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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
27
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.
92
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.

9.94 s

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

19.01 s

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

2.25 s

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

0.030

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

12.63 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.

27.88 s

Page Load Progression

727 ms
1.5 s
2.2 s
2.9 s
3.6 s
4.4 s
5.1 s
5.8 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
5.9 MB transferred, 139 requests
FIX
5.9 MB transferred, 139 requests
Critical::
Page weighs 12.9 MB (5.9 MB transferred)
Warning::
Images are 3.4 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 3.4 MB
Warning::
JavaScript is 2.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.1 MB
Warning::
139 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.2 g CO2 per page load
5.9 MB / 2.4 MB budget
5.9 MB transferred
139 requests
1.2 g CO2 per page load
Images 3.4 MiB 58%
JavaScript 2.1 MiB 36%
HTML 203.5 KiB 3%
Fonts 136.9 KiB 2%
Other 12.6 KiB 0%
Other 7.1 KiB 0%
Other 4.5 KiB 0%
CSS 2.1 KiB 0%
Other 494 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

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 (5.8 MiB of 5.9 MiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
F
JS Execution Cost
Action
11246ms total JS execution
FIX
11246ms total JS execution
Warning::
https://s.pinimg.com/webapp/www/_client-73b0673355...: 5604ms CPU time
Warning::
Unattributable: 1388ms CPU time
Warning::
https://www.pinterest.com/: 1263ms CPU time
Warning::
https://s.pinimg.com/webapp/18324-f75b500bbaa8e30e...: 782ms CPU time
Warning::
https://s.pinimg.com/webapp/31320-2f5f600dacb7eabb...: 710ms CPU time
Warning::
Third-party scripts: 9983ms (89% of total)

Main Thread Breakdown

Script Evaluation 56% Other 17% Script Parsing & Compilation 14% Style & Layout 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://s.pinimg.com/webapp/www/_client-73b067335506c6f8.mjs5604ms4969ms249ms3rd
Unattributable1388ms24ms0ms3rd
https://www.pinterest.com/1263ms22ms26ms1st
https://s.pinimg.com/webapp/18324-f75b500bbaa8e30e.mjs782ms619ms162ms3rd
https://s.pinimg.com/webapp/31320-2f5f600dacb7eabb.mjs710ms389ms5ms3rd
https://accounts.google.com/gsi/client?hl=en356ms269ms48ms3rd
https://s.pinimg.com/webapp/vendor-react-2ebd5ce9b89d368c.mjs325ms159ms81ms3rd
https://connect.facebook.net/en_US/bundle/sdk.js/185ms135ms44ms3rd
https://s.pinimg.com/webapp/gestalt-247170b7a74e194c.mjs149ms7ms139ms3rd
https://s.pinimg.com/webapp/87108-40948e20f00ac140.mjs130ms88ms21ms3rd

Showing top 10 of 15 scripts

F
JS Bundles
Action
70 scripts, 766 KB unused
FIX
70 scripts, 766 KB unused
Warning::
https://s.pinimg.com/webapp/www/_client-73b0673355...: 158 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.pinimg.com/webapp/gestalt-247170b7a74e19...: 65 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.pinimg.com/webapp/10104-6b462117467ca79e...: 64 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://accounts.google.com/gsi/client?hl=en: 63 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.pinimg.com/webapp/51405-76ae5359063ab8d4...: 54 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 766 KB
766 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.pinimg.com/webapp/www/_client-73b067335506c6f8.mjs265 KB158 KB (60%)✓3rd
https://s.pinimg.com/webapp/gestalt-247170b7a74e194c.mjs137 KB65 KB (48%)✓3rd
https://s.pinimg.com/webapp/10104-6b462117467ca79e.mjs101 KB64 KB (64%)✓3rd
https://accounts.google.com/gsi/client?hl=en93 KB63 KB (68%)✓3rd
https://s.pinimg.com/webapp/51405-76ae5359063ab8d4.mjs63 KB54 KB (87%)✓3rd
https://s.pinimg.com/webapp/vendor-react-2ebd5ce9b89d368c.mjs114 KB51 KB (45%)✓3rd
https://connect.facebook.net/en_US/bundle/sdk.js/78 KB49 KB (64%)✓3rd
https://s.pinimg.com/webapp/92101-925c7db9604b3e02.mjs50 KB46 KB (93%)✓3rd
https://s.pinimg.com/webapp/UnauthHomePage-72552edb70210486.mjs76 KB40 KB (53%)✓3rd
https://s.pinimg.com/webapp/91086-66d2ae18dfc173df.mjs43 KB29 KB (67%)✓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.

