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https://oecd-ilibrary.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
3
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
44
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.
77
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.

5.60 s

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

12.44 s

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

632 ms

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

0.033

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

5.93 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.

12.66 s

Page Load Progression

406 ms
812 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
17
9 PASS 3 REVIEW 3 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3576ms total JS execution
FIX
3576ms total JS execution
Warning::
https://www.oecd.org/en/publications.html: 661ms CPU time
Warning::
https://surveys-static-prd.survicate-cdn.com/widge...: 523ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-P5J...: 475ms CPU time
Warning::
Unattributable: 433ms CPU time
Warning::
https://static-p53839-e349852.adobeaemcloud.com/bb...: 403ms CPU time
Warning::
Third-party scripts: 3576ms (100% of total)

Main Thread Breakdown

Script Evaluation 52% Style & Layout 19% Other 14% Script Parsing & Compilation 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.oecd.org/en/publications.html661ms63ms7ms3rd
https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js523ms379ms77ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-P5JSM4P475ms409ms44ms3rd
Unattributable433ms7ms0ms3rd
https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/theme.js403ms124ms11ms3rd
https://www.googletagmanager.com/gtag/js?id=G-F7KSNTXTRX&cx=c&gtm=4e64h1283ms235ms46ms3rd
https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js263ms227ms15ms3rd
https://www.oecd.org/cdn-cgi/challenge-platform/scripts/jsd/main.js217ms198ms3ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JK2HCFJNL1&cx=c&gtm=4e64h1206ms168ms37ms3rd
https://www.google-analytics.com/analytics.js58ms45ms5ms3rd

Showing top 10 of 11 scripts

D
Page Weight Inventory
Action
64 resources · 1.6 MB · 288 KB savings available
FIX
64 resources · 1.6 MB · 288 KB savings available
Warning::
Page weight 614 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~288 KB of savings available
Warning::
63 third-party resources (100% of weight)
64 resources · 1.6 MiB · 63 third-party 613.8 KiB over 1MB target
JavaScript 51% · 827.6 KiB
Image 25% · 405.9 KiB
Document 10% · 162.8 KiB
Font 10% · 158.9 KiB
CSS 5% · 75.2 KiB
Other 0% · 7.3 KiB

~287.9 KiB of savings available

Remove unused JavaScript: 287.9 KiB
C
Page Weight Budget
Action
1.6 MB transferred, 64 requests
REVIEW
1.6 MB transferred, 64 requests
Info::
Page weighs 5.3 MB (1.6 MB transferred)
Warning::
JavaScript is 824 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 824 KB
Info::
64 HTTP requests
Info::
Estimated 0.34 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
64 requests
0.34 g CO2 per page load
JavaScript 823.8 KiB 50%
Images 398.4 KiB 24%
HTML 162.6 KiB 10%
Fonts 158.9 KiB 10%
CSS 75.2 KiB 5%
Other 9.4 KiB 1%
Other 8.5 KiB 1%
Other 988 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
JS Bundles
Action
17 scripts, 288 KB unused
REVIEW
17 scripts, 288 KB unused
Warning::
https://surveys-static-prd.survicate-cdn.com/widge...: 65 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-P5J...: 65 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-JK2H...: 65 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-F7KS...: 63 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://script.crazyegg.com/pages/versioned/common...: 29 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 288 KB
288 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js161 KB65 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-P5JSM4P181 KB65 KB (36%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-JK2HCFJNL1&cx=c&gtm=4e64h1152 KB65 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-F7KSNTXTRX&cx=c&gtm=4e64h1152 KB63 KB (41%)✓3rd
https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js55 KB29 KB (53%)✓3rd
https://www.oecd.org/etc.clientlibs/oecd/clientlibs/clientlib-base.lc-cfd8fccbd7bd3edcddf562f1ca8a30e7-lc.min.js22 KB—✓3rd
https://www.oecd.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?12 KB—✓3rd
https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/dist.a89178bd.js7 KB—✓3rd
https://www.oecd.org/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js1 KB—✓3rd
https://www.google-analytics.com/analytics.js21 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

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

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 398 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
Font Loading
7 fonts (159 KB)
PASS
7 fonts (159 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

