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https://worldhistory.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
6
REVIEW
1
PASS
8
INFO
2

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

Mobile Desktop
49
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
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.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

2.70 s

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

7.06 s

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

956 ms

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

0.000

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

4.45 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.

18.68 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 1 REVIEW 6 FIX
F
Page Weight Budget
Action
3.2 MB transferred, 107 requests
FIX
3.2 MB transferred, 107 requests
Warning::
Page weighs 7.1 MB (3.2 MB transferred)
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Warning::
107 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.67 g CO2 per page load
3.2 MB / 2.4 MB budget
3.2 MB transferred
107 requests
0.67 g CO2 per page load
Images 1.7 MiB 54%
JavaScript 1.3 MiB 39%
Fonts 56.8 KiB 2%
HTML 55.3 KiB 2%
Other 32.8 KiB 1%
Other 27.8 KiB 1%
Other 25.3 KiB 1%
CSS 10.0 KiB 0%
Other 780 B 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
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (3.2 MiB of 3.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4736ms total JS execution
FIX
4736ms total JS execution
Warning::
Unattributable: 1134ms CPU time
Warning::
https://www.worldhistory.org/: 711ms CPU time
Warning::
https://cdn.consentmanager.net/delivery/customdata...: 525ms CPU time
Warning::
https://ads.adthrive.com/builds/core/ac45c3e/es201...: 315ms CPU time
Warning::
https://ads.adthrive.com/builds/core/ac45c3e/gdpr/...: 279ms CPU time
Warning::
Third-party scripts: 4736ms (100% of total)

Main Thread Breakdown

Script Evaluation 56% Other 23% Script Parsing & Compilation 9% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
Unattributable1134ms288ms0ms3rd
https://www.worldhistory.org/711ms110ms17ms3rd
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfMTQzNTE2LnJfR0RQUi5sX2VuLmRfMzQ3NDIueF8xMDIudi5wLnRfMzQ3NDIueHRfMTEy.js525ms503ms10ms3rd
https://ads.adthrive.com/builds/core/ac45c3e/es2018/js/adthrive.min.js?deployment=2026-04-22-08:rpsc-799:ac45c3e:4&bucket=flex-87&deliveryFeatures=additiveRaptiveFloors,altsdm,altv2,amazonBetaApstag,consentManagerCMP,cv2,dlc,es2021,hb_crid,i262,ld,nvc,ok,pbis,raptiveFloors,raptiveManualCookieSync,recencyFrequency,reissuingSticky,removeAdHost,rpbsecs,rpr,rrassf,stickyBucketsLocalStorage,stickyV2,switzerlandGdpr,trafficShaping,usdk,prebidLoad,gptLoad,amazonLoad,ttdSync&siteid=65a6e420255ef424515e267b315ms157ms151ms3rd
https://ads.adthrive.com/builds/core/ac45c3e/gdpr/vendor/prebid/es2018/prebid.min.js279ms227ms38ms3rd
https://c.aps.amazon-adsystem.com/apstag.js252ms190ms39ms3rd
https://www.googletagmanager.com/gtag/js?id=G-DMCY1BLGCJ242ms156ms44ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js223ms179ms43ms3rd
https://www.worldhistory.org/cdn-cgi/challenge-platform/scripts/jsd/main.js222ms205ms3ms3rd
https://cdn.jsdelivr.net/npm/jquery@3.6.1/dist/jquery.min.js196ms81ms9ms3rd

