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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
83
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
40
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.

1.79 s

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

2.31 s

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

572 ms

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

0.002

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

1.79 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.

3.92 s

Page Load Progression

379 ms
758 ms
1.1 s
1.5 s
1.9 s
2.3 s
2.7 s
3.0 s
Checks
17
11 PASS 2 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (509.7 KiB of 509.9 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
JS Execution Cost
Action
1159ms total JS execution
REVIEW
1159ms total JS execution
Warning::
https://www.gamestop.com/cdn-cgi/challenge-platfor...: 965ms CPU time
Info::
Unattributable: 118ms CPU time
Info::
https://www.gamestop.com/collectibles: 76ms CPU time
Warning::
Third-party scripts: 1159ms (100% of total)

Main Thread Breakdown

Script Evaluation 81% Other 12%
ScriptTotalScriptingParse/CompileParty
https://www.gamestop.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f077fcfbaba6f36965ms924ms19ms3rd
Unattributable118ms5ms0ms3rd
https://www.gamestop.com/collectibles76ms10ms2ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
510 KB transferred, 23 requests
PASS
510 KB transferred, 23 requests
Info::
Page weighs 909 KB (510 KB transferred)
Info::
23 HTTP requests
Info::
Estimated 0.10 g CO2 per page load
510 KB / 2.4 MB budget
510 KB transferred
23 requests
0.10 g CO2 per page load
Other 299.6 KiB 59%
HTML 102.2 KiB 20%
JavaScript 89.4 KiB 18%
Images 10.1 KiB 2%
Other 7.0 KiB 1%
Other 1.7 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 10 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
10 scripts, 0 KB unused
PASS
10 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gamestop.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f077fcfbaba6f3672 KB—✓3rd
blob:https://www.gamestop.com/df0a0cde-f4ab-4123-8117-735c2f70494f0 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit17 KB—✓3rd
blob:https://www.gamestop.com/76841271-7d1f-407b-aa59-a463fd75b8fa-0 KB—✓3rd
blob:https://challenges.cloudflare.com/820f6276-b8f2-466b-93a8-1be8a66895b70 KB—✓3rd
blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732-0 KB—✓3rd
blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732-0 KB—✓3rd
blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732-0 KB—✓3rd
blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732-0 KB—✓3rd
blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f5647320 KB—✓3rd
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
Page Weight Inventory
23 resources · 510 KB · 0 KB savings available
PASS
23 resources · 510 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 510 KB
Warning::
21 third-party resources (100% of weight)
Info::
1 resources over 200KB
23 resources · 509.9 KiB · 21 third-party Within 1MB page-weight target
Other 59% · 301.5 KiB
Document 21% · 108.8 KiB
JavaScript 18% · 89.4 KiB
Image 2% · 10.1 KiB
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
23 requests over 2358ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.8 s LCP 2.3 shttps://thinkgeek.com// https://thinkgeek.com/ — 301 — 251 B — 102 ms — h2https://www.gamestop.com/collectibleswww.gamestop.com/collectibles https://www.gamestop.com/collectibles — 307 — 63 B — 203 ms — http/1.1https://thinkgeek.com// https://thinkgeek.com/ — 301 — 0 B — 1 ms — h2https://www.gamestop.com/collectibleswww.gamestop.com/collectibles https://www.gamestop.com/collectibles — 403 — 5.8 KiB — 40 ms — h2https://www.gamestop.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f077fcfbaba6f36www.gamestop.com/cdn-cgi/challenge-... https://www.gamestop.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9f077fcfbaba6f36 — 200 — 72.1 KiB — 60 ms — h2blob:https://www.gamestop.com/df0a0cde-f4ab-4123-8117-735c2f70494fwww.gamestop.com/df0a0cde-f4ab-4123... blob:https://www.gamestop.com/df0a0cde-f4ab-4123-8117-735c2f70494f — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/b/0b8fb825cb67/api.js?onload=cFRiY3&render=explicit — 200 — 17.4 KiB — 92 ms — h3https://www.gamestop.com/favicon.icowww.gamestop.com/favicon.ico https://www.gamestop.com/favicon.ico — 403 — 8.1 KiB — 67 ms — h2https://www.gamestop.com/favicon.icowww.gamestop.com/favicon.ico https://www.gamestop.com/favicon.ico — 403 — 6.7 KiB — 43 ms — h2https://www.gamestop.