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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
74
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
100
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.

688 ms

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

1.90 s

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

285 ms

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

0.000

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

2.49 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.

4.12 s

Page Load Progression

409 ms
818 ms
1.2 s
1.6 s
2.0 s
2.5 s
2.9 s
3.3 s
Checks
14
5 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
3.5 MB transferred, 262 requests
FIX
3.5 MB transferred, 262 requests
Warning::
Page weighs 11.1 MB (3.5 MB transferred)
Warning::
JavaScript is 2.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.0 MB
Warning::
262 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.72 g CO2 per page load
3.5 MB / 2.4 MB budget
3.5 MB transferred
262 requests
0.72 g CO2 per page load
JavaScript 2.0 MiB 59%
Images 1022.5 KiB 29%
CSS 88.6 KiB 3%
Fonts 87.4 KiB 2%
Other 73.3 KiB 2%
HTML 72.6 KiB 2%
Other 51.4 KiB 1%
Other 50.9 KiB 1%
Other 1.2 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
98% third-party, 0 ms blocking
FIX
98% third-party, 0 ms blocking
Warning::
Third-party code accounts for 98% of page weight (3.4 MiB of 3.5 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
D
JS Execution Cost
Action
3353ms total JS execution
FIX
3353ms total JS execution
Warning::
https://assets.targetimg1.com/ssx/ssx.mod.js?seed=...: 906ms CPU time
Warning::
https://assets.targetimg1.com/webui/top-of-funnel/...: 766ms CPU time
Warning::
https://www.target.com/: 503ms CPU time
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 341ms CPU time
Warning::
Unattributable: 274ms CPU time
Warning::
Third-party scripts: 2850ms (85% of total)

Main Thread Breakdown

Script Evaluation 63% Other 16% Style & Layout 11% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://assets.targetimg1.com/ssx/ssx.mod.js?seed=AIDFTmOdAQAAmO7oOiRcnehXJ13il18RDMT6nZGEofZ0olLprej1iERAo8IY&X-GyJwza5Z--z=q906ms786ms10ms3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/framework-65a34a0ddb0ddadf.js766ms606ms6ms3rd
https://www.target.com/503ms9ms3ms1st
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js341ms278ms16ms3rd
Unattributable274ms17ms2ms3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/pages/_app-ad9d61cea032c42e.js168ms131ms30ms3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/pages/index-5a2f2a2e570120c6.js148ms144ms0ms3rd
https://client.px-cloud.net/PXGWPp4wUS/main.min.js136ms112ms13ms3rd
https://assets.targetimg1.com/webui/scripts/fullstory/fs.20250319-01.js61ms37ms9ms3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/vendor-22b9371b7b1cc3c6.js50ms23ms14ms3rd
F
JS Bundles
Action
118 scripts, 584 KB unused
FIX
118 scripts, 584 KB unused
Warning::
https://assets.targetimg1.com/webui/top-of-funnel/...: 148 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.targetimg1.com/webui/top-of-funnel/...: 91 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 90 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.targetimg1.com/webui/top-of-funnel/...: 78 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.targetimg1.com/webui/scripts/fullst...: 58 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 584 KB
584 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/pages/_app-ad9d61cea032c42e.js340 KB148 KB (44%)✓3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/vendor-22b9371b7b1cc3c6.js165 KB91 KB (55%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js182 KB90 KB (49%)✓3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/slingshot-components-Banner.e3d0d9a65ef4b8db.js110 KB78 KB (71%)✓3rd
https://assets.targetimg1.com/webui/scripts/fullstory/fs.20250319-01.js94 KB58 KB (62%)✓3rd
https://resources.digital-cloud.medallia.com/wdcus/235967/onsite/generic1768825497250.js69 KB39 KB (57%)✓3rd
https://client.px-cloud.net/PXGWPp4wUS/main.min.js93 KB35 KB (38%)✓3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/4117.c9c3b666439d19e3.js43 KB24 KB (57%)✓3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/framework-65a34a0ddb0ddadf.js59 KB21 KB (36%)✓3rd
https://assets.targetimg1.com/webui/top-of-funnel/_next/static/chunks/9959-1024812a931cbee9.js11 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