Showing top 10 of 15 scripts

F
JS Bundles
Action
22 scripts, 582 KB unused
FIX
22 scripts, 582 KB unused
Warning::
https://ads.adthrive.com/builds/core/ac45c3e/es201...: 177 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 140 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ads.adthrive.com/builds/core/ac45c3e/gdpr/...: 117 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DMCY...: 63 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c.aps.amazon-adsystem.com/apstag.js: 50 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 582 KB
582 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ads.adthrive.com/builds/core/ac45c3e/es2018/js/adthrive.min.js?deployment=2026-04-22-08:rpsc-799:ac45c3e:4&bucket=flex-87&deliveryFeatures=additiveRaptiveFloors,altsdm,altv2,amazonBetaApstag,consentManagerCMP,cv2,dlc,es2021,hb_crid,i262,ld,nvc,ok,pbis,raptiveFloors,raptiveManualCookieSync,recencyFrequency,reissuingSticky,removeAdHost,rpbsecs,rpr,rrassf,stickyBucketsLocalStorage,stickyV2,switzerlandGdpr,trafficShaping,usdk,prebidLoad,gptLoad,amazonLoad,ttdSync&siteid=65a6e420255ef424515e267b371 KB177 KB (48%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB140 KB (74%)✓3rd
https://ads.adthrive.com/builds/core/ac45c3e/gdpr/vendor/prebid/es2018/prebid.min.js159 KB117 KB (73%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-DMCY1BLGCJ174 KB63 KB (36%)✓3rd
https://c.aps.amazon-adsystem.com/apstag.js78 KB50 KB (64%)✓3rd
https://cdn.consentmanager.net/delivery/js/cmp_final.min.js101 KB36 KB (36%)✓3rd
https://www.worldhistory.org/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?12 KB—✓3rd
https://www.worldhistory.org/ajax/visitor-info.js.php?v=17761703720 KB—✓3rd
https://www.worldhistory.org/js/kwicks.min.2.2.1.js3 KB—✓3rd
https://www.worldhistory.org/js/deferred-min.js?v=177617037212 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

F
Page Weight Inventory
Action
107 resources · 3.2 MB · 582 KB savings available
FIX
107 resources · 3.2 MB · 582 KB savings available
Warning::
Page weight 2.2 MB over 1MB target
Got: 3.2 MB Expected: ≤ 1 MB
Info::
~582 KB of savings available
Warning::
106 third-party resources (100% of weight)
Info::
3 resources over 200KB
107 resources · 3.2 MiB · 106 third-party 2.2 MiB over 1MB target
Image 54% · 1.7 MiB
JavaScript 40% · 1.3 MiB
Other 2% · 78.7 KiB
Font 2% · 56.8 KiB
Document 2% · 55.7 KiB
CSS 0% · 10.0 KiB

~582.0 KiB of savings available

Remove unused JavaScript: 582.0 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
35 images, 0 KB saveable
REVIEW
35 images, 0 KB saveable
Warning::
https://widgets.guidestar.org/prod/v1/pdp/transpar... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.worldhistory.org/template/images/app/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://files.worldhistory.org/Images/Forsaken_14t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.worldhistory.org/template/images/app/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
35 images 1.7 MB
0 oversized -0 KB
29 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

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
2 fonts (57 KB)
PASS
2 fonts (57 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

57 KB total

Render-blocking

0

of 2

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 6.0 s 7.0 s FCP 2.7 s LCP 7.1 shttps://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUje6bmMorHA.woff2qkB9XvYC6trAT55ZBi1ueQV... https://fonts.gstatic.com/s/karla/v33/qkB9XvYC6trAT55ZBi1ueQVIjQTD-JrIH2G7nytkHRyQ8p4wUje6bmMorHA.woff2 — 23.7 KiB — 40 ms — font-display: swaphttps://fonts.gstatic.com/s/librebaskerville/v24/kmKnZrc3Hgbbcjq75U4uslyuy4kn0qNZaxMaC82U.woff2kmKnZrc3Hgbbcjq75U4usly... https://fonts.gstatic.com/s/librebaskerville/v24/kmKnZrc3Hgbbcjq75U4uslyuy4kn0qNZaxMaC82U.woff2 — 33.1 KiB — 50 ms — font-display: swap
qkB9XvYC6trAT55ZBi1ueQV... woff2 swap
Size 24 KB
Load time 40 ms
Start 336 ms
Risk FOUT — text flashes from fallback to web font
kmKnZrc3Hgbbcjq75U4usly... woff2 swap
Size 33 KB
Load time 50 ms
Start 336 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
3
preload
1
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
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

