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https://theconversation.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
82
GRADE
B
FIX
2
REVIEW
5
PASS
8
INFO
2

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

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

2.14 s

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

5.00 s

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

1.57 s

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.

2.14 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.

9.05 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
8 PASS 5 REVIEW 2 FIX
D
Third-Party Impact
Action
91% third-party, 0 ms blocking
FIX
91% third-party, 0 ms blocking
Warning::
Third-party code accounts for 91% of page weight (1.2 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
91%
First-party Third-party
F
JS Execution Cost
Action
4682ms total JS execution
FIX
4682ms total JS execution
Warning::
https://theconversation.com/us: 1441ms CPU time
Warning::
Unattributable: 1092ms CPU time
Warning::
https://cdn.theconversation.com/_next/static/chunk...: 840ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WX8...: 405ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-3GXW...: 377ms CPU time
Warning::
Third-party scripts: 3241ms (69% of total)

Main Thread Breakdown

Script Evaluation 42% Other 26% Style & Layout 20% Script Parsing & Compilation 5% Parse HTML & CSS 3% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://theconversation.com/us1441ms116ms1ms1st
Unattributable1092ms21ms0ms3rd
https://cdn.theconversation.com/_next/static/chunks/framework-0351939e9b0fda1b.js840ms760ms32ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WX8PHK9405ms304ms53ms3rd
https://www.googletagmanager.com/gtag/js?id=G-3GXW6PB79X&cx=c&gtm=4e64h1377ms304ms64ms3rd
https://cdn.theconversation.com/_next/static/chunks/pages/_app-a23562af1b6490e4.js306ms247ms31ms3rd
https://cdn.theconversation.com/_next/static/chunks/main-4f97b6b08b924568.js127ms111ms15ms3rd
https://cdn.theconversation.com/_next/static/chunks/pages/view-4f2621c5c493b11f.js94ms91ms1ms3rd
B
Page Weight Budget
1.3 MB transferred, 122 requests
REVIEW
1.3 MB transferred, 122 requests
Info::
Page weighs 3.5 MB (1.3 MB transferred)
Warning::
JavaScript is 529 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 529 KB
Warning::
122 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.26 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
122 requests
0.26 g CO2 per page load
JavaScript 529.2 KiB 41%
Images 330.7 KiB 26%
Other 259.5 KiB 20%
HTML 93.4 KiB 7%
Fonts 54.4 KiB 4%
CSS 11.8 KiB 1%
Other 11.0 KiB 1%
Other 752 B 0%
Other 560 B 0%
Other 131 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

C
JS Bundles
Action
21 scripts, 201 KB unused
REVIEW
21 scripts, 201 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-3GXW...: 67 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WX8...: 59 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.theconversation.com/_next/static/chunk...: 54 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.theconversation.com/_next/static/chunk...: 20 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 201 KB
201 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-3GXW6PB79X&cx=c&gtm=4e64h1171 KB67 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WX8PHK9133 KB59 KB (44%)✓3rd
https://cdn.theconversation.com/_next/static/chunks/pages/_app-a23562af1b6490e4.js82 KB54 KB (67%)✓3rd
https://cdn.theconversation.com/_next/static/chunks/main-4f97b6b08b924568.js39 KB20 KB (53%)✓3rd
https://cdn.theconversation.com/_next/static/chunks/webpack-c74192e1128761c0.js2 KB—✓3rd
https://cdn.theconversation.com/_next/static/chunks/750.73c5c7846b1dec41.js1 KB—✓3rd
https://cdn.theconversation.com/_next/static/chunks/556.199dab58247841b4.js1 KB—✓3rd
https://cdn.theconversation.com/_next/static/chunks/707.8b07a2a212c07232.js1 KB—✓3rd
https://cdn.theconversation.com/_next/static/chunks/607.10d729569c3123af.js3 KB—✓3rd
https://cdn.theconversation.com/_next/static/chunks/222.2000baffbe786662.js1 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

