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https://fpf.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
59
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.
85
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.

5.29 s

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

12.22 s

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

164 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.

5.69 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.

12.72 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
10 PASS 4 REVIEW 1 FIX
F
Page Weight Budget
Action
2.8 MB transferred, 63 requests
FIX
2.8 MB transferred, 63 requests
Warning::
Page weighs 3.7 MB (2.8 MB transferred)
Warning::
Images are 2.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.0 MB
Info::
Fonts are 457 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 457 KB
Info::
63 HTTP requests
Info::
Estimated 0.60 g CO2 per page load
2.8 MB / 2.4 MB budget
2.8 MB transferred
63 requests
0.60 g CO2 per page load
Images 2.0 MiB 72%
Fonts 457.4 KiB 16%
JavaScript 236.8 KiB 8%
CSS 86.5 KiB 3%
HTML 21.4 KiB 1%
Other 9.0 KiB 0%
Other 2.2 KiB 0%
Other 985 B 0%
0 2.4 MB 4.9 MB
Over budget

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

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Why this matters

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

Source: web.dev font loading

C
Image Optimization
Action
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
https://fpf.org/wp-content/themes/fpf/img/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://fpf.org/wp-content/themes/fpf/img/logo-foo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
22 images 2.0 MB
0 oversized -0 KB
22 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

C
JS Execution Cost
Action
1343ms total JS execution
REVIEW
1343ms total JS execution
Warning::
Unattributable: 390ms CPU time
Warning::
https://fpf.org/wp-content/themes/fpf/js/script.js...: 272ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-T3K...: 243ms CPU time
Info::
https://fpf.org/: 220ms CPU time
Info::
https://ajax.googleapis.com/ajax/libs/jquery/3.4.1...: 93ms CPU time
Warning::
Third-party scripts: 851ms (63% of total)

Main Thread Breakdown

Script Evaluation 35% Other 27% Style & Layout 22% Parse HTML & CSS 8% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable390ms34ms0ms3rd
https://fpf.org/wp-content/themes/fpf/js/script.js?ver=1.0.7272ms20ms1ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-T3KLDF7243ms189ms51ms3rd
https://fpf.org/220ms11ms3ms1st
https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js?ver=3.4.193ms65ms12ms3rd
https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/script.js68ms60ms3ms3rd
https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/banner.js58ms42ms3ms3rd
B
JS Bundles
12 scripts, 66 KB unused
REVIEW
12 scripts, 66 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T3K...: 66 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 66 KB
66 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-T3KLDF7129 KB66 KB (51%)✓3rd
https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/script.js9 KB—✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js?ver=3.4.131 KB—✓3rd
https://fpf.org/wp-content/themes/fpf/assets/js/fpf-facet-labels.js?ver=6.9.41 KB—✓1st
https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.js?ver=6.9.423 KB—✓3rd
https://fpf.org/wp-content/plugins/accordion-blocks/js/accordion-blocks.min.js?ver=1.5.01 KB—✓1st
https://fpf.org/wp-content/themes/fpf/js/script.js?ver=1.0.73 KB—✓1st
https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/banner.js8 KB—✓3rd
https://fpf.org/wp-content/uploads/matomo/matomo.js26 KB—✓1st
blob:https://fpf.org/be41344b-d473-4b9d-ac5f-24742cf88a9b-0 KB—✓3rd

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
Page Weight Inventory
Action
63 resources · 2.8 MB · 66 KB savings available
REVIEW
63 resources · 2.8 MB · 66 KB savings available
Warning::
Page weight 1.8 MB over 1MB target
Got: 2.8 MB Expected: ≤ 1 MB
Info::
~66 KB of savings available
Info::
21 third-party resources (17% of weight)
Info::
3 resources over 200KB
63 resources · 2.8 MiB · 21 third-party 1.8 MiB over 1MB target
Image 72% · 2.1 MiB
Font 16% · 457.4 KiB
JavaScript 8% · 236.8 KiB
CSS 3% · 86.5 KiB
Document 1% · 21.4 KiB
Other 0% · 10.0 KiB

