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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
32
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

6.47 s

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

18.74 s

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

1.94 s

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

0.036

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

6.47 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.

18.88 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
16
7 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
3.1 MB transferred, 110 requests
FIX
3.1 MB transferred, 110 requests
Warning::
Page weighs 9.0 MB (3.1 MB transferred)
Warning::
JavaScript is 1.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.9 MB
Warning::
110 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.64 g CO2 per page load
3.1 MB / 2.4 MB budget
3.1 MB transferred
110 requests
0.64 g CO2 per page load
JavaScript 1.9 MiB 62%
Images 829.4 KiB 27%
HTML 244.1 KiB 8%
CSS 55.5 KiB 2%
Fonts 34.4 KiB 1%
Other 8.3 KiB 0%
Other 2.9 KiB 0%
Other 2.7 KiB 0%
Other 2.4 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

Why this matters

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

Source: web.dev

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

Why this matters

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

Source: web.dev

D
Third-Party Impact
Action
92% third-party, 0 ms blocking
FIX
92% third-party, 0 ms blocking
Warning::
Third-party code accounts for 92% of page weight (2.8 MiB of 3.1 MiB)
Info::
Third-party blocking time is low (0 ms)
92%
First-party Third-party
F
JS Execution Cost
Action
6421ms total JS execution
FIX
6421ms total JS execution
Warning::
https://dqpnq362acqdi.cloudfront.net/_next/static/...: 1649ms CPU time
Warning::
https://www.imdb.com/: 1390ms CPU time
Warning::
Unattributable: 854ms CPU time
Warning::
https://fb423e1ef94f.6277d64d.us-east-1.token.awsw...: 774ms CPU time
Warning::
https://dqpnq362acqdi.cloudfront.net/_next/static/...: 741ms CPU time
Warning::
Third-party scripts: 5031ms (78% of total)

Main Thread Breakdown

Script Evaluation 55% Other 19% Script Parsing & Compilation 11% Style & Layout 8%
ScriptTotalScriptingParse/CompileParty
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/framework-a909d885f472f220.js1649ms1329ms19ms3rd
https://www.imdb.com/1390ms374ms70ms1st
Unattributable854ms139ms0ms3rd
https://fb423e1ef94f.6277d64d.us-east-1.token.awswaf.com/fb423e1ef94f/c3382d439950/916d943f6a58/challenge.js774ms585ms128ms3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/pages/_app-dd73bd2a36cf5e83.js741ms480ms255ms3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/pages/index-b5371965d127a23f.js470ms438ms10ms3rd
https://m.media-amazon.com/images/S/sash/kvqF2FJRkH$M2gg.js316ms157ms37ms3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/3065-fb972dd00eee52b1.js84ms2ms80ms3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/main-6c24c9b673722d49.js72ms59ms12ms3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/4149.60f2da6904611b6d.js70ms55ms14ms3rd
F
JS Bundles
Action
30 scripts, 941 KB unused
FIX
30 scripts, 941 KB unused
Warning::
https://dqpnq362acqdi.cloudfront.net/_next/static/...: 405 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fb423e1ef94f.6277d64d.us-east-1.token.awsw...: 278 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://dqpnq362acqdi.cloudfront.net/_next/static/...: 123 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://m.media-amazon.com/images/S/sash/kvqF2FJRk...: 49 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://dqpnq362acqdi.cloudfront.net/_next/static/...: 35 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 941 KB
941 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/pages/_app-dd73bd2a36cf5e83.js724 KB405 KB (56%)✓3rd
https://fb423e1ef94f.6277d64d.us-east-1.token.awswaf.com/fb423e1ef94f/c3382d439950/916d943f6a58/challenge.js500 KB278 KB (56%)✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/3065-fb972dd00eee52b1.js219 KB123 KB (57%)✓3rd
https://m.media-amazon.com/images/S/sash/kvqF2FJRkH$M2gg.js72 KB49 KB (69%)✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/5368-51c24bec7694a0d4.js89 KB35 KB (40%)✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/framework-a909d885f472f220.js65 KB28 KB (44%)✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/main-6c24c9b673722d49.js41 KB22 KB (55%)✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/5522-31a2f4ccbc79131f.js5 KB—✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/9031-de0d2babbcc9fa50.js6 KB—✓3rd
https://dqpnq362acqdi.cloudfront.net/_next/static/chunks/8198-8150702a7fc55b3d.js20 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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store, max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store, max-age=0