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
Page Weight Inventory
Action
122 resources · 1.3 MB · 201 KB savings available
REVIEW
122 resources · 1.3 MB · 201 KB savings available
Warning::
Page weight 268 KB over 1MB target
Got: 1.3 MB Expected: ≤ 1 MB
Info::
~201 KB of savings available
Warning::
114 third-party resources (91% of weight)
Info::
1 resources over 200KB
122 resources · 1.3 MiB · 114 third-party 267.6 KiB over 1MB target
Image 46% · 589.6 KiB
JavaScript 41% · 529.2 KiB
Document 7% · 94.1 KiB
Font 4% · 54.4 KiB
Other 1% · 12.4 KiB
CSS 1% · 11.8 KiB

~200.9 KiB of savings available

Remove unused JavaScript: 200.9 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0, private, must-revalidate
REVIEW
max-age=0, private, must-revalidate
Info::
Cache-Control header is set
Got: max-age=0, private, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0, private, must-revalidate

DirectiveValueMeaning
max-age0Cache for 0 seconds
private—Only browser cache, not CDN/proxy
must-revalidate—Must recheck with server after expiry
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
12 images, 0 KB saveable
PASS
12 images, 0 KB saveable
Info::
All images are well-optimized
12 images 331 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
3 fonts (54 KB)
PASS
3 fonts (54 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

