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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
36
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
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.

2.80 s

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

26.69 s

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

1.17 s

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

0.168

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

5.12 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.

30.48 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 2 REVIEW 5 FIX
F
Page Weight Budget
Action
5.6 MB transferred, 51 requests
FIX
5.6 MB transferred, 51 requests
Critical::
Page weighs 8.8 MB (5.6 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 971 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 971 KB
Info::
51 HTTP requests
Info::
Estimated 1.2 g CO2 per page load
5.6 MB / 2.4 MB budget
5.6 MB transferred
51 requests
1.2 g CO2 per page load
Images 4.5 MiB 81%
JavaScript 971.0 KiB 17%
HTML 46.9 KiB 1%
Other 44.4 KiB 1%
Fonts 30.5 KiB 1%
Other 15.6 KiB 0%
Other 4.6 KiB 0%
Other 737 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

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 (5.6 MiB of 5.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4132ms total JS execution
FIX
4132ms total JS execution
Warning::
https://www.warnerbros.com/main.4e873d21.js: 1709ms CPU time
Warning::
https://www.warnerbros.com/: 492ms CPU time
Warning::
https://www.warnerbros.com/templates/vendors~main....: 474ms CPU time
Warning::
Unattributable: 467ms CPU time
Warning::
https://cdn.cookielaw.org/scripttemplates/202505.2...: 327ms CPU time
Warning::
Third-party scripts: 4132ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Style & Layout 16% Other 15% Script Parsing & Compilation 10%
ScriptTotalScriptingParse/CompileParty
https://www.warnerbros.com/main.4e873d21.js1709ms1326ms8ms3rd
https://www.warnerbros.com/492ms13ms23ms3rd
https://www.warnerbros.com/templates/vendors~main.9d050e9f.js474ms123ms105ms3rd
Unattributable467ms105ms0ms3rd
https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js327ms238ms40ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NVM2N7H280ms221ms45ms3rd
https://www.warnerbros.com/templates/__react_static_root__/src/layout/home/HomeTwoLayout.tsx.9e7a3ad7.js156ms87ms32ms3rd
https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~11170e23.adb9d838.js93ms1ms92ms3rd
https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~dfbe08eb.e74f5e94.js74ms63ms1ms3rd
https://www.warnerbros.com/templates/__react_static_root__/src/layout/title-landing/TitleLandingLayout.tsx.17e9cb7c.js59ms22ms37ms3rd
D
JS Bundles
Action
12 scripts, 405 KB unused
FIX
12 scripts, 405 KB unused
Warning::
https://www.warnerbros.com/templates/__react_stati...: 87 KB unused (93%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.warnerbros.com/templates/vendors~__rea...: 86 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.warnerbros.com/templates/vendors~main....: 71 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-NVM...: 68 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202505.2...: 62 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 405 KB
405 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.warnerbros.com/templates/__react_static_root__/src/layout/title-landing/TitleLandingLayout.tsx.17e9cb7c.js94 KB87 KB (93%)✓3rd
https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~11170e23.adb9d838.js166 KB86 KB (55%)✓3rd
https://www.warnerbros.com/templates/vendors~main.9d050e9f.js291 KB71 KB (24%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-NVM2N7H130 KB68 KB (52%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202505.2.0/otBannerSdk.js119 KB62 KB (52%)✓3rd
https://www.warnerbros.com/templates/__react_static_root__/src/layout/home/HomeTwoLayout.tsx.9e7a3ad7.js84 KB31 KB (37%)✓3rd
https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~80d76e5e.c688ba8d.js30 KB—✓3rd
https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~dfbe08eb.e74f5e94.js2 KB—✓3rd
https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/home/HomeTwoLayout.tsx.a7c27a94.js15 KB—✓3rd
https://www.warnerbros.com/main.4e873d21.js27 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
51 resources · 5.6 MB · 405 KB savings available
FIX
51 resources · 5.6 MB · 405 KB savings available
Warning::
Page weight 4.6 MB over 1MB target
Got: 5.6 MB Expected: ≤ 1 MB
Info::
~405 KB of savings available
Warning::
50 third-party resources (100% of weight)
Info::
4 resources over 200KB
51 resources · 5.6 MiB · 50 third-party 4.6 MiB over 1MB target
Image 81% · 4.5 MiB
JavaScript 17% · 971.0 KiB
Document 1% · 47.5 KiB
Other 1% · 44.2 KiB
Font 1% · 30.5 KiB
CSS 0% · 4.5 KiB