DirectiveValueMeaning
no-store—Never cache this response
max-age0Cache for 0 seconds
B
Image Optimization
46 images, 0 KB saveable
REVIEW
46 images, 0 KB saveable
Info::
All images are well-optimized
46 images 829 KB
0 oversized -0 KB
43 legacy format
0 missing dimensions CLS risk
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
3 fonts (34 KB)
PASS
3 fonts (34 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

34 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 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 FCP 6.5 s LCP 18.7 shttps://m.media-amazon.com/images/G/01/IMDb/cm9ib3Rv._TTW_.woff2cm9ib3Rv._TTW_.woff2 https://m.media-amazon.com/images/G/01/IMDb/cm9ib3Rv._TTW_.woff2 — 11.5 KiB — 0 ms — font-display: swaphttps://m.media-amazon.com/images/G/01/IMDb/cm9ib3RvTWVk._TTW_.woff2cm9ib3RvTWVk._TTW_.woff2 https://m.media-amazon.com/images/G/01/IMDb/cm9ib3RvTWVk._TTW_.woff2 — 11.5 KiB — 0 ms — font-display: swaphttps://m.media-amazon.com/images/G/01/IMDb/cm9ib3RvQm9sZA._TTW_.woff2cm9ib3RvQm9sZA._TTW_.woff2 https://m.media-amazon.com/images/G/01/IMDb/cm9ib3RvQm9sZA._TTW_.woff2 — 11.5 KiB — 0 ms — font-display: swap
cm9ib3Rv._TTW_.woff2 woff2 swap
Size 11 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cm9ib3RvTWVk._TTW_.woff2 woff2 swap
Size 11 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cm9ib3RvQm9sZA._TTW_.woff2 woff2 swap
Size 11 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)
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
Network Waterfall
110 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
78% of JavaScript execution is third-party
First-party Third-party 5031ms · 1674KB · $67/mo
dqpnq362acqdi.cloudfront.net
Other
Costly
Execution 1649ms
Transfer 65 KB
Unused 44%
Monthly Cost $22/mo
Unattributable
Other
Costly
Execution 854ms
Transfer 0 KB
Monthly Cost $11/mo
fb423e1ef94f.6277d64d.us-east-1.token.awswaf.com
Other
Costly
Execution 774ms
Transfer 500 KB
Unused 56%
Monthly Cost $10/mo
dqpnq362acqdi.cloudfront.net
Other
Costly
Execution 741ms
Transfer 724 KB
Unused 56%
Monthly Cost $10/mo
dqpnq362acqdi.cloudfront.net
Other
Costly
Execution 470ms
Transfer 28 KB
Monthly Cost $6/mo
m.media-amazon.com
Other
Costly
Execution 316ms
Transfer 72 KB
Unused 69%
Monthly Cost $4/mo
dqpnq362acqdi.cloudfront.net
Other
Optional
Execution 84ms
Transfer 219 KB
Unused 57%
Monthly Cost $1/mo
dqpnq362acqdi.cloudfront.net
Other
Optional
Execution 72ms
Transfer 41 KB
Unused 55%
Monthly Cost $1/mo
dqpnq362acqdi.cloudfront.net
Other
Optional
Execution 70ms
Transfer 25 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • dqpnq362acqdi.cloudfront.net adds 1649ms and costs ~$22/month
  • Unattributable adds 854ms and costs ~$11/month
  • fb423e1ef94f.6277d64d.us-east-1.token.awswaf.com adds 774ms and costs ~$10/month
  • dqpnq362acqdi.cloudfront.net adds 741ms and costs ~$10/month
  • dqpnq362acqdi.cloudfront.net adds 470ms and costs ~$6/month
  • m.media-amazon.com adds 316ms and costs ~$4/month

78% 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

dqpnq362acqdi.cloudfront.net takes 1649ms 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 854ms 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

fb423e1ef94f.6277d64d.us-east-1.token.awswaf.com takes 774ms 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

56% of fb423e1ef94f.6277d64d.us-east-1.token.awswaf.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

dqpnq362acqdi.cloudfront.net takes 741ms 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

56% of dqpnq362acqdi.cloudfront.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

dqpnq362acqdi.cloudfront.net takes 470ms 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

m.media-amazon.com takes 316ms 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

69% of m.media-amazon.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

57% of dqpnq362acqdi.cloudfront.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

55% of dqpnq362acqdi.cloudfront.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

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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