Network Waterfall
107 requests over 6208ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 2.7 s LCP 7.1 shttps://worldhistory.org// https://worldhistory.org/ — 301 — 194 B — 63 ms — h2https://www.worldhistory.org/www.worldhistory.org/ https://www.worldhistory.org/ — 200 — 55.3 KiB — 78 ms — h2https://www.worldhistory.org/template/images/bg_timeline.pngwww.worldhistory.org/template/image... https://www.worldhistory.org/template/images/bg_timeline.png — 200 — 1.4 KiB — 29 ms — h2https://www.worldhistory.org/ajax/visitor-info.js.php?v=1776170372www.worldhistory.org/ajax/visitor-i... https://www.worldhistory.org/ajax/visitor-info.js.php?v=1776170372 — 200 — 343 B — 420 ms — h2https://cdn.jsdelivr.net/npm/jquery@3.6.1/dist/jquery.min.jscdn.jsdelivr.net/npm/jquery@3.6.1/d... https://cdn.jsdelivr.net/npm/jquery@3.6.1/dist/jquery.min.js — 200 — 31.7 KiB — 46 ms — h2https://www.worldhistory.org/js/ahe-min.js?v=1776170372www.worldhistory.org/js/ahe-min.js?... https://www.worldhistory.org/js/ahe-min.js?v=1776170372 — 200 — 19.9 KiB — 31 ms — h2https://www.worldhistory.org/analytics/pageview.js?v=1776170372www.worldhistory.org/analytics/page... https://www.worldhistory.org/analytics/pageview.js?v=1776170372 — 200 — 2.0 KiB — 30 ms — h2https://www.worldhistory.org/js/kwicks.min.2.2.1.jswww.worldhistory.org/js/kwicks.min.... https://www.worldhistory.org/js/kwicks.min.2.2.1.js — 200 — 3.3 KiB — 28 ms — h2https://fonts.googleapis.com/css?family=Karla:400,700|Libre+Baskerville:400,400i,700&subset=latin-ext&display=swapfonts.googleapis.com/css?family=Kar... https://fonts.googleapis.com/css?family=Karla:400,700|Libre+Baskerville:400,400i,700&subset=latin-ext&display=swap — 200 — 1.0 KiB — 94 ms — h2https://www.worldhistory.org/app-manifest.json?v=1776170372www.worldhistory.org/app-manifest.j... https://www.worldhistory.org/app-manifest.json?v=1776170372 — 200 — 780 B — 59 ms — h3https://www.googletagmanager.com/gtag/js?id=G-DMCY1BLGCJwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-DMCY1BLGCJ — 200 — 174.2 KiB — 171 ms — h2https://tracker.metricool.com/c3po.jpg?hash=583da8995f3bf53448b13ddf790ada6ctracker.metricool.com/c3po.jpg?hash... https://tracker.metricool.com/c3po.jpg?hash=583da8995f3bf53448b13ddf790ada6c — 200 — 2.9 KiB — 116 ms — h3https://www.worldhistory.org/template/images/whe_square_white.svgwww.worldhistory.org/template/image... https://www.worldhistory.org/template/images/whe_square_white.svg — 200 — 1.6 KiB — 27 ms — h3https://www.worldhistory.org/images/google_preferred_source_badge_2x.pngwww.worldhistory.org/images/google_... https://www.worldhistory.org/images/google_preferred_source_badge_2x.png — 200 — 10.3 KiB — 57 ms — h3https://www.worldhistory.org/images/anthem-24-silver-winnner.pngwww.worldhistory.org/images/anthem-... https://www.worldhistory.org/images/anthem-24-silver-winnner.png — 200 — 17.8 KiB — 98 ms — h3https://www.worldhistory.org/images/ahe-webaward-200x200.pngwww.worldhistory.org/images/ahe-web... https://www.worldhistory.org/images/ahe-webaward-200x200.png — 200 — 9.8 KiB — 83 ms — h3https://www.worldhistory.org/images/lovie-award-badge.pngwww.worldhistory.org/images/lovie-a... https://www.worldhistory.org/images/lovie-award-badge.png — 200 — 7.0 KiB — 75 ms — h3https://www.worldhistory.org/images/reimagine-edu-shortlisted.pngwww.worldhistory.org/images/reimagi... https://www.worldhistory.org/images/reimagine-edu-shortlisted.png — 200 — 28.3 KiB — 116 ms — h3https://www.worldhistory.org/images/award-tutorful-200px.pngwww.worldhistory.org/images/award-t... https://www.worldhistory.org/images/award-tutorful-200px.png — 200 — 10.2 KiB — 82 ms — h3https://www.worldhistory.org/images/tutorhouse.pngwww.worldhistory.org/images/tutorho... https://www.worldhistory.org/images/tutorhouse.png — 200 — 18.3 KiB — 98 ms — h3https://storage.googleapis.com/goodpods-images-bucket/leaderboard_badges/history_all-history_top50_month.pngstorage.googleapis.com/goodpods-ima... https://storage.googleapis.com/goodpods-images-bucket/leaderboard_badges/history_all-history_top50_month.png — 200 — 18.2 KiB — 234 ms — h2https://widgets.guidestar.org/prod/v1/pdp/transparency-seal/15451557/svgwidgets.guidestar.org/prod/v1/pdp/t... https://widgets.guidestar.org/prod/v1/pdp/transparency-seal/15451557/svg — 200 — 4.4 KiB — 333 ms — h2https://files.worldhistory.org/Images/Forsaken_14th_Century/mockup_forsaken_14th_century_600px.pngfiles.worldhistory.org/Images/Forsa... https://files.worldhistory.org/Images/Forsaken_14th_Century/mockup_forsaken_14th_century_600px.png — 200 — 424.7 KiB — 202 ms — h3https://www.worldhistory.org/template/images/membership/membership-sidetab-en.svg?v=1776170372www.worldhistory.org/template/image... https://www.worldhistory.org/template/images/membership/membership-sidetab-en.svg?v=1776170372 — 200 — 2.8 KiB — 63 ms — h3https://www.worldhistory.org/template/images/app/button_app_store.pngwww.worldhistory.org/template/image... https://www.worldhistory.org/template/images/app/button_app_store.png — 200 — 4.0 KiB — 67 ms — h3https://www.worldhistory.org/template/images/app/button_google_play.pngwww.worldhistory.org/template/image... https://www.worldhistory.org/template/images/app/button_google_play.png — 200 — 6.9 KiB — 78 ms — h3https://www.worldhistory.org/template/css/exclude/deferred.css?v=1776170372www.worldhistory.org/template/css/e... https://www.worldhistory.org/template/css/exclude/deferred.css?v=1776170372 — 200 — 6.2 KiB — 78 ms — h3https://www.worldhistory.org/img/c/p/360x202/21757.png?v=1776868586-1776868754www.worldhistory.org/img/c/p/360x20... https://www.worldhistory.org/img/c/p/360x202/21757.png?v=1776868586-1776868754 — 200 — 53.4 KiB — 150 ms — h3https://www.worldhistory.org/img/c/p/360x202/21756.png?v=1776868288-1776868359www.worldhistory.org/img/c/p/360x20... https://www.worldhistory.org/img/c/p/360x202/21756.png?v=1776868288-1776868359 — 200 — 60.5 KiB — 144 ms — h3https://www.worldhistory.org/img/c/p/360x202/21755.png?v=1776867974-1776868021www.worldhistory.org/img/c/p/360x20... https://www.worldhistory.org/img/c/p/360x202/21755.png?v=1776867974-1776868021 — 200 — 69.6 KiB — 145 ms — h3
