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https://www.worldbank.org

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
3
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
81
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.
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.

1.54 s

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

2.51 s

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

589 ms

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

0.062

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

2.22 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.

26.76 s

Page Load Progression

602 ms
1.2 s
1.8 s
2.4 s
3.0 s
3.6 s
4.2 s
4.8 s
Checks
14
7 PASS 2 REVIEW 3 FIX
F
Page Weight Budget
Action
9.3 MB transferred, 159 requests
FIX
9.3 MB transferred, 159 requests
Critical::
Page weighs 12.4 MB (9.3 MB transferred)
Warning::
Images are 4.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.5 MB
Warning::
JavaScript is 755 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 755 KB
Warning::
159 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.0 g CO2 per page load
9.3 MB / 2.4 MB budget
9.3 MB transferred
159 requests
2.0 g CO2 per page load
Images 4.5 MiB 48%
Other 3.8 MiB 41%
JavaScript 754.7 KiB 8%
Fonts 116.1 KiB 1%
CSS 76.9 KiB 1%
Other 28.4 KiB 0%
HTML 10.7 KiB 0%
Other 7.6 KiB 0%
Other 7.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

Why this matters

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

Source: web.dev

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

Why this matters

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

Source: web.dev

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

D
Third-Party Impact
Action
74% third-party, 0 ms blocking
FIX
74% third-party, 0 ms blocking
Warning::
Third-party code accounts for 74% of page weight (6.8 MiB of 9.3 MiB)
Info::
Third-party blocking time is low (0 ms)
26%
74%
First-party Third-party
F
JS Execution Cost
Action
4876ms total JS execution
FIX
4876ms total JS execution
Warning::
Unattributable: 1412ms CPU time
Warning::
https://www.worldbank.org/ext/en/home: 1128ms CPU time
Warning::
https://assets.adobedtm.com/223f6e2cf7c9/3eb6c9b72...: 800ms CPU time
Warning::
https://script.crazyegg.com/pages/versioned/common...: 305ms CPU time
Info::
https://connect.facebook.net/en_US/fbevents.js: 173ms CPU time
Warning::
Third-party scripts: 3500ms (72% of total)

Main Thread Breakdown

Script Evaluation 44% Other 30% Style & Layout 14% Script Parsing & Compilation 6% Rendering 3%
ScriptTotalScriptingParse/CompileParty
Unattributable1412ms206ms0ms3rd
https://www.worldbank.org/ext/en/home1128ms43ms1ms1st
https://assets.adobedtm.com/223f6e2cf7c9/3eb6c9b72a93/launch-7bc0cdc67098.min.js800ms694ms67ms3rd
https://script.crazyegg.com/pages/versioned/common-scripts/fa37f361d63404d4cc11b194e70c4ff0.js305ms266ms20ms3rd
https://connect.facebook.net/en_US/fbevents.js173ms123ms48ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-972661263172ms112ms56ms3rd
https://connect.facebook.net/signals/config/1458892451075570?v=2.9.291&r=stable&domain=www.worldbank.org&hme=295b1b33901e14aeab879c0b58f907ef4d5f44fdd19814310771af911c5f6ac8&ex_m=102%2C198%2C147%2C22%2C70%2C71%2C139%2C66%2C65%2C11%2C155%2C88%2C16%2C132%2C124%2C37%2C73%2C76%2C130%2C152%2C157%2C8%2C4%2C5%2C7%2C6%2C3%2C89%2C99%2C158%2C163%2C212%2C60%2C179%2C180%2C53%2C267%2C30%2C72%2C224%2C223%2C222%2C23%2C32%2C101%2C59%2C10%2C61%2C95%2C96%2C97%2C103%2C127%2C31%2C29%2C129%2C126%2C125%2C148%2C74%2C151%2C149%2C150%2C48%2C58%2C120%2C15%2C154%2C43%2C254%2C255%2C253%2C26%2C27%2C28%2C46%2C140%2C75%2C110%2C18%2C20%2C42%2C38%2C40%2C39%2C81%2C90%2C94%2C108%2C138%2C141%2C44%2C109%2C24%2C21%2C116%2C67%2C35%2C143%2C142%2C144%2C135%2C133%2C25%2C34%2C57%2C107%2C153%2C68%2C17%2C145%2C112%2C79%2C64%2C19%2C83%2C84%2C113%2C82%2C33%2C284%2C205%2C194%2C195%2C193%2C287%2C279%2C50%2C206%2C105%2C128%2C78%2C118%2C52%2C45%2C47%2C111%2C117%2C123%2C56%2C62%2C51%2C54%2C98%2C156%2C1%2C121%2C14%2C119%2C12%2C2%2C55%2C91%2C63%2C115%2C87%2C86%2C159%2C160%2C92%2C93%2C9%2C122%2C100%2C49%2C136%2C85%2C77%2C69%2C114%2C104%2C41%2C137%2C0%2C80%2C131%2C134%2C146%2C36%2C106%2C13%2C161155ms133ms21ms3rd
https://connect.facebook.net/en_US/bundle/sdk.js/134ms99ms35ms3rd
https://snap.licdn.com/li.lms-analytics/insight.min.js109ms72ms31ms3rd
https://assets.adobedtm.com/223f6e2cf7c9/3eb6c9b72a93/d5977858cb5b/EX51e37310f3ce49768fc15025b0a40207-libraryCode_source.min.js109ms95ms12ms3rd

