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https://BestBuy.com

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
3
REVIEW
8
PASS
8
INFO
3

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.
85
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

674 ms

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

674 ms

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

243 ms

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

0.008

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

6.91 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.

2.15 s

Page Load Progression

2.6 s
5.2 s
7.7 s
10.3 s
12.9 s
15.5 s
18.1 s
20.6 s
Checks
22
8 PASS 8 REVIEW 3 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 (888.6 KiB of 888.7 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
14 scripts, 316 KB unused
FIX
14 scripts, 316 KB unused
Warning::
https://www.bestbuy.com/~assets/bby/_com/cacheable...: 117 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.bbystatic.com/analytics-dotcom/anal...: 47 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1Ep...: 36 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1Ep...: 36 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1Ep...: 30 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 316 KB
316 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.bestbuy.com/~assets/bby/_com/cacheable-gvp-66138ea0147dd17ecdc9dc0ac1b86344.min.js158 KB117 KB (74%)✓3rd
https://assets.bbystatic.com/analytics-dotcom/analyticsInit-f7791796aa580255fd28610903e3089e.js86 KB47 KB (55%)✓3rd
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB170 KB36 KB (21%)✓3rd
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB169 KB36 KB (21%)✓3rd
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b060654350 KB30 KB (21%)✓3rd
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435147 KB30 KB (21%)✓3rd
https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/initChildPipeline-ffee00971cdf16cacc57f870e14db909.js37 KB20 KB (56%)✓3rd
https://www.bestbuy.com/~assets/bby/_com/legacy-66138ea0147dd17ecdc9dc0ac1b86344.min.js7 KB—✓3rd
blob:https://www.bestbuy.com/87f7071e-b675-4f21-8e90-10c2251f6c300 KB—✓3rd
https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/app.min.js1 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
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
4 images, 0 KB saveable
REVIEW
4 images, 0 KB saveable
Warning::
https://www.bestbuy.com/~assets/bby/_intl/landing_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bestbuy.com/~assets/bby/_intl/landing_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bestbuy.com/~assets/bby/_com/header-fo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.bestbuy.com/~assets/bby/_intl/landing_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
4 images 9 KB
0 oversized -0 KB
4 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

C
JS Execution Cost
Action
1397ms total JS execution
REVIEW
1397ms total JS execution
Warning::
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1Ep...: 611ms CPU time
Warning::
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1Ep...: 468ms CPU time
Info::
Unattributable: 241ms CPU time
Info::
https://assets.bbystatic.com/analytics-dotcom/anal...: 77ms CPU time
Warning::
Third-party scripts: 1156ms (83% of total)

Main Thread Breakdown

Script Evaluation 77% Other 12% Script Parsing & Compilation 6% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435611ms545ms48ms3rd
https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB468ms427ms20ms3rd
Unattributable241ms56ms0ms1st
https://assets.bbystatic.com/analytics-dotcom/analyticsInit-f7791796aa580255fd28610903e3089e.js77ms69ms6ms3rd
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
C
Compression Algorithm
Action
Main response served uncompressed
REVIEW
Main response served uncompressed
Info::
Main HTML response has no Content-Encoding (uncompressed)
The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
B
Page Weight Inventory
72 resources · 889 KB · 316 KB savings available
REVIEW
72 resources · 889 KB · 316 KB savings available
Info::
Within 1MB page-weight target
Got: 889 KB
Info::
~316 KB of savings available
Warning::
71 third-party resources (100% of weight)
72 resources · 888.7 KiB · 71 third-party Within 1MB page-weight target
JavaScript 88% · 784.6 KiB
Font 7% · 64.4 KiB
Other 3% · 22.3 KiB
Image 1% · 9.8 KiB
Document 1% · 5.7 KiB
CSS 0% · 1.9 KiB

~315.9 KiB of savings available

Remove unused JavaScript: 315.9 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
889 KB transferred, 72 requests
PASS
889 KB transferred, 72 requests
Info::
Page weighs 3.0 MB (889 KB transferred)
Warning::
JavaScript is 785 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 785 KB
Info::
72 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
889 KB / 2.4 MB budget
889 KB transferred
72 requests
0.18 g CO2 per page load
JavaScript 784.6 KiB 88%
Fonts 64.4 KiB 7%
Other 13.1 KiB 1%
Other 9.1 KiB 1%
Images 9.0 KiB 1%
HTML 5.7 KiB 1%
CSS 1.9 KiB 0%
Other 897 B 0%
0 2.4 MB 4.9 MB
Under 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

