76a92234952929ebefaa60dd43afeddb-lc.min.js/etc.clientlibs/nato/clientlibs/ven... https://nato.int/etc.clientlibs/nato/clientlibs/vendor/jquery.lc-76a92234952929ebefaa60dd43afeddb-lc.min.js — 200 — 31.8 KiB — 44 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js/etc.clientlibs/nato/clientlibs/cli... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-dependencies.lc-d41d8cd98f00b204e9800998ecf8427e-lc.min.js — 200 — 518 B — 14 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-richtextmodal.lc-0c09b15b8c81acd54d14650f69999a5f-lc.min.js/etc.clientlibs/nato/clientlibs/cli... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-richtextmodal.lc-0c09b15b8c81acd54d14650f69999a5f-lc.min.js — 200 — 604 B — 26 ms — h2https://s7g10.scene7.com/is/image/ncia/20260325_sgar-report-2025_0031:16x9?fmt=webp-alpha&qlt=80s7g10.scene7.com/is/image/ncia/2026... https://s7g10.scene7.com/is/image/ncia/20260325_sgar-report-2025_0031:16x9?fmt=webp-alpha&qlt=80 — 200 — 206.0 KiB — 73 ms — h2https://s7g10.scene7.com/is/image/ncia/240307-coll-def:16x9?fmt=webp-alpha&qlt=80s7g10.scene7.com/is/image/ncia/2403... https://s7g10.scene7.com/is/image/ncia/240307-coll-def:16x9?fmt=webp-alpha&qlt=80 — 200 — 155.7 KiB — 79 ms — 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h3https://www.gstatic.com/recaptcha/api2/logo_48.pngwww.gstatic.com/recaptcha/api2/logo... https://www.gstatic.com/recaptcha/api2/logo_48.png — 200 — 2.3 KiB — 16 ms — h2https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 33.9 KiB — 35 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 0 B — 22 ms — h2https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/images/favicons/favicon-32.png/etc.clientlibs/nato/clientlibs/cli... https://nato.int/etc.clientlibs/nato/clientlibs/clientlib-site/resources/images/favicons/favicon-32.png — 200 — 1.7 KiB — 6 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 1074ms · 423KB · €12/mo
www.gstatic.com
Other
Costly
Execution 389ms
Transfer 0 KB
Unused 49%
Monthly Cost €4/mo
Unattributable
Other
Costly
Execution 293ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 167ms
Transfer 158 KB
Unused 39%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 103ms
Transfer 124 KB
Unused 48%
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 64ms
Transfer 44 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 58ms
Transfer 97 KB
Unused 35%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.gstatic.com adds 389ms and costs ~€4/month
  • Unattributable adds 293ms 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

www.gstatic.com takes 389ms 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

Unattributable takes 293ms 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

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.

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