159 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.6 s LCP 12.4 shttps://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-500-latin.e6eeb184.woff2noto-sans-500-latin.e6e... https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-500-latin.e6eeb184.woff2 — 14.2 KiB — 14 ms — font-display: swaphttps://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-400-latin.bcd3f5cc.woff2noto-sans-400-latin.bcd... https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-400-latin.bcd3f5cc.woff2 — 14.3 KiB — 9 ms — font-display: swaphttps://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-700-latin.ac6371c7.woff2noto-sans-700-latin.ac6... https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-700-latin.ac6371c7.woff2 — 13.8 KiB — 10 ms — font-display: swaphttps://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-display-latin.f7492f65.woff2noto-sans-display-latin... https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/noto-sans-display-latin.f7492f65.woff2 — 35.1 KiB — 15 ms — font-display: swaphttps://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2open-sans-latin.woff2 https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2 — 39.3 KiB — 27 ms — font-display: swaphttps://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2open-sans-latin.woff2 https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2 — 0 B — 29 ms — font-display: swaphttps://surveys-static-prd.survicate-cdn.com/fonts/open-sans-italic-latin.woff2open-sans-italic-latin.... https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-italic-latin.woff2 — 42.1 KiB — 29 ms — font-display: swap
noto-sans-500-latin.e6e... woff2 swap
Size 14 KB
Load time 14 ms
Start 432 ms
Risk FOUT — text flashes from fallback to web font
noto-sans-400-latin.bcd... woff2 swap
Size 14 KB
Load time 9 ms
Start 432 ms
Risk FOUT — text flashes from fallback to web font
noto-sans-700-latin.ac6... woff2 swap
Size 14 KB
Load time 10 ms
Start 432 ms
Risk FOUT — text flashes from fallback to web font
noto-sans-display-latin... woff2 swap
Size 35 KB
Load time 15 ms
Start 433 ms
Risk FOUT — text flashes from fallback to web font
open-sans-latin.woff2 woff2 swap
Size 39 KB
Load time 27 ms
Start 3.2 s
Risk FOUT — text flashes from fallback to web font
open-sans-latin.woff2 woff2 swap
Size 0 KB
Load time 29 ms
Start 3.2 s
Risk FOUT — text flashes from fallback to web font
open-sans-italic-latin.... woff2 swap
Size 42 KB
Load time 29 ms
Start 3.2 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)
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+
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
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
64 requests over 3590ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 5.6 s LCP 12.4 shttps://oecd-ilibrary.org// https://oecd-ilibrary.org/ — 301 — 230 B — 11 ms — h2https://www.oecd.org/en/publications.htmlwww.oecd.org/en/publications.html https://www.oecd.org/en/publications.html — 200 — 162.6 KiB — 309 ms — h2https://www.oecd.org/.rum/@adobe/helix-rum-js@%5E2/dist/micro.jswww.oecd.org/.rum/@adobe/helix-rum-... https://www.oecd.org/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js — 200 — 958 B — 46 ms — h2https://www.oecd.org/etc.clientlibs/oecd/clientlibs/clientlib-base.lc-d8e9a44764866640e709abbb8b7e48f7-lc.min.csswww.oecd.org/etc.clientlibs/oecd/cl... https://www.oecd.org/etc.clientlibs/oecd/clientlibs/clientlib-base.lc-d8e9a44764866640e709abbb8b7e48f7-lc.min.css — 200 — 2.3 KiB — 37 ms — h2https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/theme.cssstatic-p53839-e349852.adobeaemcloud... https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/theme.css — 200 — 71.0 KiB — 57 ms — h2https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--adb459b8-8956-447c-a2c4-a8cf8a1b77a5/publication-header.png?quality=80&width=800&preferwebp=truewww.oecd.org/adobe/dynamicmedia/del... https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--adb459b8-8956-447c-a2c4-a8cf8a1b77a5/publication-header.png?quality=80&width=800&preferwebp=true — 200 — 102.5 KiB — 205 