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 (64 KB)
PASS
3 fonts (64 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

64 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 FCP 674 ms LCP 674 mshttps://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/e4ad7a6cc30f9153dc15124aa8ec616c.woff2e4ad7a6cc30f9153dc15124... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/e4ad7a6cc30f9153dc15124aa8ec616c.woff2 — 20.7 KiB — 38 ms — font-display: swaphttps://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/9b64d8057a58697c89b7d537d4f5f809.woff29b64d8057a58697c89b7d53... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/9b64d8057a58697c89b7d537d4f5f809.woff2 — 21.9 KiB — 19 ms — font-display: swaphttps://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/5562484cf98053a028aea627e45d4b7c.woff25562484cf98053a028aea62... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/5562484cf98053a028aea627e45d4b7c.woff2 — 21.8 KiB — 22 ms — font-display: swap
e4ad7a6cc30f9153dc15124... woff2 swap
Size 21 KB
Load time 38 ms
Start 10.6 s
Risk FOUT — text flashes from fallback to web font
9b64d8057a58697c89b7d53... woff2 swap
Size 22 KB
Load time 19 ms
Start 10.6 s
Risk FOUT — text flashes from fallback to web font
5562484cf98053a028aea62... woff2 swap
Size 22 KB
Load time 22 ms
Start 10.6 s
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+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Server Response Intelligence
1 server-response signal(s) detected
PASS
1 server-response signal(s) detected
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
Network Waterfall
72 requests over 28707ms
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 30.0 s FCP 674 ms LCP 674 mshttps://bestbuy.com// https://bestbuy.com/ — 301 — 101 B — 153 ms — h2https://www.bestbuy.com/www.bestbuy.com/ https://www.bestbuy.com/ — 200 — 4.3 KiB — 10.4 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/css/app.csswww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/css/app.css — 200 — 1.9 KiB — 29 ms — h2https://www.bestbuy.com/~assets/bby/_com/header-footer/images/bby_logo-a7e90594729ed2e119331378def6c97e.pngwww.bestbuy.com/~assets/bby/_com/he... https://www.bestbuy.com/~assets/bby/_com/header-footer/images/bby_logo-a7e90594729ed2e119331378def6c97e.png — 200 — 6.7 KiB — 10.0 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/canada.svgwww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/canada.svg — 200 — 1.0 KiB — 8.0 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/usa.svgwww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/usa.svg — 200 — 690 B — 8.1 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/icons/arrow.svgwww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/icons/arrow.svg — 200 — 679 B — 10.1 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/zepto.min.jswww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/zepto.min.js — 200 — 9.7 KiB — 45 ms — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/app.min.jswww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/app.min.js — 200 — 1.0 KiB — 47 ms — h2https://www.bestbuy.com/~assets/bby/_com/cacheable-gvp-66138ea0147dd17ecdc9dc0ac1b86344.min.jswww.bestbuy.com/~assets/bby/_com/ca... https://www.bestbuy.com/~assets/bby/_com/cacheable-gvp-66138ea0147dd17ecdc9dc0ac1b86344.min.js — 200 — 158.3 KiB — 68 ms — h2https://www.bestbuy.com/~assets/bby/_com/legacy-66138ea0147dd17ecdc9dc0ac1b86344.min.jswww.bestbuy.com/~assets/bby/_com/le... https://www.bestbuy.com/~assets/bby/_com/legacy-66138ea0147dd17ecdc9dc0ac1b86344.min.js — 200 — 6.7 KiB — 65 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 200 — 169.5 KiB — 79 ms — h2https://assets.bbystatic.com/analytics-dotcom/analyticsInit-f7791796aa580255fd28610903e3089e.jsassets.bbystatic.com/analytics-dotc... https://assets.bbystatic.com/analytics-dotcom/analyticsInit-f7791796aa580255fd28610903e3089e.js — 200 — 85.9 KiB — 284 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435www.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435 — 200 — 147.0 KiB — 79 ms — h2https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/e4ad7a6cc30f9153dc15124aa8ec616c.woff2www.bestbuy.com/~assets/bby/_com/sc... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/e4ad7a6cc30f9153dc15124aa8ec616c.woff2 — 200 — 20.7 KiB — 38 ms — h2https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/9b64d8057a58697c89b7d537d4f5f809.woff2www.bestbuy.com/~assets/bby/_com/sc... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/9b64d8057a58697c89b7d537d4f5f809.woff2 — 200 — 21.9 KiB — 19 ms — h2https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/5562484cf98053a028aea627e45d4b7c.woff2www.bestbuy.com/~assets/bby/_com/sc... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/5562484cf98053a028aea627e45d4b7c.woff2 — 200 — 21.8 KiB — 22 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 201 — 1.0 KiB — 269 ms — h2https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/sandbox-index-21.42.20.html?parentOrigin=https%3A%2F%2Fwww.bestbuy.com&env=prodwww.bestbuy.com/~assets/bby/_com/an... https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/sandbox-index-21.42.20.html?parentOrigin=https%3A%2F%2Fwww.bestbuy.com&env=prod — 200 — 1.5 KiB — 9.2 s — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 498 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 152 B — 394 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 393 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 511 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 390 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 513 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 485 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 389 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 482 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 491 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 512 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 30.0 s FCP 674 ms LCP 674 mshttps://bestbuy.com// https://bestbuy.com/ — 301 — 101 B — 153 ms — h2https://www.bestbuy.com/www.bestbuy.com/ https://www.bestbuy.com/ — 200 — 4.3 KiB — 10.4 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/css/app.csswww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/css/app.css — 200 — 1.9 KiB — 29 ms — h2https://www.bestbuy.com/~assets/bby/_com/header-footer/images/bby_logo-a7e90594729ed2e119331378def6c97e.pngwww.bestbuy.com/~assets/bby/_com/he... https://www.bestbuy.com/~assets/bby/_com/header-footer/images/bby_logo-a7e90594729ed2e119331378def6c97e.png — 200 — 6.7 KiB — 10.0 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/canada.svgwww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/canada.svg — 200 — 1.0 KiB — 8.0 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/usa.svgwww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/maps/usa.svg — 200 — 690 B — 8.1 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/icons/arrow.svgwww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/images/icons/arrow.svg — 200 — 679 B — 10.1 s — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/zepto.min.jswww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/zepto.min.js — 200 — 9.7 KiB — 45 ms — h2https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/app.min.jswww.bestbuy.com/~assets/bby/_intl/l... https://www.bestbuy.com/~assets/bby/_intl/landing_page/js/app.min.js — 200 — 1.0 KiB — 47 ms — h2https://www.bestbuy.com/~assets/bby/_com/cacheable-gvp-66138ea0147dd17ecdc9dc0ac1b86344.min.jswww.bestbuy.com/~assets/bby/_com/ca... https://www.bestbuy.com/~assets/bby/_com/cacheable-gvp-66138ea0147dd17ecdc9dc0ac1b86344.min.js — 200 — 158.3 KiB — 68 ms — h2https://www.bestbuy.com/~assets/bby/_com/legacy-66138ea0147dd17ecdc9dc0ac1b86344.min.jswww.bestbuy.com/~assets/bby/_com/le... https://www.bestbuy.com/~assets/bby/_com/legacy-66138ea0147dd17ecdc9dc0ac1b86344.min.js — 200 — 6.7 KiB — 65 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 200 — 169.5 KiB — 79 ms — h2https://assets.bbystatic.com/analytics-dotcom/analyticsInit-f7791796aa580255fd28610903e3089e.jsassets.bbystatic.com/analytics-dotc... https://assets.bbystatic.com/analytics-dotcom/analyticsInit-f7791796aa580255fd28610903e3089e.js — 200 — 85.9 KiB — 284 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435www.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435 — 200 — 147.0 KiB — 79 ms — h2https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/e4ad7a6cc30f9153dc15124aa8ec616c.woff2www.bestbuy.com/~assets/bby/_com/sc... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/e4ad7a6cc30f9153dc15124aa8ec616c.woff2 — 200 — 20.7 KiB — 38 ms — h2https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/9b64d8057a58697c89b7d537d4f5f809.woff2www.bestbuy.com/~assets/bby/_com/sc... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/9b64d8057a58697c89b7d537d4f5f809.woff2 — 200 — 21.9 KiB — 19 ms — h2https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/5562484cf98053a028aea627e45d4b7c.woff2www.bestbuy.com/~assets/bby/_com/sc... https://www.bestbuy.com/~assets/bby/_com/sc-pattern-library/dist/5562484cf98053a028aea627e45d4b7c.woff2 — 200 — 21.8 KiB — 22 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 201 — 1.0 KiB — 269 ms — h2https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/sandbox-index-21.42.20.html?parentOrigin=https%3A%2F%2Fwww.bestbuy.com&env=prodwww.bestbuy.com/~assets/bby/_com/an... https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/sandbox-index-21.42.20.html?parentOrigin=https%3A%2F%2Fwww.bestbuy.com&env=prod — 200 — 1.5 KiB — 9.2 s — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 498 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 152 B — 394 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 393 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 511 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 390 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 513 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 485 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 389 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 482 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 491 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 512 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 480 