54 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.1 s LCP 5.0 shttps://cdn.theconversation.com/_next/static/media/libre-baskerville-style-normal-weight-400-latin.640ece80.woff2libre-baskerville-style... https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-normal-weight-400-latin.640ece80.woff2 — 17.4 KiB — 32 ms — font-display: swaphttps://cdn.theconversation.com/_next/static/media/montserrat-style-normal-weight-700-latin.387f0342.woff2montserrat-style-normal... https://cdn.theconversation.com/_next/static/media/montserrat-style-normal-weight-700-latin.387f0342.woff2 — 16.3 KiB — 33 ms — font-display: swaphttps://cdn.theconversation.com/_next/static/media/libre-baskerville-style-italic-weight-400-latin.88dcecf9.woff2libre-baskerville-style... https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-italic-weight-400-latin.88dcecf9.woff2 — 20.7 KiB — 19 ms — font-display: swap
libre-baskerville-style... woff2 swap
Size 17 KB
Load time 32 ms
Start 105 ms
Risk FOUT — text flashes from fallback to web font
montserrat-style-normal... woff2 swap
Size 16 KB
Load time 33 ms
Start 107 ms
Risk FOUT — text flashes from fallback to web font
libre-baskerville-style... woff2 swap
Size 21 KB
Load time 19 ms
Start 411 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
1
preload
3
dns-prefetch
—
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
Network Waterfall
122 requests over 1270ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.1 s LCP 5.0 shttps://theconversation.com// https://theconversation.com/ — 302 — 656 B — 53 ms — h2https://theconversation.com/us/us https://theconversation.com/us — 200 — 93.4 KiB — 7 ms — h2https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-normal-weight-400-latin.640ece80.woff2cdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-normal-weight-400-latin.640ece80.woff2 — 200 — 17.4 KiB — 32 ms — h2https://cdn.theconversation.com/_next/static/media/montserrat-style-normal-weight-700-latin.387f0342.woff2cdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/media/montserrat-style-normal-weight-700-latin.387f0342.woff2 — 200 — 16.3 KiB — 33 ms — h2https://cdn.theconversation.com/_next/static/css/05d5de4c05e9bb39.csscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/css/05d5de4c05e9bb39.css — 200 — 11.8 KiB — 20 ms — h2https://cdn.theconversation.com/_next/static/chunks/376-83511813133dfd5e.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/376-83511813133dfd5e.js — 200 — 4.4 KiB — 23 ms — h2https://cdn.theconversation.com/_next/static/chunks/154-e440db385f39b610.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/154-e440db385f39b610.js — 200 — 3.6 KiB — 18 ms — h2https://cdn.theconversation.com/_next/static/chunks/952.ee0f3a9991d63464.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/952.ee0f3a9991d63464.js — 200 — 2.9 KiB — 20 ms — h2data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHByZXNlcnZlQXNwZWN0U…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHByZXNlcnZlQXNwZWN0U… — 200 — 0 B — 0 ms — datahttps://cdn.theconversation.com/_next/static/chunks/750.73c5c7846b1dec41.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/750.73c5c7846b1dec41.js — 200 — 828 B — 10 ms — h2https://cdn.theconversation.com/_next/static/chunks/162.f5b1421e0df8b041.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/162.f5b1421e0df8b041.js — 200 — 1.6 KiB — 48 ms — h2https://cdn.theconversation.com/_next/static/chunks/159.3c00a5a3bba88a99.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/159.3c00a5a3bba88a99.js — 200 — 600 B — 48 ms — h2https://cdn.theconversation.com/_next/static/chunks/556.199dab58247841b4.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/556.199dab58247841b4.js — 200 — 830 B — 31 ms — h2https://cdn.theconversation.com/_next/static/chunks/707.8b07a2a212c07232.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/707.8b07a2a212c07232.js — 200 — 1.4 KiB — 49 ms — h2https://cdn.theconversation.com/_next/static/chunks/607.10d729569c3123af.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/607.10d729569c3123af.js — 200 — 3.1 KiB — 22 ms — h2https://cdn.theconversation.com/_next/static/chunks/222.2000baffbe786662.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/222.2000baffbe786662.js — 200 — 781 B — 49 ms — h2https://cdn.theconversation.com/_next/static/chunks/webpack-c74192e1128761c0.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/webpack-c74192e1128761c0.js — 200 — 2.5 KiB — 30 ms — h2https://cdn.theconversation.com/_next/static/chunks/framework-0351939e9b0fda1b.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/framework-0351939e9b0fda1b.js — 200 — 44.2 KiB — 50 ms — h2https://cdn.theconversation.com/_next/static/chunks/main-4f97b6b08b924568.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/main-4f97b6b08b924568.js — 200 — 38.6 KiB — 49 ms — h2https://cdn.theconversation.com/_next/static/chunks/pages/_app-a23562af1b6490e4.