~405.2 KiB of savings available

Remove unused JavaScript: 405.2 KiB
B
Image Optimization
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
https://www.warnerbros.com/assets/images/home/wb/l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
22 images 4.5 MB
0 oversized -0 KB
21 legacy format
1 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

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+
Font Loading
1 fonts (31 KB)
PASS
1 fonts (31 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

31 KB total

Render-blocking

0

of 1

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 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s FCP 2.8 s LCP 26.7 shttps://www.warnerbros.com/static/MontserratFont.d5de368a.woff2MontserratFont.d5de368a... https://www.warnerbros.com/static/MontserratFont.d5de368a.woff2 — 30.5 KiB — 81 ms — font-display: swap
MontserratFont.d5de368a... woff2 swap
Size 31 KB
Load time 81 ms
Start 622 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
12 hints, 0 missing preconnects
PASS
12 hints, 0 missing preconnects
Info::
Page uses 12 resource hint(s)

Current Resource Hints

preconnect
—
preload
+2
12
dns-prefetch
—
prefetch
—

12 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
HTTP Caching
max-age=600 (10 minutes)
PASS
max-age=600 (10 minutes)
Info::
Cache-Control header is set
Got: max-age=600
Info::
Effective TTL: 10 minutes (max-age=600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=600

DirectiveValueMeaning
max-age600Cache for 10 minutes
Effective TTL: 600 seconds
Network Waterfall
51 requests over 2976ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s FCP 2.8 s LCP 26.7 shttps://warnerbros.com// https://warnerbros.com/ — 301 — 150 B — 528 ms — h2http://www.warnerbros.com/www.warnerbros.com/ http://www.warnerbros.com/ — 307 — 0 B — 1 ms — http/1.1https://www.warnerbros.com/www.warnerbros.com/ https://www.warnerbros.com/ — 200 — 46.9 KiB — 78 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~80d76e5e.c688ba8d.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~80d76e5e.c688ba8d.js — 200 — 29.6 KiB — 56 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~11170e23.adb9d838.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~11170e23.adb9d838.js — 200 — 166.3 KiB — 49 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~dfbe08eb.e74f5e94.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~dfbe08eb.e74f5e94.js — 200 — 2.0 KiB — 54 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/home/HomeTwoLayout.tsx.a7c27a94.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/home/HomeTwoLayout.tsx.a7c27a94.js — 200 — 14.7 KiB — 61 ms — h2https://www.warnerbros.com/templates/__react_static_root__/src/layout/home/HomeTwoLayout.tsx.9e7a3ad7.jswww.warnerbros.com/templates/__reac... https://www.warnerbros.com/templates/__react_static_root__/src/layout/home/HomeTwoLayout.tsx.9e7a3ad7.js — 200 — 84.0 KiB — 61 ms — h2https://www.warnerbros.com/templates/vendors~main.9d050e9f.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~main.9d050e9f.js — 200 — 291.1 KiB — 87 ms — h2https://www.warnerbros.com/main.4e873d21.jswww.warnerbros.com/main.4e873d21.js https://www.warnerbros.com/main.4e873d21.js — 200 — 26.6 KiB — 86 ms — h2https://www.warnerbros.com/assets/images/home/wb/logo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/wb/logo.png — 200 — 37.8 KiB — 88 ms — h2https://www.warnerbros.com/assets/images/home/comedy/logo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/comedy/logo.png — 200 — 102.6 KiB — 88 ms — h2https://www.warnerbros.com/assets/images/home/horror/logo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/horror/logo.png — 200 — 156.0 KiB — 90 ms — h2https://www.warnerbros.com/assets/images/home/epics/logo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/epics/logo.png — 200 — 252.4 KiB — 92 ms — h2https://www.warnerbros.com/assets/images/home/comedy/clogo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/comedy/clogo.png — 200 — 243.4 KiB — 93 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-NVM2N7Hwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-NVM2N7H — 200 — 130.0 KiB — 170 ms — h2https://www.warnerbros.com/static/MontserratFont.d5de368a.woff2www.warnerbros.com/static/Montserra... https://www.warnerbros.com/static/MontserratFont.d5de368a.woff2 — 200 — 30.5 KiB — 81 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAKQ2lDQ1BJQ0MgcHJvZmlsZQAAeNqdU…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAKQ2lDQ1BJQ0MgcHJvZmlsZQAAeNqdU… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAKQ2lDQ1BJQ0MgcHJvZmlsZQAAeNqdU…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAKQ2lDQ1BJQ0MgcHJvZmlsZQAAeNqdU… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAKQ2lDQ1BJQ0MgcHJvZmlsZQAAeNqdU…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAaCAYAAACpSkzOAAAKQ2lDQ1BJQ0MgcHJvZmlsZQAAeNqdU… — 200 — 0 B — 0 ms — datahttps://www.warnerbros.com/assets/images/home/bg_mobile.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/bg_mobile.png — 200 — 3.6 MiB — 550 ms — h2https://www.warnerbros.com/assets/manifest.jsonwww.warnerbros.com/assets/manifest.... https://www.warnerbros.com/assets/manifest.json — 200 — 737 B — 54 ms — h2https://d2nmfu57zhrblt.cloudfront.net/d2nmfu57zhrblt.cloudfront.net/ https://d2nmfu57zhrblt.cloudfront.net/ — 200 — 506 B — 131 ms — h2https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/obaa_keyart_0.jpgirs.www.warnerbros.com/keyart-jpeg/... https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/obaa_keyart_0.jpg — 200 — 24.1 KiB — 106 ms — h2https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/wuthering_heights_keyart.jpgirs.www.warnerbros.com/keyart-jpeg/... https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/wuthering_heights_keyart.jpg — 200 — 15.9 KiB — 123 ms — h2https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/bride_keyart_0.jpgirs.www.warnerbros.com/keyart-jpeg/... https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/bride_keyart_0.jpg — 200 — 20.2 KiB — 129 ms — h2https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/they_will_kill_you_keyart_1.jpgirs.www.warnerbros.com/keyart-jpeg/... https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/they_will_kill_you_keyart_1.jpg — 200 — 18.4 KiB — 111 ms — h2https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/lee_cronins_the_mummy_keyart_0.jpgirs.www.warnerbros.com/keyart-jpeg/... https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/lee_cronins_the_mummy_keyart_0.jpg — 200 — 13.8 KiB — 112 ms — h2https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/mortla_kombat_2_keyart_0.jpgirs.www.warnerbros.com/keyart-jpeg/... https://irs.www.warnerbros.com/keyart-jpeg/movies/media/browser/mortla_kombat_2_keyart_0.jpg — 200 — 24.9 KiB — 124 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 111 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s FCP 2.8 s LCP 26.7 shttps://warnerbros.com// https://warnerbros.com/ — 301 — 150 B — 528 ms — h2http://www.warnerbros.com/www.warnerbros.com/ http://www.warnerbros.com/ — 307 — 0 B — 1 ms — http/1.1https://www.warnerbros.com/www.warnerbros.com/ https://www.warnerbros.com/ — 200 — 46.9 KiB — 78 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~80d76e5e.c688ba8d.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~80d76e5e.c688ba8d.js — 200 — 29.6 KiB — 56 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~11170e23.adb9d838.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~11170e23.adb9d838.js — 200 — 166.3 KiB — 49 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~dfbe08eb.e74f5e94.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/404/404.tsx~__react_static_root__/src/layout/articles/Artic~dfbe08eb.e74f5e94.js — 200 — 2.0 KiB — 54 ms — h2https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/home/HomeTwoLayout.tsx.a7c27a94.