~65.8 KiB of savings available

Remove unused JavaScript: 65.8 KiB
A+
Third-Party Impact
17% third-party, 0 ms blocking
PASS
17% third-party, 0 ms blocking
Info::
Third-party code accounts for 17% of page weight (505.2 KiB of 2.8 MiB)
Info::
Third-party blocking time is low (0 ms)
83%
17%
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+
Font Loading
6 fonts (457 KB)
PASS
6 fonts (457 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

457 KB total

Render-blocking

0

of 6

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 5.3 s LCP 12.2 shttps://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Regular.woffProximaNova-Regular.woff https://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Regular.woff — 51.8 KiB — 55 ms — font-display: swaphttps://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Bold.woffProximaNova-Bold.woff https://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Bold.woff — 51.3 KiB — 54 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-solid-900.woff2 — 153.4 KiB — 30 ms — font-display: swaphttps://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Extrabld.woffProximaNova-Extrabld.woff https://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Extrabld.woff — 51.0 KiB — 55 ms — font-display: swaphttps://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Bold.woff2ProximaNova-Bold.woff2 https://fpf.org/wp-content/themes/fpf/fonts/ProximaNova-Bold.woff2 — 34.2 KiB — 56 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-brands-400.woff2 — 115.8 KiB — 53 ms — font-display: swap
ProximaNova-Regular.woff woff swap
Size 52 KB
Load time 55 ms
Start 373 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ProximaNova-Bold.woff woff swap
Size 51 KB
Load time 54 ms
Start 374 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
fa-solid-900.woff2 woff2 swap
Size 153 KB
Load time 30 ms
Start 375 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
ProximaNova-Extrabld.woff woff swap
Size 51 KB
Load time 55 ms
Start 376 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ProximaNova-Bold.woff2 woff2 swap
Size 34 KB
Load time 56 ms
Start 376 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 53 ms
Start 376 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)

Fixing the unchecked items could save ~181 KB and ~362 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
—
preload
—
dns-prefetch
4
prefetch
—

4 resource hints configured

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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A
HTTP Caching
max-age=604800 (1 week)
PASS
max-age=604800 (1 week)
Info::
Cache-Control header is set
Got: public, max-age=604800
Info::
Effective TTL: 1 week (max-age=604800)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=604800