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/pages/_app-a23562af1b6490e4.js — 200 — 81.5 KiB — 51 ms — h2https://cdn.theconversation.com/_next/static/chunks/685-8dffb47178580529.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/685-8dffb47178580529.js — 200 — 12.1 KiB — 24 ms — h2https://cdn.theconversation.com/_next/static/chunks/354-a98a9cf0d68e44b8.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/354-a98a9cf0d68e44b8.js — 200 — 21.7 KiB — 21 ms — h2https://cdn.theconversation.com/_next/static/chunks/pages/view-4f2621c5c493b11f.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/chunks/pages/view-4f2621c5c493b11f.js — 200 — 3.4 KiB — 45 ms — h2https://cdn.theconversation.com/_next/static/Tjd_35AYvAhIZDZcuXGop/_buildManifest.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/Tjd_35AYvAhIZDZcuXGop/_buildManifest.js — 200 — 1.0 KiB — 34 ms — h2https://cdn.theconversation.com/_next/static/Tjd_35AYvAhIZDZcuXGop/_ssgManifest.jscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/Tjd_35AYvAhIZDZcuXGop/_ssgManifest.js — 200 — 275 B — 47 ms — h2https://theconversation.com/manifest.json/manifest.json https://theconversation.com/manifest.json — 200 — 752 B — 31 ms — h2data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — data
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.1 s LCP 5.0 shttps://theconversation.com// https://theconversation.com/ — 302 — 656 B — 53 ms — h2https://theconversation.com/us/us https://theconversation.com/us — 200 — 93.4 KiB — 7 ms — h2https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-normal-weight-400-latin.640ece80.woff2cdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-normal-weight-400-latin.640ece80.woff2 — 200 — 17.4 KiB — 32 ms — h2https://cdn.theconversation.com/_next/static/media/montserrat-style-normal-weight-700-latin.387f0342.woff2cdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/media/montserrat-style-normal-weight-700-latin.387f0342.woff2 — 200 — 16.3 KiB — 33 ms — h2https://cdn.theconversation.com/_next/static/css/05d5de4c05e9bb39.csscdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/css/05d5de4c05e9bb39.css — 200 — 11.8 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datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo…www.w3.org/2000/svg' %3E%3Cfilter i... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' %3E%3Cfilter id='b' colo… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 150 100'%3E…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 150 100'%3E… — 200 — 0 B — 0 ms — 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https://images.theconversation.com/files/730962/original/file-20260420-57-fovrt4.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=170%2C0%2C683%2C683&fit=crop — 200 — 10.3 KiB — 30 ms — h2https://images.theconversation.com/files/729689/original/file-20260413-57-ps40xm.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=0%2C0%2C1516%2C1516&fit=cropimages.theconversation.com/files/72... https://images.theconversation.com/files/729689/original/file-20260413-57-ps40xm.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=0%2C0%2C1516%2C1516&fit=crop — 200 — 47.1 KiB — 36 ms — h2https://images.theconversation.com/files/729279/original/file-20260410-57-kk78jc.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=298%2C0%2C1198%2C1198&fit=cropimages.theconversation.com/files/72... https://images.theconversation.com/files/729279/original/file-20260410-57-kk78jc.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=298%2C0%2C1198%2C1198&fit=crop — 200 — 23.8 KiB — 24 ms — h2https://images.theconversation.com/files/731136/original/file-20260420-57-digckg.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=1320%2C0%2C3745%2C3744&fit=cropimages.theconversation.com/files/73... https://images.theconversation.com/files/731136/original/file-20260420-57-digckg.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=1320%2C0%2C3745%2C3744&fit=crop — 200 — 17.0 KiB — 27 ms — h2https://images.theconversation.com/files/728454/original/file-20260407-57-xqrqo.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=1155%2C0%2C2970%2C2970&fit=cropimages.theconversation.com/files/72... https://images.theconversation.com/files/728454/original/file-20260407-57-xqrqo.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=1155%2C0%2C2970%2C2970&fit=crop — 200 — 64.5 KiB — 18 ms — h2https://images.theconversation.com/files/730711/original/file-20260417-57-sxkfpr.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=150%2C0%2C1414%2C1414&fit=cropimages.theconversation.com/files/73... https://images.theconversation.com/files/730711/original/file-20260417-57-sxkfpr.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=150%2C0%2C1414%2C1414&fit=crop — 200 — 6.5 KiB — 21 ms — h2https://images.theconversation.com/files/730218/original/file-20260415-57-7ru35o.