Showing top 10 of 15 scripts

B
Image Optimization
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Info::
All images are well-optimized
32 images 4.5 MB
0 oversized -0 KB
27 legacy format
0 missing dimensions CLS risk
C
JS Bundles
Action
62 scripts, 239 KB unused
REVIEW
62 scripts, 239 KB unused
Warning::
https://connect.facebook.net/en_US/bundle/sdk.js/: 54 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-972...: 51 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/223f6e2cf7c9/3eb6c9b72...: 39 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/npm/swiper@11/swiper-bund...: 37 KB unused (86%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://connect.facebook.net/en_US/fbevents.js: 33 KB unused (35%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 239 KB
239 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://connect.facebook.net/en_US/bundle/sdk.js/78 KB54 KB (70%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-972661263145 KB51 KB (35%)✓3rd
https://assets.adobedtm.com/223f6e2cf7c9/3eb6c9b72a93/launch-7bc0cdc67098.min.js107 KB39 KB (36%)✓3rd
https://cdn.jsdelivr.net/npm/swiper@11/swiper-bundle.min.js43 KB37 KB (86%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB33 KB (35%)✓3rd
https://script.crazyegg.com/pages/versioned/common-scripts/fa37f361d63404d4cc11b194e70c4ff0.js51 KB24 KB (48%)✓3rd
https://www.worldbank.org/ext/blocks/header/language-selector.js2 KB—✓1st
https://connect.facebook.net/signals/config/1458892451075570?v=2.9.291&r=stable&domain=www.worldbank.org&hme=295b1b33901e14aeab879c0b58f907ef4d5f44fdd19814310771af911c5f6ac8&ex_m=102%2C198%2C147%2C22%2C70%2C71%2C139%2C66%2C65%2C11%2C155%2C88%2C16%2C132%2C124%2C37%2C73%2C76%2C130%2C152%2C157%2C8%2C4%2C5%2C7%2C6%2C3%2C89%2C99%2C158%2C163%2C212%2C60%2C179%2C180%2C53%2C267%2C30%2C72%2C224%2C223%2C222%2C23%2C32%2C101%2C59%2C10%2C61%2C95%2C96%2C97%2C103%2C127%2C31%2C29%2C129%2C126%2C125%2C148%2C74%2C151%2C149%2C150%2C48%2C58%2C120%2C15%2C154%2C43%2C254%2C255%2C253%2C26%2C27%2C28%2C46%2C140%2C75%2C110%2C18%2C20%2C42%2C38%2C40%2C39%2C81%2C90%2C94%2C108%2C138%2C141%2C44%2C109%2C24%2C21%2C116%2C67%2C35%2C143%2C142%2C144%2C135%2C133%2C25%2C34%2C57%2C107%2C153%2C68%2C17%2C145%2C112%2C79%2C64%2C19%2C83%2C84%2C113%2C82%2C33%2C284%2C205%2C194%2C195%2C193%2C287%2C279%2C50%2C206%2C105%2C128%2C78%2C118%2C52%2C45%2C47%2C111%2C117%2C123%2C56%2C62%2C51%2C54%2C98%2C156%2C1%2C121%2C14%2C119%2C12%2C2%2C55%2C91%2C63%2C115%2C87%2C86%2C159%2C160%2C92%2C93%2C9%2C122%2C100%2C49%2C136%2C85%2C77%2C69%2C114%2C104%2C41%2C137%2C0%2C80%2C131%2C134%2C146%2C36%2C106%2C13%2C16138 KB—✓3rd
https://www.worldbank.org/ext/scripts/carousel-init.js2 KB—✓1st
https://www.worldbank.org/ext/blocks/popup-card/popup-card.js3 KB—✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

