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https://internationalwomensday.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
2
REVIEW
6
PASS
5
INFO
2

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

Mobile Desktop
73
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
74
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

809 ms

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

1.90 s

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

10 ms

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

0.369

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

809 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.19 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
15
5 PASS 6 REVIEW 2 FIX
D
Third-Party Impact
Action
99% third-party, 0 ms blocking
FIX
99% third-party, 0 ms blocking
Warning::
Third-party code accounts for 99% of page weight (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
99%
First-party Third-party
D
Page Weight Inventory
Action
46 resources · 1.8 MB · 88 KB savings available
FIX
46 resources · 1.8 MB · 88 KB savings available
Warning::
Page weight 859 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~88 KB of savings available
Warning::
40 third-party resources (99% of weight)
46 resources · 1.8 MiB · 40 third-party 859.3 KiB over 1MB target
Image 73% · 1.3 MiB
JavaScript 12% · 233.8 KiB
Font 7% · 136.3 KiB
CSS 7% · 129.3 KiB
Document 1% · 9.6 KiB
Other 0% · 1.1 KiB

~87.6 KiB of savings available

Remove unused JavaScript: 87.6 KiB
C
Page Weight Budget
Action
1.8 MB transferred, 46 requests
REVIEW
1.8 MB transferred, 46 requests
Info::
Page weighs 3.1 MB (1.8 MB transferred)
Warning::
Images are 1.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.3 MB
Info::
46 HTTP requests
Info::
Estimated 0.39 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
46 requests
0.39 g CO2 per page load
Images 1.3 MiB 73%
JavaScript 233.8 KiB 12%
Fonts 136.3 KiB 7%
Other 77.7 KiB 4%
CSS 52.2 KiB 3%
HTML 9.6 KiB 1%
Other 1.2 KiB 0%
Other 556 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Warning::
https://internationalwomensday.s3.us-west-2.amazon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s3-us-west-2.amazonaws.com/internationalwo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://internationalwomensday.s3.us-west-2.amazon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://internationalwomensday.s3.us-west-2.amazon... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
20 images 1.3 MB
0 oversized -0 KB
20 legacy format
4 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

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

B
JS Execution Cost
527ms total JS execution
REVIEW
527ms total JS execution
Info::
https://internationalwomensday.com/: 228ms CPU time
Info::
Unattributable: 177ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-RK6B...: 122ms CPU time
Warning::
Third-party scripts: 299ms (57% of total)

Main Thread Breakdown

Other 39% Script Evaluation 27% Style & Layout 23% Rendering 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://internationalwomensday.com/228ms4ms1ms1st
Unattributable177ms19ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-RK6BWK4T9R122ms107ms14ms3rd
B
JS Bundles
5 scripts, 88 KB unused
REVIEW
5 scripts, 88 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-RK6B...: 66 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://code.jquery.com/jquery-3.6.0.min.js: 21 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 88 KB
88 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-RK6BWK4T9R170 KB66 KB (39%)✓3rd
https://code.jquery.com/jquery-3.6.0.min.js31 KB21 KB (70%)✓3rd
https://internationalwomensday.com/js/flipdown.js4 KB—✓1st
https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js24 KB—✓3rd
https://kit.fontawesome.com/3b9f286cf2.js6 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

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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

Green Hosting

No green hosting detected

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
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 (136 KB)
PASS
6 fonts (136 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