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=0%2C0%2C1335%2C1335&fit=cropimages.theconversation.com/files/73... https://images.theconversation.com/files/730218/original/file-20260415-57-7ru35o.jpg?q=30&usm=12&cs=strip&w=640&auto=format&rect=0%2C0%2C1335%2C1335&fit=crop — 200 — 12.5 KiB — 14 ms — h2https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-italic-weight-400-latin.88dcecf9.woff2cdn.theconversation.com/_next/stati... https://cdn.theconversation.com/_next/static/media/libre-baskerville-style-italic-weight-400-latin.88dcecf9.woff2 — 200 — 20.7 KiB — 19 ms — h2https://sessions.bugsnag.com/sessions.bugsnag.com/ https://sessions.bugsnag.com/ — 200 — 0 B — 90 ms — h2https://sessions.bugsnag.com/sessions.bugsnag.com/ https://sessions.bugsnag.com/ — 202 — 131 B — 67 ms — h2https://theconversation.com/csrf-token/csrf-token https://theconversation.com/csrf-token — 200 — 1.1 KiB — 48 ms — h2https://theconversation.com/promos?regionCode=us/promos?regionCode=us https://theconversation.com/promos?regionCode=us — 200 — 7.8 KiB — 4 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-WX8PHK9www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-WX8PHK9 — 200 — 132.9 KiB — 72 ms — h2https://theconversation.com/favicon.ico/favicon.ico https://theconversation.com/favicon.ico — 200 — 5.5 KiB — 10 ms — h2https://images.theconversation.com/files/581997/original/9275d5c0-7dd5-4ddf-b50b-98d537e016f4.pngimages.theconversation.com/files/58... https://images.theconversation.com/files/581997/original/9275d5c0-7dd5-4ddf-b50b-98d537e016f4.png — 200 — 253.4 KiB — 28 ms — h3https://theconversation.com/api/graphql/api/graphql https://theconversation.com/api/graphql — 200 — 725 B — 53 ms — h2https://theconversation.com/api/graphql/api/graphql https://theconversation.com/api/graphql — 200 — 993 B — 54 ms — h2https://www.googletagmanager.com/gtag/js?id=G-3GXW6PB79X&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-3GXW6PB79X&cx=c&gtm=4e64h1 — 200 — 171.1 KiB — 56 ms — h2https://analytics.google.com/g/collect?v=2&tid=G-3GXW6PB79X&gtm=45je64h1v876406581z89117034742za20gzb9117034742zd9117034742&_p=1776797457110&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=2060242576.1776797458&frm=0&pscdl=noapi&rcb=10&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&_s=1&tag_exp=0~115616985~115938466~115938468~117266400&sid=1776797457&sct=1&seg=0&dl=https%3A%2F%2Ftheconversation.com%2Fus&dt=The%20Conversation%20U.S.%20-%20News%20written%20by%20researchers%20and%20scientists%20to%20help%20you%20understand&en=page_view&_fv=1&_nsi=1&_ss=1&ep.commissioning_region=us&ep.region_code=us&ep.page_type=home_page&up.user_type=Reader&tfd=1226analytics.google.com/g/collect?v=2&... 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h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-3GXW6PB79X&cid=2060242576.1776797458&gtm=45je64h1v876406581z89117034742za20gzb9117034742zd9117034742&rcb=10&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115616985~115938466~115938468~117266400stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-3GXW6PB79X&cid=2060242576.1776797458&gtm=45je64h1v876406581z89117034742za20gzb9117034742zd9117034742&rcb=10&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115616985~115938466~115938468~117266400 — 204 — 560 B — 42 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
69% of JavaScript execution is third-party
First-party Third-party 3241ms · 472KB · $43/mo
Unattributable
Other
Costly
Execution 1092ms
Transfer 0 KB
Monthly Cost $14/mo
cdn.theconversation.com
Other
Costly
Execution 840ms
Transfer 44 KB
Monthly Cost $11/mo
Google Tag Manager
Tag Manager
Costly
Execution 405ms
Transfer 133 KB
Unused 44%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 377ms
Transfer 171 KB
Unused 39%
Monthly Cost $5/mo
cdn.theconversation.com
Other
Costly
Execution 306ms
Transfer 82 KB
Unused 67%
Monthly Cost $4/mo
cdn.theconversation.com
Other
Optional
Execution 127ms
Transfer 39 KB
Unused 53%
Monthly Cost $2/mo
cdn.theconversation.com
Other
Optional
Execution 94ms
Transfer 3 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1092ms and costs ~$14/month
  • cdn.theconversation.com adds 840ms and costs ~$11/month
  • Google Tag Manager adds 405ms and costs ~$5/month
  • Google Tag Manager adds 377ms and costs ~$5/month
  • cdn.theconversation.com adds 306ms and costs ~$4/month

69% 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 1092ms 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

cdn.theconversation.com takes 840ms 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 405ms 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 377ms 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

cdn.theconversation.com takes 306ms 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

67% of cdn.theconversation.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

53% of cdn.theconversation.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

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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