C
Image Optimization
Action
36 images, 0 KB saveable
REVIEW
36 images, 0 KB saveable
Warning::
https://target.scene7.com/is/image/Target/GUEST_be... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_48... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_c9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_96... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_78... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_f1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_9f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://target.scene7.com/is/image/Target/GUEST_7e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
36 images 1022 KB
0 oversized -0 KB
8 legacy format
9 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

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

Performance issues directly impact user engagement and conversion rates.

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

B
HTTP Caching
private, private, no-cache
REVIEW
private, private, no-cache
Info::
Cache-Control header is set
Got: private, private, no-cache
Info::
ETag present — enables conditional (304) responses
Cache-Control

private, private, no-cache

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
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 (87 KB)
PASS
3 fonts (87 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

87 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 500 ms 1.0 s 1.5 s FCP 688 ms LCP 1.9 shttps://assets.targetimg1.com/ui/fonts/99ecc614-958b-457a-be15-01e00c53057f.woff299ecc614-958b-457a-be15... https://assets.targetimg1.com/ui/fonts/99ecc614-958b-457a-be15-01e00c53057f.woff2 — 29.1 KiB — 0 ms — font-display: swaphttps://assets.targetimg1.com/ui/fonts/3420ab8a-6ccf-4c75-9da7-efe26f1ced8a.woff23420ab8a-6ccf-4c75-9da7... https://assets.targetimg1.com/ui/fonts/3420ab8a-6ccf-4c75-9da7-efe26f1ced8a.woff2 — 29.2 KiB — 0 ms — font-display: swaphttps://assets.targetimg1.com/ui/fonts/99ecc614-958b-457a-be15-01e00c53057f.woff299ecc614-958b-457a-be15... https://assets.targetimg1.com/ui/fonts/99ecc614-958b-457a-be15-01e00c53057f.woff2 — 29.2 KiB — 0 ms — font-display: swap
99ecc614-958b-457a-be15... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
3420ab8a-6ccf-4c75-9da7... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
99ecc614-958b-457a-be15... woff2 swap
Size 29 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
Network Waterfall
262 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
85% of JavaScript execution is third-party
First-party Third-party 2850ms · 1133KB · $16/mo
assets.targetimg1.com
Other
Costly
Execution 906ms
Transfer 196 KB
Monthly Cost $5/mo
assets.targetimg1.com
Other
Costly
Execution 766ms
Transfer 59 KB
Unused 36%
Monthly Cost $4/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 341ms
Transfer 182 KB
Unused 49%
Monthly Cost $2/mo
Unattributable
Other
Costly
Execution 274ms
Transfer 0 KB
Monthly Cost $2/mo
assets.targetimg1.com
Other
Optional
Execution 168ms
Transfer 340 KB
Unused 44%
Monthly Cost $1/mo
assets.targetimg1.com
Other
Optional
Execution 148ms
Transfer 4 KB
Monthly Cost $1/mo
client.px-cloud.net
Other
Optional
Execution 136ms
Transfer 93 KB
Unused 38%
Monthly Cost $1/mo
assets.targetimg1.com
Other
Optional
Execution 61ms
Transfer 94 KB
Unused 62%
Monthly Cost $0/mo
assets.targetimg1.com
Other
Optional
Execution 50ms
Transfer 165 KB
Unused 55%
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • assets.targetimg1.com adds 906ms and costs ~$5/month
  • assets.targetimg1.com adds 766ms and costs ~$4/month
  • securepubads.g.doubleclick.net adds 341ms and costs ~$2/month
  • Unattributable adds 274ms and costs ~$2/month

85% 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

assets.targetimg1.com takes 906ms 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

assets.targetimg1.com takes 766ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

securepubads.g.doubleclick.net takes 341ms 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 274ms 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

62% of assets.targetimg1.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

55% of assets.targetimg1.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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