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=1033969&u=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&vn=2.1&x=truedev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=1033969&u=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&vn=2.1&x=true — 200 — 3.8 KiB — 62 ms — h2https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/theme.jsstatic-p53839-e349852.adobeaemcloud... https://static-p53839-e349852.adobeaemcloud.com/bb98e20436f2d4e57068da7d4d3d125802ca2946fd87687e4b48b1acb2883872/theme.js — 200 — 33.3 KiB — 15 ms — h2https://www.oecd.org/etc.clientlibs/core/wcm/components/commons/site/clientlibs/container.lc-0a6aff292f5cc42142779cde92054524-lc.min.jswww.oecd.org/etc.clientlibs/core/wc... https://www.oecd.org/etc.clientlibs/core/wcm/components/commons/site/clientlibs/container.lc-0a6aff292f5cc42142779cde92054524-lc.min.js — 200 — 894 B — 48 ms — h3https://www.oecd.org/etc.clientlibs/oecd/clientlibs/clientlib-base.lc-cfd8fccbd7bd3edcddf562f1ca8a30e7-lc.min.jswww.oecd.org/etc.clientlibs/oecd/cl... https://www.oecd.org/etc.clientlibs/oecd/clientlibs/clientlib-base.lc-cfd8fccbd7bd3edcddf562f1ca8a30e7-lc.min.js — 200 — 22.5 KiB — 62 ms — h3https://www.googletagmanager.com/gtm.js?id=GTM-P5JSM4Pwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-P5JSM4P — 200 — 181.0 KiB — 167 ms — h2data:image/svg+xml, %3Csvg%20width=%2716%27%20height=%2716%27%20fill=%27none%27%20xmlns=%27http%3A%…data:image/svg+xml, %3Csvg%20width=... data:image/svg+xml, %3Csvg%20width=%2716%27%20height=%2716%27%20fill=%27none%27%20xmlns=%27http%3A%… — 200 — 0 B — 0 ms — datadata:image/svg+xml, %3Csvg%20width=%2716%27%20height=%2716%27%20fill=%27none%27%20xmlns=%27http%3A%…data:image/svg+xml, %3Csvg%20width=... data:image/svg+xml, %3Csvg%20width=%2716%27%20height=%2716%27%20fill=%27none%27%20xmlns=%27http%3A%… — 200 — 0 B — 0 ms — datadata:image/svg+xml, %3Csvg%20width=%2716%27%20height=%2716%27%20viewBox=%270%200%2016%2016%27%20fil…data:image/svg+xml, %3Csvg%20width=... data:image/svg+xml, %3Csvg%20width=%2716%27%20height=%2716%27%20viewBox=%270%200%2016%2016%27%20fil… — 200 — 0 B — 0 ms — datahttps://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--73f6b3c9-9318-4981-931b-ae902a3d41d4/a819c008-fr.jpg?quality=80&width=1200&preferwebp=truewww.oecd.org/adobe/dynamicmedia/del... https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--73f6b3c9-9318-4981-931b-ae902a3d41d4/a819c008-fr.jpg?quality=80&width=1200&preferwebp=true — 200 — 160.4 KiB — 107 ms — h3https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--9b78a0e4-78f6-4dd8-90d3-8f346c7a5449/df51b240-fr.jpg?quality=80&width=1200&preferwebp=truewww.oecd.org/adobe/dynamicmedia/del... https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--9b78a0e4-78f6-4dd8-90d3-8f346c7a5449/df51b240-fr.jpg?quality=80&width=1200&preferwebp=true — 200 — 60.8 KiB — 93 ms — h3https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--2dc4ce87-df30-4970-93e3-d1bcfc26937f/d4623013-en.jpg?quality=80&width=576&preferwebp=truewww.oecd.org/adobe/dynamicmedia/del... https://www.oecd.org/adobe/dynamicmedia/deliver/dm-aid--2dc4ce87-df30-4970-93e3-d1bcfc26937f/d4623013-en.jpg?quality=80&width=576&preferwebp=true — 200 — 23.6 KiB — 90 ms — 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https://region1.google-analytics.com/g/collect?v=2&tid=G-F7KSNTXTRX&gtm=45je64h1v876099116z8810066145za20gzb810066145zd810066145&_p=1776806311926&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&_eu=EA&are=1&cid=1266206131.1776806312&frm=0&ir=1&pscdl=noapi&rcb=15&sr=412x823&tt=internal&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400&dl=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&sid=1776806312&sct=1&seg=0&dt=Publications%20%7C%20OECD&en=page_view&_fv=1&_nsi=1&_ss=1&ep.is_directorates=yes&ep.is_global=yes&ep.is_satellite=no&ep.site_name=www.oecd.org&ep.site_environment=PROD&ep.publication_date=2024-07-01T10%3A00%3A00Z&ep.publication_name=Publications&ep.page_current_path=%2Foecd%2Fen%2Fpublications&tfd=854 — 204 — 547 B — 83 ms — h2https://script.crazyegg.com/pages/data-scripts/0126/6330/site/www.oecd.org.json?t=1script.crazyegg.com/pages/data-scri... https://script.crazyegg.com/pages/data-scripts/0126/6330/site/www.oecd.org.json?t=1 — 200 — 2.1 KiB — 44 ms — h3https://www.google-analytics.com/j/collect?v=1&_v=j102&a=1876402977&t=pageview&_s=1&dl=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&ul=en-us&dt=Publications%20%7C%20OECD&sr=412x823&vp=412x823&_u=YCDAiEABBAAAACgEKg~&jid=1615326386&gjid=882406209&cid=1266206131.1776806312&tid=UA-136634323-1&_gid=603549137.1776806312&_slc=1&gtm=45He64h1n81P5JSM4Pv810066145za200zd810066145&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115616985~115938465~115938468~117266401&cd12=1266206131.1776806312&npa=1&z=944206515www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=1876402977&t=pageview&_s=1&dl=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&ul=en-us&dt=Publications%20%7C%20OECD&sr=412x823&vp=412x823&_u=YCDAiEABBAAAACgEKg~&jid=1615326386&gjid=882406209&cid=1266206131.1776806312&tid=UA-136634323-1&_gid=603549137.1776806312&_slc=1&gtm=45He64h1n81P5JSM4Pv810066145za200zd810066145&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115616985~115938465~115938468~117266401&cd12=1266206131.1776806312&npa=1&z=944206515 — 200 — 450 B — 31 ms — h2https://stats.g.doubleclick.net/j/collect?t=dc&aip=1&_r=3&v=1&_v=j102&tid=UA-136634323-1&cid=1266206131.1776806312&jid=1615326386&gjid=882406209&_gid=603549137.1776806312&npa=1&_u=YCDAiEABBAAAAGgEKgC~&z=1383399412stats.g.doubleclick.net/j/collect?t... https://stats.g.doubleclick.net/j/collect?t=dc&aip=1&_r=3&v=1&_v=j102&tid=UA-136634323-1&cid=1266206131.1776806312&jid=1615326386&gjid=882406209&_gid=603549137.1776806312&npa=1&_u=YCDAiEABBAAAAGgEKgC~&z=1383399412 — 200 — 648 B — 93 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-JK2HCFJNL1&gtm=45je64h1v878618825z8810066145za20gzb810066145zd810066145&_p=1776806311926&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1266206131.1776806312&frm=0&pscdl=noapi&rcb=0&sr=412x823&tt=internal&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406~118128923&dl=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&sid=1776806312&sct=1&seg=0&dt=Publications%20%7C%20OECD&en=page_view&_fv=1&_ss=1&ep.is_directorates=yes&ep.is_global=yes&ep.is_satellite=no&ep.site_name=www.oecd.org&ep.site_environment=PROD&ep.publication_date=2024-07-01T10%3A00%3A00Z&ep.publication_name=Publications&ep.page_current_path=%2Foecd%2Fen%2Fpublications&tfd=924region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-JK2HCFJNL1&gtm=45je64h1v878618825z8810066145za20gzb810066145zd810066145&_p=1776806311926&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1266206131.1776806312&frm=0&pscdl=noapi&rcb=0&sr=412x823&tt=internal&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406~118128923&dl=https%3A%2F%2Fwww.oecd.org%2Fen%2Fpublications.html&sid=1776806312&sct=1&seg=0&dt=Publications%20%7C%20OECD&en=page_view&_fv=1&_ss=1&ep.is_directorates=yes&ep.is_global=yes&ep.is_satellite=no&ep.site_name=www.oecd.org&ep.site_environment=PROD&ep.publication_date=2024-07-01T10%3A00%3A00Z&ep.publication_name=Publications&ep.page_current_path=%2Foecd%2Fen%2Fpublications&tfd=924 — 204 — 48 B — 32 ms — h2https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.jsscript.crazyegg.com/pages/versioned... https://script.crazyegg.com/pages/versioned/common-scripts/4ce8c7df8d425cc50464576824ed91eb.js — 200 — 55.3 KiB — 59 ms — h3https://surveys-static-prd.survicate-cdn.com/fonts/fonts.csssurveys-static-prd.survicate-cdn.co... https://surveys-static-prd.survicate-cdn.com/fonts/fonts.css — 200 — 1.9 KiB — 101 ms — h2https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.jssurveys-static-prd.survicate-cdn.co... https://surveys-static-prd.survicate-cdn.com/widget_core-28.23.14.js — 200 — 161.4 KiB — 145 ms — h2https://script.crazyegg.com/pages/data-scripts/0126/6330/sampling/www.oecd.org.json?t=1script.crazyegg.com/pages/data-scri... https://script.crazyegg.com/pages/data-scripts/0126/6330/sampling/www.oecd.org.json?t=1 — 200 — 376 B — 24 ms — h3https://tracking.crazyegg.com/clock?u=1266330&st=455070&t=1776806312640&tk=f07f983051e3082671ec3ed244aa0bbbtracking.crazyegg.com/clock?u=12663... https://tracking.crazyegg.com/clock?u=1266330&st=455070&t=1776806312640&tk=f07f983051e3082671ec3ed244aa0bbb — 204 — 0 B — 162 ms — h2https://pagestates-tracking.crazyegg.com/healthcheckpagestates-tracking.crazyegg.com/he... https://pagestates-tracking.crazyegg.com/healthcheck — 200 — 462 B — 84 ms — h2https://assets-tracking.crazyegg.com/healthcheckassets-tracking.crazyegg.com/health... https://assets-tracking.crazyegg.com/healthcheck — 200 — 461 B — 86 ms — h2blob:https://www.oecd.org/3734eecc-c0a9-41cb-ac08-56dfd7ef5863www.oecd.org/3734eecc-c0a9-41cb-ac0... blob:https://www.oecd.org/3734eecc-c0a9-41cb-ac08-56dfd7ef5863 — 200 — -1 B — 7 ms — blobhttps://www.oecd.org/etc.clientlibs/oecd/clientlibs/clientlib-base/resources/icon-192x192.pngwww.oecd.org/etc.clientlibs/oecd/cl... 