DirectiveValueMeaning
public—Any cache may store this response
max-age604800Cache for 1 week
Effective TTL: 604800 seconds
Network Waterfall
63 requests over 1326ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.3 s LCP 12.2 shttps://fpf.org// https://fpf.org/ — 200 — 21.4 KiB — 44 ms — h2https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/script.jscdn-cookieyes.com/client_data/f1300... https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/script.js — 200 — 8.7 KiB — 42 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.css?ver=1776851930/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.css?ver=1776851930 — 200 — 3.1 KiB — 51 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.reset.css?ver=1776851930/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.reset.css?ver=1776851930 — 200 — 729 B — 36 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.system.css?ver=1776851930/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.system.css?ver=1776851930 — 200 — 1.1 KiB — 26 ms — h2https://fpf.org/wp-content/plugins/accordion-blocks/build/index.css?ver=1.5.0/wp-content/plugins/accordion-block... https://fpf.org/wp-content/plugins/accordion-blocks/build/index.css?ver=1.5.0 — 200 — 977 B — 34 ms — h2https://use.typekit.net/kxf6fpd.css?ver=6.9.4use.typekit.net/kxf6fpd.css?ver=6.9... https://use.typekit.net/kxf6fpd.css?ver=6.9.4 — 200 — 1.2 KiB — 190 ms — h2https://fpf.org/wp-content/themes/fpf/css/addition/addition.css?ver=1.0.2/wp-content/themes/fpf/css/addition... https://fpf.org/wp-content/themes/fpf/css/addition/addition.css?ver=1.0.2 — 200 — 24.4 KiB — 49 ms — h2https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.csscdn.jsdelivr.net/gh/fancyapps/fancy... https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.css — 200 — 3.7 KiB — 43 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css — 200 — 19.2 KiB — 49 ms — h3https://fpf.org/wp-content/themes/fpf/css/style.css?ver=6.3.6/wp-content/themes/fpf/css/style.cs... https://fpf.org/wp-content/themes/fpf/css/style.css?ver=6.3.6 — 200 — 19.5 KiB — 42 ms — h2https://fpf.org/wp-content/themes/fpf/style.css?ver=1.8.5/wp-content/themes/fpf/style.css?ve... https://fpf.org/wp-content/themes/fpf/style.css?ver=1.8.5 — 200 — 1.4 KiB — 27 ms — h2https://fpf.org/wp-content/themes/fpf/css/ai-landing-page.css?ver=1.0.0/wp-content/themes/fpf/css/ai-landi... https://fpf.org/wp-content/themes/fpf/css/ai-landing-page.css?ver=1.0.0 — 200 — 4.7 KiB — 23 ms — h2https://fpf.org/wp-content/plugins/tablepress/css/build/default.css?ver=3.2.8/wp-content/plugins/tablepress/css/... https://fpf.org/wp-content/plugins/tablepress/css/build/default.css?ver=3.2.8 — 200 — 2.4 KiB — 27 ms — h2https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js?ver=3.4.1ajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js?ver=3.4.1 — 200 — 30.7 KiB — 71 ms — h2https://fpf.org/wp-content/themes/fpf/assets/js/fpf-facet-labels.js?ver=6.9.4/wp-content/themes/fpf/assets/js/fp... https://fpf.org/wp-content/themes/fpf/assets/js/fpf-facet-labels.js?ver=6.9.4 — 200 — 815 B — 23 ms — h2https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.js?ver=6.9.4cdn.jsdelivr.net/gh/fancyapps/fancy... https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.js?ver=6.9.4 — 200 — 23.4 KiB — 45 ms — h2https://fpf.org/wp-content/themes/fpf/img/logo.svg/wp-content/themes/fpf/img/logo.svg https://fpf.org/wp-content/themes/fpf/img/logo.svg — 200 — 3.4 KiB — 27 ms — h2https://fpf.org/wp-content/uploads/2025/12/FPF-DC-Privacy-Forum-Web-Header-2880x1500-1-scaled-1-150x150.jpg/wp-content/uploads/2025/12/FPF-DC-... https://fpf.org/wp-content/uploads/2025/12/FPF-DC-Privacy-Forum-Web-Header-2880x1500-1-scaled-1-150x150.jpg — 200 — 6.6 KiB — 39 ms — h2https://fpf.org/wp-content/uploads/2026/03/shutterstock_2513125201-scaled-e1774550471531-300x300.jpg/wp-content/uploads/2026/03/shutter... https://fpf.org/wp-content/uploads/2026/03/shutterstock_2513125201-scaled-e1774550471531-300x300.jpg — 200 — 14.9 KiB — 21 ms — h2https://fpf.org/wp-content/uploads/2024/05/EmailImage-150x150.jpg/wp-content/uploads/2024/05/EmailIm... https://fpf.org/wp-content/uploads/2024/05/EmailImage-150x150.jpg — 200 — 4.2 KiB — 18 ms — h2https://log.cookieyes.com/api/v1/loglog.cookieyes.com/api/v1/log https://log.cookieyes.com/api/v1/log — 200 — 260 B — 203 ms — h3https://fpf.org/wp-content/themes/fpf/css/pen-styles.css/wp-content/themes/fpf/css/pen-styl... https://fpf.org/wp-content/themes/fpf/css/pen-styles.css — 200 — 2.5 KiB — 12 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/fpf-button/block.css/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/fpf-button/block.css — 200 — 1.5 KiB — 13 ms — h2https://fpf.org/wp-content/themes/fpf/img/logo-footer.svg/wp-content/themes/fpf/img/logo-foo... https://fpf.org/wp-content/themes/fpf/img/logo-footer.svg — 200 — 3.4 KiB — 12 ms — h2https://fpf.org/wp-content/plugins/accordion-blocks/js/accordion-blocks.min.js?ver=1.5.0/wp-content/plugins/accordion-block... https://fpf.org/wp-content/plugins/accordion-blocks/js/accordion-blocks.min.js?ver=1.5.0 — 200 — 1.5 KiB — 14 ms — h2https://fpf.org/wp-content/themes/fpf/js/script.js?ver=1.0.7/wp-content/themes/fpf/js/script.js... https://fpf.org/wp-content/themes/fpf/js/script.js?ver=1.0.7 — 200 — 3.1 KiB — 12 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-T3KLDF7www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-T3KLDF7 — 200 — 128.6 KiB — 262 ms — h2https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/banner.jscdn-cookieyes.com/client_data/f1300... https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/banner.js — 200 — 7.6 KiB — 13 ms — h2https://p.typekit.net/p.css?s=1&k=kxf6fpd&ht=tk&f=139.140.169.170.173.174.175.176.25136.25137&a=86756031&app=typekit&e=cssp.typekit.net/p.css?s=1&k=kxf6fpd&h... https://p.typekit.net/p.css?s=1&k=kxf6fpd&ht=tk&f=139.140.169.170.173.174.175.176.25136.25137&a=86756031&app=typekit&e=css — 200 — 172 B — 13 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.3 s LCP 12.2 shttps://fpf.org// https://fpf.org/ — 200 — 21.4 KiB — 44 ms — h2https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/script.jscdn-cookieyes.com/client_data/f1300... https://cdn-cookieyes.com/client_data/f130066eff26df77ca6c4fe2/script.js — 200 — 8.7 KiB — 42 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.css?ver=1776851930/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.css?ver=1776851930 — 200 — 3.1 KiB — 51 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.reset.css?ver=1776851930/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.reset.css?ver=1776851930 — 200 — 729 B — 36 ms — h2https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.system.css?ver=1776851930/wp-content/themes/fpf/page-blocks/... https://fpf.org/wp-content/themes/fpf/page-blocks/page-blocks.system.css?ver=1776851930 — 200 — 1.1 KiB — 26 ms — h2https://fpf.org/wp-content/plugins/accordion-blocks/build/index.css?ver=1.5.0/wp-content/plugins/accordion-block... https://fpf.org/wp-content/plugins/accordion-blocks/build/index.css?ver=1.5.0 — 200 — 977 B — 34 ms — h2https://use.typekit.net/kxf6fpd.css?ver=6.9.4use.typekit.net/kxf6fpd.css?ver=6.9... https://use.typekit.net/kxf6fpd.css?ver=6.9.4 — 200 — 1.2 KiB — 190 ms — h2https://fpf.org/wp-content/themes/fpf/css/addition/addition.css?ver=1.0.2/wp-content/themes/fpf/css/addition... https://fpf.org/wp-content/themes/fpf/css/addition/addition.css?ver=1.0.2 — 200 — 24.4 KiB — 49 ms — h2https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.csscdn.jsdelivr.net/gh/fancyapps/fancy... https://cdn.jsdelivr.net/gh/fancyapps/fancybox@3.5.7/dist/jquery.fancybox.min.css — 200 — 3.7 KiB — 43 ms — 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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
63% of JavaScript execution is third-party
First-party Third-party 851ms · 176KB · €14/mo
Unattributable
Other
Costly
Execution 390ms
Transfer 0 KB
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 243ms
Transfer 129 KB
Unused 51%
Monthly Cost €4/mo
ajax.googleapis.com
Other
Optional
Execution 93ms
Transfer 31 KB
Monthly Cost €1/mo
cdn-cookieyes.com
Other
Optional
Execution 68ms
Transfer 9 KB
Monthly Cost €1/mo
cdn-cookieyes.com
Other
Optional
Execution 58ms
Transfer 8 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 390ms and costs ~€6/month
  • Google Tag Manager adds 243ms and costs ~€4/month

63% 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

Unattributable takes 390ms 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

Google Tag Manager takes 243ms 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

51% 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.

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