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2574961096:1776888745:P4hk-3o_RhsRQQX88q8VNO601T4pZszmFrMeGiReD2Q/9f077fcfbaba6f36/ztEObA8zujwKsrPCP2LkLXFfBnkGnWMPUD1IH3wPjdo-1776891010-1.2.1.1-Se5fHcD1mrrAkmnSkfYyXGIyPfpcyLNdj6DaG_cxPGkTYEXjtBmFihhomhdHSGY3www.gamestop.com/cdn-cgi/challenge-... https://www.gamestop.com/cdn-cgi/challenge-platform/h/b/flow/ov1/2574961096:1776888745:P4hk-3o_RhsRQQX88q8VNO601T4pZszmFrMeGiReD2Q/9f077fcfbaba6f36/ztEObA8zujwKsrPCP2LkLXFfBnkGnWMPUD1IH3wPjdo-1776891010-1.2.1.1-Se5fHcD1mrrAkmnSkfYyXGIyPfpcyLNdj6DaG_cxPGkTYEXjtBmFihhomhdHSGY3 — 200 — 13.6 KiB — 64 ms — h2blob:https://www.gamestop.com/76841271-7d1f-407b-aa59-a463fd75b8fawww.gamestop.com/76841271-7d1f-407b... blob:https://www.gamestop.com/76841271-7d1f-407b-aa59-a463fd75b8fa — 200 — -1 B — 25 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/zngr1/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/turnstile/f/ov2/av0/rch/zngr1/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 96.4 KiB — 101 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/cmg/1 — 200 — 208 B — 22 ms — h3blob:https://challenges.cloudflare.com/820f6276-b8f2-466b-93a8-1be8a66895b7challenges.cloudflare.com/820f6276-... blob:https://challenges.cloudflare.com/820f6276-b8f2-466b-93a8-1be8a66895b7 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/132605135:1776888746:UUgqxRDgmAerTIn1KCwsWYrFICNJQNFuswq5ghIZNvY/9f077fd26a6d9e91/PDMnDrNYPEqzVryhGOH7Koaw.AZr.O4WqKxQHx5_nNE-1776891010-1.2.1.1-IfVPEzpXCl9CqoM0neeOQgS0a0ckOB2PCcHgz5TTFr3AensfN3KuomNZPo.vuzMochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/132605135:1776888746:UUgqxRDgmAerTIn1KCwsWYrFICNJQNFuswq5ghIZNvY/9f077fd26a6d9e91/PDMnDrNYPEqzVryhGOH7Koaw.AZr.O4WqKxQHx5_nNE-1776891010-1.2.1.1-IfVPEzpXCl9CqoM0neeOQgS0a0ckOB2PCcHgz5TTFr3AensfN3KuomNZPo.vuzMo — 200 — 286.0 KiB — 189 ms — h3blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732challenges.cloudflare.com/e94de361-... blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732 — 200 — -1 B — 14 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9f077fd26a6d9e91/1776891011255/df536bdfdaa0b80e140e537972935c237d1a51666a988e04fd5686d3bb4cc361/LfJOqlLXYDWl2iVchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/pat/9f077fd26a6d9e91/1776891011255/df536bdfdaa0b80e140e537972935c237d1a51666a988e04fd5686d3bb4cc361/LfJOqlLXYDWl2iV — 401 — 1.7 KiB — 21 ms — h3blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732challenges.cloudflare.com/e94de361-... blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732 — 200 — -1 B — 34 ms — blobblob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732challenges.cloudflare.com/e94de361-... blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732 — 200 — -1 B — 0 ms — blobblob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732challenges.cloudflare.com/e94de361-... blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732 — 200 — -1 B — 19 ms — blobblob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732challenges.cloudflare.com/e94de361-... blob:https://challenges.cloudflare.com/e94de361-7cc4-4e1b-b4bb-d9f16f564732 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9f077fd26a6d9e91/1776891011258/YjF-geQ8BZe_kvHchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/d/9f077fd26a6d9e91/1776891011258/YjF-geQ8BZe_kvH — 200 — 1.9 KiB — 21 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/132605135:1776888746:UUgqxRDgmAerTIn1KCwsWYrFICNJQNFuswq5ghIZNvY/9f077fd26a6d9e91/PDMnDrNYPEqzVryhGOH7Koaw.AZr.O4WqKxQHx5_nNE-1776891010-1.2.1.1-IfVPEzpXCl9CqoM0neeOQgS0a0ckOB2PCcHgz5TTFr3AensfN3KuomNZPo.vuzMochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/b/flow/ov1/132605135:1776888746:UUgqxRDgmAerTIn1KCwsWYrFICNJQNFuswq5ghIZNvY/9f077fd26a6d9e91/PDMnDrNYPEqzVryhGOH7Koaw.AZr.O4WqKxQHx5_nNE-1776891010-1.2.1.1-IfVPEzpXCl9CqoM0neeOQgS0a0ckOB2PCcHgz5TTFr3AensfN3KuomNZPo.vuzMo — -1 — 0 B — 0 ms —
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 1159ms · 78KB · $15/mo
www.gamestop.com
Other
Costly
Execution 965ms
Transfer 72 KB
Monthly Cost $13/mo
Unattributable
Other
Optional
Execution 118ms
Transfer 0 KB
Monthly Cost $2/mo
www.gamestop.com
Other
Optional
Execution 76ms
Transfer 6 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.gamestop.com adds 965ms and costs ~$13/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.gamestop.com takes 965ms 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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