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h2https://c.amazon-adsystem.com/cdn/prod/config?src=600&u=https%3A%2F%2Fwww.worldhistory.org&pubid=4fbba76f-7987-4fa2-9733-c27eb3a2170bc.amazon-adsystem.com/cdn/prod/conf... https://c.amazon-adsystem.com/cdn/prod/config?src=600&u=https%3A%2F%2Fwww.worldhistory.org&pubid=4fbba76f-7987-4fa2-9733-c27eb3a2170b — 200 — 1.5 KiB — 39 ms — h2https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.jssecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js — 200 — 187.7 KiB — 71 ms — h3https://gum.criteo.com/sid/json?origin=prebid&topUrl=https%3A%2F%2Fwww.worldhistory.org%2F&domain=www.worldhistory.org&cw=1&lsw=1gum.criteo.com/sid/json?origin=preb... https://gum.criteo.com/sid/json?origin=prebid&topUrl=https%3A%2F%2Fwww.worldhistory.org%2F&domain=www.worldhistory.org&cw=1&lsw=1 — 200 — 379 B — 55 ms — h2https://eu-us.consentmanager.net/delivery/info/?id=143516&did=1&cfdid=1&t=pv.d_ncs.d_ancs.d_bncs.cv&h=https%3A%2F%2Fwww.worldhistory.org%2F&o=1776890456675&l=EN&lv=103409&d=1&ct=14&e=&e2=&e3=&i=&sv=112&dv=102&eu-us.consentmanager.net/delivery/i... https://eu-us.consentmanager.net/delivery/info/?id=143516&did=1&cfdid=1&t=pv.d_ncs.d_ancs.d_bncs.cv&h=https%3A%2F%2Fwww.worldhistory.org%2F&o=1776890456675&l=EN&lv=103409&d=1&ct=14&e=&e2=&e3=&i=&sv=112&dv=102& — -1 — 0 B — 3.1 s — https://eu-us-cdn.consentmanager.net/delivery/flags/en.gifeu-us-cdn.consentmanager.net/delive... https://eu-us-cdn.consentmanager.net/delivery/flags/en.gif — 200 — 816 B — 67 ms — h2https://api.id5-sync.com/analytics/367/id5-api-jsapi.id5-sync.com/analytics/367/id5-... https://api.id5-sync.com/analytics/367/id5-api-js — 200 — 691 B — 103 ms — h2https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gptsecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gpt — 200 — 23.0 KiB — 38 ms — h3https://region1.google-analytics.com/g/collect?v=2&tid=G-DMCY1BLGCJ&gtm=45je64k1h2v879717329za200zd879717329&_p=1776890455607&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&tcfd=1000h&gdid=dMzk4MW&ecid=1393158737&_eu=AAAAAEA&_prs=gs&are=1&cid=578510056.1776890457&ec_mode=a&frm=0&pscdl=denied&rcb=11&sr=412x823&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=0~115938465~115938468~117266400~117512542&sid=1776890456&sct=1&seg=0&dl=https%3A%2F%2Fwww.worldhistory.org%2F&dt=World%20History%20Encyclopedia&en=page_view&_fv=1&_nsi=1&_ss=2&_ee=1&ep.anonymize_ip=true&ep.ab=a&ep.ci_language=en&epn.user_known=0&ep.user_engagement=none&epn.user_member=0&epn.user_logged_in=0&epn.user_donor=0&ep.ci_type_id=(none)&ep.acq_referrer=(direct)&ep.acq_source=(none)&ep.acq_medium=(none)&ep.acq_campaign=(none)&up.ab=a&up.engagement=none&upn.known=0&up.user_group=unknown&tfd=1824region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-DMCY1BLGCJ&gtm=45je64k1h2v879717329za200zd879717329&_p=1776890455607&gcs=G100&gcd=13p3pPp2p5l1&npa=1&dma_cps=-&dma=1&tcfd=1000h&gdid=dMzk4MW&ecid=1393158737&_eu=AAAAAEA&_prs=gs&are=1&cid=578510056.1776890457&ec_mode=a&frm=0&pscdl=denied&rcb=11&sr=412x823&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=0~115938465~115938468~117266400~117512542&sid=1776890456&sct=1&seg=0&dl=https%3A%2F%2Fwww.worldhistory.org%2F&dt=World%20History%20Encyclopedia&en=page_view&_fv=1&_nsi=1&_ss=2&_ee=1&ep.anonymize_ip=true&ep.ab=a&ep.ci_language=en&epn.user_known=0&ep.user_engagement=none&epn.user_member=0&epn.user_logged_in=0&epn.user_donor=0&ep.ci_type_id=(none)&ep.acq_referrer=(direct)&ep.acq_source=(none)&ep.acq_medium=(none)&ep.acq_campaign=(none)&up.ab=a&up.engagement=none&upn.known=0&up.user_group=unknown&tfd=1824 — 204 — 553 B — 99 ms — h2https://id5-sync.com/bounceid5-sync.com/bounce https://id5-sync.com/bounce — 200 — 528 B — 29 ms — h2https://lbs.eu-1-id5-sync.com/lbs/v1lbs.eu-1-id5-sync.com/lbs/v1 https://lbs.eu-1-id5-sync.com/lbs/v1 — 200 — 165 B — 111 ms — h2https://lb.eu-1-id5-sync.com/lb/v1lb.eu-1-id5-sync.com/lb/v1 https://lb.eu-1-id5-sync.com/lb/v1 — 200 — 350 B — 112 ms — h2https://d0.eu-3-id5-sync.com/d0.eu-3-id5-sync.com/ https://d0.eu-3-id5-sync.com/ — 200 — 143 B — 103 ms — h2https://d1.eu-3-id5-sync.com/d1.eu-3-id5-sync.com/ https://d1.eu-3-id5-sync.com/ — 200 — 143 B — 100 ms — h2https://d2.eu-3-id5-sync.com/d2.eu-3-id5-sync.com/ https://d2.eu-3-id5-sync.com/ — 200 — 143 B — 101 ms — h2https://d3.eu-3-id5-sync.com/d3.eu-3-id5-sync.com/ https://d3.eu-3-id5-sync.com/ — 200 — 143 B — 90 ms — h2https://d4.eu-3-id5-sync.com/d4.eu-3-id5-sync.com/ https://d4.eu-3-id5-sync.com/ — 200 — 143 B — 98 ms — h2https://d5.eu-3-id5-sync.com/d5.eu-3-id5-sync.com/ https://d5.eu-3-id5-sync.com/ — 200 — 143 B — 99 ms — h2https://d6.eu-3-id5-sync.com/d6.eu-3-id5-sync.com/ https://d6.eu-3-id5-sync.com/ — 200 — 143 B — 104 ms — h2https://d7.eu-3-id5-sync.com/d7.eu-3-id5-sync.com/ https://d7.eu-3-id5-sync.com/ — 200 — 143 B — 84 ms — h2https://d0.eu-4-id5-sync.com/d0.eu-4-id5-sync.com/ https://d0.eu-4-id5-sync.com/ — 200 — 143 B — 109 ms — h2https://d1.eu-4-id5-sync.com/d1.eu-4-id5-sync.com/ https://d1.eu-4-id5-sync.com/ — 200 — 143 B — 100 ms — h2https://d2.eu-4-id5-sync.com/d2.eu-4-id5-sync.com/ https://d2.eu-4-id5-sync.com/ — 200 — 143 B — 110 ms — h2https://d3.eu-4-id5-sync.com/d3.eu-4-id5-sync.com/ https://d3.eu-4-id5-sync.com/ — 200 — 143 B — 104 ms — h2https://d4.eu-4-id5-sync.com/d4.eu-4-id5-sync.com/ https://d4.eu-4-id5-sync.com/ — 200 — 143 B — 101 ms — h2https://d5.eu-4-id5-sync.com/d5.eu-4-id5-sync.com/ https://d5.eu-4-id5-sync.com/ — 200 — 143 B — 106 ms — h2https://d6.eu-4-id5-sync.com/d6.eu-4-id5-sync.com/ https://d6.eu-4-id5-sync.com/ — 200 — 143 B — 104 ms — h2https://d7.eu-4-id5-sync.com/d7.eu-4-id5-sync.com/ https://d7.eu-4-id5-sync.com/ — 200 — 143 B — 110 ms — h2https://id5-sync.com/gm/v3id5-sync.com/gm/v3 https://id5-sync.com/gm/v3 — 200 — 843 B — 27 ms — h2https://www.worldhistory.org/cdn-cgi/rum?www.worldhistory.org/cdn-cgi/rum? https://www.worldhistory.org/cdn-cgi/rum? — 204 — 272 B — 21 ms — h3https://www.worldhistory.org/template/images/whe-favicon-32px.pngwww.worldhistory.org/template/image... https://www.worldhistory.org/template/images/whe-favicon-32px.png — 200 — 892 B — 25 ms — h3https://www.worldhistory.org/template/images/whe-favicon-192px.pngwww.worldhistory.org/template/image... https://www.worldhistory.org/template/images/whe-favicon-192px.png — 200 — 3.5 KiB — 26 ms — h3https://www.worldhistory.org/analytics/www.worldhistory.org/analytics/ https://www.worldhistory.org/analytics/ — 200 — 405 B — 426 ms — h3