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
3 fonts (116 KB)
PASS
3 fonts (116 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

116 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 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.5 s LCP 2.5 shttps://www.worldbank.org/ext/fonts/loopicon.ttf?eq39m6loopicon.ttf https://www.worldbank.org/ext/fonts/loopicon.ttf?eq39m6 — 38.8 KiB — 0 ms — font-display: swaphttps://www.worldbank.org/ext/fonts/OpenSans-Bold.woff2OpenSans-Bold.woff2 https://www.worldbank.org/ext/fonts/OpenSans-Bold.woff2 — 18.2 KiB — 0 ms — font-display: swaphttps://www.worldbank.org/ext/fonts/OpenSans-Regular.woff2OpenSans-Regular.woff2 https://www.worldbank.org/ext/fonts/OpenSans-Regular.woff2 — 59.1 KiB — 0 ms — font-display: swap
loopicon.ttf ttf swap
Size 39 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
OpenSans-Bold.woff2 woff2 swap
Size 18 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
OpenSans-Regular.woff2 woff2 swap
Size 59 KB
Load time 0 ms
Start 0 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)

Fixing the unchecked items could save ~12 KB and ~24 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
10 hints, 0 missing preconnects
PASS
10 hints, 0 missing preconnects
Info::
Page uses 10 resource hint(s)

Current Resource Hints

preconnect
5
preload
5
dns-prefetch
—
prefetch
—

10 resource hints configured

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=60 (1 minute)
PASS
max-age=60 (1 minute)
Info::
Cache-Control header is set
Got: public, max-age=60
Info::
Effective TTL: 1 minute (max-age=60)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=60

DirectiveValueMeaning
public—Any cache may store this response
max-age60Cache for 1 minute
Effective TTL: 60 seconds
Network Waterfall
159 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
72% of JavaScript execution is third-party
First-party Third-party 3500ms · 626KB · $46/mo
Unattributable
Other
Costly
Execution 1412ms
Transfer 0 KB
Monthly Cost $19/mo
assets.adobedtm.com
Other
Costly
Execution 800ms
Transfer 107 KB
Unused 36%
Monthly Cost $11/mo
script.crazyegg.com
Other
Costly
Execution 305ms
Transfer 51 KB
Unused 48%
Monthly Cost $4/mo
Facebook Pixel
Advertising
Optional
Execution 173ms
Transfer 95 KB
Unused 35%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 172ms
Transfer 145 KB
Unused 35%
Monthly Cost $2/mo
Facebook Pixel
Advertising
Optional
Execution 155ms
Transfer 38 KB
Monthly Cost $2/mo
Facebook Pixel
Advertising
Optional
Execution 134ms
Transfer 78 KB
Unused 70%
Monthly Cost $2/mo
LinkedIn Insight
Advertising
Optional
Execution 109ms
Transfer 19 KB
Monthly Cost $1/mo
assets.adobedtm.com
Other
Optional
Execution 109ms
Transfer 27 KB
Monthly Cost $1/mo
script.crazyegg.com
Other
Optional
Execution 74ms
Transfer 22 KB
Monthly Cost $1/mo
jsDelivr
CDN
Optional
Execution 57ms
Transfer 43 KB
Unused 86%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1412ms and costs ~$19/month
  • assets.adobedtm.com adds 800ms and costs ~$11/month
  • script.crazyegg.com adds 305ms and costs ~$4/month

72% 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

Unattributable takes 1412ms 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

assets.adobedtm.com takes 800ms 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 305ms 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

70% of Facebook Pixel'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

86% of jsDelivr'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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