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~__react_static_root__/src/layout/home/HomeTwoLayout.tsx.a7c27a94.js — 200 — 14.7 KiB — 61 ms — h2https://www.warnerbros.com/templates/__react_static_root__/src/layout/home/HomeTwoLayout.tsx.9e7a3ad7.jswww.warnerbros.com/templates/__reac... https://www.warnerbros.com/templates/__react_static_root__/src/layout/home/HomeTwoLayout.tsx.9e7a3ad7.js — 200 — 84.0 KiB — 61 ms — h2https://www.warnerbros.com/templates/vendors~main.9d050e9f.jswww.warnerbros.com/templates/vendor... https://www.warnerbros.com/templates/vendors~main.9d050e9f.js — 200 — 291.1 KiB — 87 ms — h2https://www.warnerbros.com/main.4e873d21.jswww.warnerbros.com/main.4e873d21.js https://www.warnerbros.com/main.4e873d21.js — 200 — 26.6 KiB — 86 ms — h2https://www.warnerbros.com/assets/images/home/wb/logo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/wb/logo.png — 200 — 37.8 KiB — 88 ms — h2https://www.warnerbros.com/assets/images/home/comedy/logo.pngwww.warnerbros.com/assets/images/ho... https://www.warnerbros.com/assets/images/home/comedy/logo.png — 200 — 102.6 KiB — 88 ms — 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h2https://cdn.cookielaw.org/consent/4fdc2e6f-747b-41b3-bead-03f591f6806b/019984c6-1ed0-77cf-8fc4-5c07c20cde91/en.jsoncdn.cookielaw.org/consent/4fdc2e6f-... https://cdn.cookielaw.org/consent/4fdc2e6f-747b-41b3-bead-03f591f6806b/019984c6-1ed0-77cf-8fc4-5c07c20cde91/en.json — 200 — 22.9 KiB — 46 ms — h2https://cdn.cookielaw.org/scripttemplates/202505.2.0/assets/otCenterRounded.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202505.2.0/assets/otCenterRounded.json — 200 — 2.9 KiB — 34 ms — h2https://cdn.cookielaw.org/scripttemplates/202505.2.0/assets/v2/otPcCenter.jsoncdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202505.2.0/assets/v2/otPcCenter.json — 200 — 13.0 KiB — 35 ms — h2https://cdn.cookielaw.org/scripttemplates/202505.2.0/assets/otCommonStyles.csscdn.cookielaw.org/scripttemplates/2... https://cdn.cookielaw.org/scripttemplates/202505.2.0/assets/otCommonStyles.css — 200 — 4.5 KiB — 34 ms — 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https://www.googletagmanager.com/a?id=GTM-NVM2N7H&v=3&t=t&pid=1719473256&gtm=45He64h1v79529941za200zd79529941&cv=119&rv=64h1&tc=46&tag_exp=0~115616985~115938465~115938468~117266400&es=1&e=*&eid=12&u=Ag&h=Ag&z=0 — 200 — 11 B — 25 ms — h3https://www.googletagmanager.com/a?id=GTM-NVM2N7H&v=3&t=t&pid=1719473256&gtm=45He64h1v79529941za200zd79529941&cv=119&rv=64h1&tc=46&tag_exp=0~115616985~115938465~115938468~117266400&es=1&e=*&eid=13&u=Ag&h=Ag&z=0www.googletagmanager.com/a?id=GTM-N... https://www.googletagmanager.com/a?id=GTM-NVM2N7H&v=3&t=t&pid=1719473256&gtm=45He64h1v79529941za200zd79529941&cv=119&rv=64h1&tc=46&tag_exp=0~115616985~115938465~115938468~117266400&es=1&e=*&eid=13&u=Ag&h=Ag&z=0 — 200 — 11 B — 25 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 4132ms · 960KB · $71/mo
www.warnerbros.com
Other
Costly
Execution 1709ms
Transfer 27 KB
Monthly Cost $30/mo
www.warnerbros.com
Other
Costly
Execution 492ms
Transfer 47 KB
Monthly Cost $8/mo
www.warnerbros.com
Other
Costly
Execution 474ms
Transfer 291 KB
Unused 24%
Monthly Cost $8/mo
Unattributable
Other
Costly
Execution 467ms
Transfer 0 KB
Monthly Cost $8/mo
OneTrust
Consent
Essential
Execution 327ms
Transfer 119 KB
Unused 52%
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 280ms
Transfer 130 KB
Unused 52%
Monthly Cost $5/mo
www.warnerbros.com
Other
Optional
Execution 156ms
Transfer 84 KB
Unused 37%
Monthly Cost $3/mo
www.warnerbros.com
Other
Optional
Execution 93ms
Transfer 166 KB
Unused 55%
Monthly Cost $2/mo
www.warnerbros.com
Other
Optional
Execution 74ms
Transfer 2 KB
Monthly Cost $1/mo
www.warnerbros.com
Other
Optional
Execution 59ms
Transfer 94 KB
Unused 93%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.warnerbros.com adds 1709ms and costs ~$30/month
  • www.warnerbros.com adds 492ms and costs ~$8/month
  • www.warnerbros.com adds 474ms and costs ~$8/month
  • Unattributable adds 467ms and costs ~$8/month
  • Google Tag Manager adds 280ms and costs ~$5/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.warnerbros.com takes 1709ms 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.warnerbros.com takes 492ms 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.warnerbros.com takes 474ms 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 467ms 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

52% of OneTrust'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 280ms 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

52% of Google Tag Manager'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

55% of www.warnerbros.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

93% of www.warnerbros.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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