136 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 500 ms 1.0 s 1.5 s FCP 809 ms LCP 1.9 shttps://fonts.gstatic.com/s/librefranklin/v20/jizOREVItHgc8qDIbSTKq4XkRg8T88bjFuXOnduhrsKkANDJTedX18mE.woff2jizOREVItHgc8qDIbSTKq4X... https://fonts.gstatic.com/s/librefranklin/v20/jizOREVItHgc8qDIbSTKq4XkRg8T88bjFuXOnduhrsKkANDJTedX18mE.woff2 — 15.7 KiB — 15 ms — font-display: swaphttps://fonts.gstatic.com/s/quicksand/v37/6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkP8o58a-wjwxUD2GFw.woff26xK-dSZaM9iE8KbpRA_LJ3z... https://fonts.gstatic.com/s/quicksand/v37/6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkP8o58a-wjwxUD2GFw.woff2 — 15.5 KiB — 19 ms — font-display: swaphttps://fonts.gstatic.com/s/courgette/v19/wEO_EBrAnc9BLjLQAUk1VvoK_kgXiQ.woff2wEO_EBrAnc9BLjLQAUk1Vvo... https://fonts.gstatic.com/s/courgette/v19/wEO_EBrAnc9BLjLQAUk1VvoK_kgXiQ.woff2 — 17.9 KiB — 17 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-brands-400-0.woff2pro-fa-brands-400-0.woff2 https://ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-brands-400-0.woff2 — 37.4 KiB — 39 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-solid-900-0.woff2pro-fa-solid-900-0.woff2 https://ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-solid-900-0.woff2 — 9.1 KiB — 27 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-brands-400-2.woff2pro-fa-brands-400-2.woff2 https://ka-p.fontawesome.com/releases/v7.2.0/webfonts/pro-fa-brands-400-2.woff2 — 40.7 KiB — 25 ms — font-display: swap
jizOREVItHgc8qDIbSTKq4X... woff2 swap
Size 16 KB
Load time 15 ms
Start 283 ms
Risk FOUT — text flashes from fallback to web font
6xK-dSZaM9iE8KbpRA_LJ3z... woff2 swap
Size 16 KB
Load time 19 ms
Start 284 ms
Risk FOUT — text flashes from fallback to web font
wEO_EBrAnc9BLjLQAUk1Vvo... woff2 swap
Size 18 KB
Load time 17 ms
Start 284 ms
Risk FOUT — text flashes from fallback to web font
pro-fa-brands-400-0.woff2 woff2 swap
Size 37 KB
Load time 39 ms
Start 536 ms
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-0.woff2 woff2 swap
Size 9 KB
Load time 27 ms
Start 540 ms
Risk FOUT — text flashes from fallback to web font
pro-fa-brands-400-2.woff2 woff2 swap
Size 41 KB
Load time 25 ms
Start 540 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
46 requests over 742ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 809 ms LCP 1.9 shttps://internationalwomensday.com// https://internationalwomensday.com/ — 200 — 9.6 KiB — 76 ms — h2https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.csscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css — 200 — 33.2 KiB — 70 ms — h2https://internationalwomensday.com/css/bootstrap-theme.css?07062024/css/bootstrap-theme.css?07062024 https://internationalwomensday.com/css/bootstrap-theme.css?07062024 — 200 — 1.7 KiB — 25 ms — h2https://code.jquery.com/jquery-3.6.0.min.jscode.jquery.com/jquery-3.6.0.min.js https://code.jquery.com/jquery-3.6.0.min.js — 200 — 30.5 KiB — 39 ms — h2https://fonts.googleapis.com/css2?family=Courgette&family=Libre+Franklin:wght@800&family=Quicksand&display=swapfonts.googleapis.com/css2?family=Co... https://fonts.googleapis.com/css2?family=Courgette&family=Libre+Franklin:wght@800&family=Quicksand&display=swap — 200 — 1.2 KiB — 97 ms — h2https://internationalwomensday.com/js/flipdown.js/js/flipdown.js https://internationalwomensday.com/js/flipdown.js — 200 — 3.7 KiB — 35 ms — h2https://internationalwomensday.com/css/flipdown.css/css/flipdown.css https://internationalwomensday.com/css/flipdown.css — 200 — 1.5 KiB — 30 ms — h2https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.csscdnjs.cloudflare.com/ajax/libs/anim... https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css — 200 — 4.1 KiB — 42 ms — h3https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDaylogo.pngs3-us-west-2.amazonaws.com/internat... https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDaylogo.png — 200 — 4.4 KiB — 117 ms — http/1.1https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDay-logoIWD.pngs3-us-west-2.amazonaws.com/internat... https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDay-logoIWD.png — 200 — 18.4 KiB — 111 ms — http/1.1https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.css — 200 — 10.5 KiB — 31 ms — h2https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-A.