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 4736ms · 1288KB · €76/mo
Unattributable
Other
Costly
Execution 1134ms
Transfer 0 KB
Monthly Cost €18/mo
www.worldhistory.org
Other
Costly
Execution 711ms
Transfer 55 KB
Monthly Cost €11/mo
cdn.consentmanager.net
Other
Costly
Execution 525ms
Transfer 22 KB
Monthly Cost €8/mo
ads.adthrive.com
Other
Costly
Execution 315ms
Transfer 371 KB
Unused 48%
Monthly Cost €5/mo
ads.adthrive.com
Other
Costly
Execution 279ms
Transfer 159 KB
Unused 73%
Monthly Cost €4/mo
c.aps.amazon-adsystem.com
Other
Costly
Execution 252ms
Transfer 78 KB
Unused 64%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 242ms
Transfer 174 KB
Unused 36%
Monthly Cost €4/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 223ms
Transfer 188 KB
Unused 74%
Monthly Cost €4/mo
www.worldhistory.org
Other
Costly
Execution 222ms
Transfer 0 KB
Monthly Cost €4/mo
jsDelivr
CDN
Optional
Execution 196ms
Transfer 32 KB
Monthly Cost €3/mo
static.cloudflareinsights.com
Other
Optional
Execution 196ms
Transfer 11 KB
Monthly Cost €3/mo
ads.adthrive.com
Other
Optional
Execution 181ms
Transfer 34 KB
Monthly Cost €3/mo
cdn.id5-sync.com
Other
Optional
Execution 92ms
Transfer 30 KB
Monthly Cost €1/mo
cdn.consentmanager.net
Other
Optional
Execution 85ms
Transfer 101 KB
Unused 36%
Monthly Cost €1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 84ms
Transfer 34 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1134ms and costs ~€18/month
  • www.worldhistory.org adds 711ms and costs ~€11/month
  • cdn.consentmanager.net adds 525ms and costs ~€8/month
  • ads.adthrive.com adds 315ms and costs ~€5/month
  • ads.adthrive.com adds 279ms and costs ~€4/month
  • c.aps.amazon-adsystem.com adds 252ms and costs ~€4/month
  • Google Tag Manager adds 242ms and costs ~€4/month
  • securepubads.g.doubleclick.net adds 223ms and costs ~€4/month
  • www.worldhistory.org adds 222ms and costs ~€4/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

Unattributable takes 1134ms 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

www.worldhistory.org takes 711ms 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.consentmanager.net takes 525ms 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

ads.adthrive.com takes 315ms 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

ads.adthrive.com takes 279ms 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

73% of ads.adthrive.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

c.aps.amazon-adsystem.com takes 252ms 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

64% of c.aps.amazon-adsystem.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

Google Tag Manager takes 242ms 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

securepubads.g.doubleclick.net takes 223ms 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

74% of securepubads.g.doubleclick.net'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.worldhistory.org takes 222ms 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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