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 491 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 385 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 482 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 487 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 503 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 477 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 495 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 491 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 502 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 485 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 489 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 485 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 478 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 473 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 490 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 495 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 470 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 488 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 490 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 470 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 495 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 482 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 484 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 476 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 476 ms — h2blob:https://www.bestbuy.com/87f7071e-b675-4f21-8e90-10c2251f6c30www.bestbuy.com/87f7071e-b675-4f21-... blob:https://www.bestbuy.com/87f7071e-b675-4f21-8e90-10c2251f6c30 — -1 — 0 B — 0 ms — https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 201 — 1.1 KiB — 357 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 200 — 169.5 KiB — 60 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435www.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO?v=56a603fc-ec25-d5fa-b000-3d8b06065435 — 304 — 241 B — 60 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 201 — 1.1 KiB — 635 ms — h2https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/initChildPipeline-ffee00971cdf16cacc57f870e14db909.jswww.bestbuy.com/~assets/bby/_com/an... https://www.bestbuy.com/~assets/bby/_com/analytics-dotcom/initChildPipeline-ffee00971cdf16cacc57f870e14db909.js — 200 — 36.8 KiB — 26 ms — h2https://www.bestbuy.ca/bbyus-redirect-map/map.jsonwww.bestbuy.ca/bbyus-redirect-map/m... https://www.bestbuy.ca/bbyus-redirect-map/map.json — 200 — 9.1 KiB — 56 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 100 ms — h2https://fel-api.prod.browse.bestbuy.com/exceptionfel-api.prod.browse.bestbuy.com/exc... https://fel-api.prod.browse.bestbuy.com/exception — 200 — 151 B — 102 ms — h2blob:https://www.bestbuy.com/fba6c43d-cddf-476d-a772-b38f4c8aa454www.bestbuy.com/fba6c43d-cddf-476d-... blob:https://www.bestbuy.com/fba6c43d-cddf-476d-a772-b38f4c8aa454 — -1 — 0 B — 0 ms — https://www.bestbuy.com/~assets/bby/_com/header-footer/images/favicon-32.pngwww.bestbuy.com/~assets/bby/_com/he... https://www.bestbuy.com/~assets/bby/_com/header-footer/images/favicon-32.png — 200 — 796 B — 8.1 s — h2blob:https://www.bestbuy.com/b69dd20d-b899-4e50-a128-eb650b0ea825www.bestbuy.com/b69dd20d-b899-4e50-... blob:https://www.bestbuy.com/b69dd20d-b899-4e50-a128-eb650b0ea825 — -1 — 0 B — 0 ms — blob:https://www.bestbuy.com/711378aa-fd95-440d-bf41-072d87c54721www.bestbuy.com/711378aa-fd95-440d-... blob:https://www.bestbuy.com/711378aa-fd95-440d-bf41-072d87c54721 — -1 — 0 B — 0 ms — https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEBwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/QY1EprV3Ofkuz8/RUpYAQ/S1cpX/iw0HCEB — 201 — 1.1 KiB — 358 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVOwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO — 200 — 1.5 KiB — 87 ms — h2https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVOwww.bestbuy.com/-cJDnfjvk/Et/H6CugM... https://www.bestbuy.com/-cJDnfjvk/Et/H6CugMg/Lm1EprV3/Uj5gAQ/elVGU/GoCRXVO — 200 — 1.5 KiB — 260 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
83% of JavaScript execution is third-party
First-party Third-party 1156ms · 87KB · $15/mo
www.bestbuy.com
Other
Costly
Execution 611ms
Transfer 0 KB
Unused 21%
Monthly Cost $8/mo
www.bestbuy.com
Other
Costly
Execution 468ms
Transfer 1 KB
Unused 21%
Monthly Cost $6/mo
assets.bbystatic.com
Other
Optional
Execution 77ms
Transfer 86 KB
Unused 55%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.bestbuy.com adds 611ms and costs ~$8/month
  • www.bestbuy.com adds 468ms and costs ~$6/month

83% 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.bestbuy.com takes 611ms 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.bestbuy.com takes 468ms 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

55% of assets.bbystatic.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

Image Optimization
12 images, 23 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

12

Total Size

23 KB

3 missing alt text 12 missing dimensions 9 missing lazy loading
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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