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-A.jpg — 200 — 129.5 KiB — 162 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-115years.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-115years.jpg — 200 — 171.2 KiB — 175 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD2026-GiveToGain-theme-home-pic.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD2026-GiveToGain-theme-home-pic.jpg — 200 — 71.3 KiB — 145 ms — http/1.1https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.jscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js — 200 — 24.3 KiB — 23 ms — h2https://kit.fontawesome.com/3b9f286cf2.jskit.fontawesome.com/3b9f286cf2.js https://kit.fontawesome.com/3b9f286cf2.js — 200 — 5.6 KiB — 77 ms — h2https://www.googletagmanager.com/gtag/js?id=G-RK6BWK4T9Rwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-RK6BWK4T9R — 200 — 169.7 KiB — 131 ms — h2https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-Giving-homepic.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-Giving-homepic.jpg — 200 — 116.1 KiB — 172 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/2023/IWD-theme-homepic-6.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/2023/IWD-theme-homepic-6.jpg — 200 — 78.4 KiB — 158 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/2023/IWD-theme-homepic-5.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/2023/IWD-theme-homepic-5.jpg — 200 — 77.8 KiB — 157 ms — http/1.1https://internationalwomensday.s3-us-west-2.amazonaws.com/images/IWD-115-Years-celebration.jpginternationalwomensday.s3-us-west-2... https://internationalwomensday.s3-us-west-2.amazonaws.com/images/IWD-115-Years-celebration.jpg — 200 — 80.8 KiB — 210 ms — http/1.1https://internationalwomensday.s3-us-west-2.amazonaws.com/images/2026-theme-hero-thumb.jpginternationalwomensday.s3-us-west-2... https://internationalwomensday.s3-us-west-2.amazonaws.com/images/2026-theme-hero-thumb.jpg — 200 — 40.4 KiB — 160 ms — http/1.1https://internationalwomensday.s3-us-west-2.amazonaws.com/images/IWDplanning-toolkit-free2.jpginternationalwomensday.s3-us-west-2... https://internationalwomensday.s3-us-west-2.amazonaws.com/images/IWDplanning-toolkit-free2.jpg — 200 — 60.1 KiB — 125 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWDfundraisingevents.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWDfundraisingevents.jpg — 200 — 47.7 KiB — 133 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/heart-IWD-giving2.pnginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/heart-IWD-giving2.png — 200 — 7.9 KiB — 162 ms — http/1.1https://fonts.gstatic.com/s/librefranklin/v20/jizOREVItHgc8qDIbSTKq4XkRg8T88bjFuXOnduhrsKkANDJTedX18mE.woff2fonts.gstatic.com/s/librefranklin/v... https://fonts.gstatic.com/s/librefranklin/v20/jizOREVItHgc8qDIbSTKq4XkRg8T88bjFuXOnduhrsKkANDJTedX18mE.woff2 — 200 — 15.7 KiB — 15 ms — h3https://fonts.gstatic.com/s/quicksand/v37/6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkP8o58a-wjwxUD2GFw.woff2fonts.gstatic.com/s/quicksand/v37/6... https://fonts.gstatic.com/s/quicksand/v37/6xK-dSZaM9iE8KbpRA_LJ3z8mH9BOJvgkP8o58a-wjwxUD2GFw.woff2 — 200 — 15.5 KiB — 19 ms — h3https://fonts.gstatic.com/s/courgette/v19/wEO_EBrAnc9BLjLQAUk1VvoK_kgXiQ.woff2fonts.gstatic.com/s/courgette/v19/w... https://fonts.gstatic.com/s/courgette/v19/wEO_EBrAnc9BLjLQAUk1VvoK_kgXiQ.woff2 — 200 — 17.9 KiB — 17 ms — h3https://ka-p.fontawesome.com/releases/v7.2.0/css/pro.min.css?token=3b9f286cf2ka-p.fontawesome.com/releases/v7.2.... https://ka-p.fontawesome.com/releases/v7.2.0/css/pro.min.css?token=3b9f286cf2 — 200 — 64.5 KiB — 84 ms — h2https://ka-p.fontawesome.com/releases/v7.2.0/css/pro-v4-shims.min.css?token=3b9f286cf2ka-p.fontawesome.com/releases/v7.2.... https://ka-p.fontawesome.com/releases/v7.2.0/css/pro-v4-shims.min.css?token=3b9f286cf2 — 200 — 4.1 KiB — 71 ms — h2
0 ms 500 ms 1.0 s 1.5 s FCP 809 ms LCP 1.9 shttps://internationalwomensday.com// https://internationalwomensday.com/ — 200 — 9.6 KiB — 76 ms — h2https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.csscdn.jsdelivr.net/npm/bootstrap@5.3.... https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css — 200 — 33.2 KiB — 70 ms — h2https://internationalwomensday.com/css/bootstrap-theme.css?07062024/css/bootstrap-theme.css?07062024 https://internationalwomensday.com/css/bootstrap-theme.css?07062024 — 200 — 1.7 KiB — 25 ms — h2https://code.jquery.com/jquery-3.6.0.min.jscode.jquery.com/jquery-3.6.0.min.js https://code.jquery.com/jquery-3.6.0.min.js — 200 — 30.5 KiB — 39 ms — h2https://fonts.googleapis.com/css2?family=Courgette&family=Libre+Franklin:wght@800&family=Quicksand&display=swapfonts.googleapis.com/css2?family=Co... https://fonts.googleapis.com/css2?family=Courgette&family=Libre+Franklin:wght@800&family=Quicksand&display=swap — 200 — 1.2 KiB — 97 ms — h2https://internationalwomensday.com/js/flipdown.js/js/flipdown.js https://internationalwomensday.com/js/flipdown.js — 200 — 3.7 KiB — 35 ms — h2https://internationalwomensday.com/css/flipdown.css/css/flipdown.css https://internationalwomensday.com/css/flipdown.css — 200 — 1.5 KiB — 30 ms — h2https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.csscdnjs.cloudflare.com/ajax/libs/anim... https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css — 200 — 4.1 KiB — 42 ms — h3https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDaylogo.pngs3-us-west-2.amazonaws.com/internat... https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDaylogo.png — 200 — 4.4 KiB — 117 ms — http/1.1https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDay-logoIWD.pngs3-us-west-2.amazonaws.com/internat... https://s3-us-west-2.amazonaws.com/internationalwomensday/home/InternationalWomensDay-logoIWD.png — 200 — 18.4 KiB — 111 ms — http/1.1https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.csscdn.jsdelivr.net/npm/bootstrap-icon... https://cdn.jsdelivr.net/npm/bootstrap-icons@1.7.2/font/bootstrap-icons.css — 200 — 10.5 KiB — 31 ms — h2https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-A.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-A.jpg — 200 — 129.5 KiB — 162 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-115years.jpginternationalwomensday.s3.us-west-2... https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD-theme-homepic-115years.jpg — 200 — 171.2 KiB — 175 ms — http/1.1https://internationalwomensday.s3.us-west-2.amazonaws.com/images/IWD2026-GiveToGain-theme-home-pic.jpginternationalwomensday.s3.us-west-2... 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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
57% of JavaScript execution is third-party
First-party Third-party 299ms · 170KB · €3/mo
Unattributable
Other
Optional
Execution 177ms
Transfer 0 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 122ms
Transfer 170 KB
Unused 39%
Monthly Cost €1/mo

57% 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

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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