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https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2 — 200 — 39.3 KiB — 27 ms — h2https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2surveys-static-prd.survicate-cdn.co... https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-latin.woff2 — 200 — 0 B — 29 ms — h2https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-italic-latin.woff2surveys-static-prd.survicate-cdn.co... https://surveys-static-prd.survicate-cdn.com/fonts/open-sans-italic-latin.woff2 — 200 — 42.1 KiB — 29 ms — h2https://respondent.survicate.com/workspaces/74f34366c465174a7b091c6cbfd7127e/surveys/5e740f0ce98b6cbd/seen.jsonrespondent.survicate.com/workspaces... https://respondent.survicate.com/workspaces/74f34366c465174a7b091c6cbfd7127e/surveys/5e740f0ce98b6cbd/seen.json — 204 — 0 B — 161 ms — h2https://respondent.survicate.com/workspaces/74f34366c465174a7b091c6cbfd7127e/surveys/5e740f0ce98b6cbd/seen.jsonrespondent.survicate.com/workspaces... 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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
100% of JavaScript execution is third-party
First-party Third-party 3576ms · 941KB · $47/mo
www.oecd.org
Other
Costly
Execution 661ms
Transfer 163 KB
Monthly Cost $9/mo
surveys-static-prd.survicate-cdn.com
Other
Costly
Execution 523ms
Transfer 161 KB
Unused 41%
Monthly Cost $7/mo
Google Tag Manager
Tag Manager
Costly
Execution 475ms
Transfer 181 KB
Unused 36%
Monthly Cost $6/mo
Unattributable
Other
Costly
Execution 433ms
Transfer 0 KB
Monthly Cost $6/mo
static-p53839-e349852.adobeaemcloud.com
Other
Costly
Execution 403ms
Transfer 33 KB
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 283ms
Transfer 152 KB
Unused 41%
Monthly Cost $4/mo
script.crazyegg.com
Other
Costly
Execution 263ms
Transfer 55 KB
Unused 53%
Monthly Cost $4/mo
www.oecd.org
Other
Costly
Execution 217ms
Transfer 0 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 206ms
Transfer 152 KB
Unused 43%
Monthly Cost $3/mo
Google Analytics
Analytics
Optional
Execution 58ms
Transfer 21 KB
Monthly Cost $1/mo
www.oecd.org
Other
Optional
Execution 55ms
Transfer 22 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.oecd.org adds 661ms and costs ~$9/month
  • surveys-static-prd.survicate-cdn.com adds 523ms and costs ~$7/month
  • Google Tag Manager adds 475ms and costs ~$6/month
  • Unattributable adds 433ms and costs ~$6/month
  • static-p53839-e349852.adobeaemcloud.com adds 403ms and costs ~$5/month
  • Google Tag Manager adds 283ms and costs ~$4/month
  • script.crazyegg.com adds 263ms and costs ~$4/month
  • www.oecd.org adds 217ms and costs ~$3/month
  • Google Tag Manager adds 206ms and costs ~$3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.oecd.org takes 661ms 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

surveys-static-prd.survicate-cdn.com takes 523ms 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 475ms 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 433ms 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

static-p53839-e349852.adobeaemcloud.com takes 403ms 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 283ms 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

script.crazyegg.com takes 263ms 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

53% of script.crazyegg.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

www.oecd.org takes 217ms 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 206ms 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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