B
Image Optimization
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Info::
All images are well-optimized
42 images 3.4 MB
0 oversized -0 KB
42 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
6 fonts (137 KB)
PASS
6 fonts (137 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

137 KB total

Render-blocking

0

of 6

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 9.9 s LCP 19.0 shttps://s.pinimg.com/webapp/Pin-Sans-MacOS-Regular-708c49dd.woff2Pin-Sans-MacOS-Regular-... https://s.pinimg.com/webapp/Pin-Sans-MacOS-Regular-708c49dd.woff2 — 19.8 KiB — 0 ms — font-display: swaphttps://s.pinimg.com/webapp/Pin-Sans-MacOS-Medium-704a4f34.woff2Pin-Sans-MacOS-Medium-7... https://s.pinimg.com/webapp/Pin-Sans-MacOS-Medium-704a4f34.woff2 — 19.8 KiB — 0 ms — font-display: swaphttps://s.pinimg.com/webapp/Pin-Sans-MacOS-Bold-ce475d98.woff2Pin-Sans-MacOS-Bold-ce4... https://s.pinimg.com/webapp/Pin-Sans-MacOS-Bold-ce475d98.woff2 — 19.9 KiB — 0 ms — font-display: swaphttps://s.pinimg.com/webapp/Pin-Sans-MacOS-Heavy-2b6abf8c.woff2Pin-Sans-MacOS-Heavy-2b... https://s.pinimg.com/webapp/Pin-Sans-MacOS-Heavy-2b6abf8c.woff2 — 23.5 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v62/4UaRrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iq2vgCIhM907w.woff24UaRrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v62/4UaRrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iq2vgCIhM907w.woff2 — 53.9 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/googlesans/v62/4UaRrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iq2vgCIhM907w.woff24UaRrENHsxJlGDuGo1OIlJf... https://fonts.gstatic.com/s/googlesans/v62/4UaRrENHsxJlGDuGo1OIlJfC6l_24rlCK1Yo_Iq2vgCIhM907w.woff2 — 0 B — 0 ms — font-display: swap
Pin-Sans-MacOS-Regular-... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Pin-Sans-MacOS-Medium-7... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Pin-Sans-MacOS-Bold-ce4... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Pin-Sans-MacOS-Heavy-2b... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
4UaRrENHsxJlGDuGo1OIlJf... woff2 swap
Size 54 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
4UaRrENHsxJlGDuGo1OIlJf... woff2 swap
Size 0 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
53 hints, 0 missing preconnects
PASS
53 hints, 0 missing preconnects
Info::
Page uses 53 resource hint(s)

Current Resource Hints

preconnect
1
preload
+42
52
dns-prefetch
—
prefetch
—

53 resource hints configured

Network Waterfall
139 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
89% of JavaScript execution is third-party
First-party Third-party 9983ms · 1338KB · $133/mo
s.pinimg.com
Other
Costly
Execution 5604ms
Transfer 265 KB
Unused 60%
Monthly Cost $74/mo
Unattributable
Other
Costly
Execution 1388ms
Transfer 0 KB
Monthly Cost $18/mo
s.pinimg.com
Other
Costly
Execution 782ms
Transfer 341 KB
Monthly Cost $10/mo
s.pinimg.com
Other
Costly
Execution 710ms
Transfer 11 KB
Monthly Cost $9/mo
accounts.google.com
Other
Costly
Execution 356ms
Transfer 93 KB
Unused 68%
Monthly Cost $5/mo
s.pinimg.com
Other
Costly
Execution 325ms
Transfer 114 KB
Unused 45%
Monthly Cost $4/mo
Facebook Pixel
Advertising
Optional
Execution 185ms
Transfer 78 KB
Unused 64%
Monthly Cost $2/mo
s.pinimg.com
Other
Optional
Execution 149ms
Transfer 137 KB
Unused 48%
Monthly Cost $2/mo
s.pinimg.com
Other
Optional
Execution 130ms
Transfer 8 KB
Monthly Cost $2/mo
s.pinimg.com
Other
Optional
Execution 98ms
Transfer 101 KB
Unused 64%
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 70ms
Transfer 25 KB
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 65ms
Transfer 27 KB
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 64ms
Transfer 76 KB
Unused 53%
Monthly Cost $1/mo
s.pinimg.com
Other
Optional
Execution 56ms
Transfer 63 KB
Unused 87%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • s.pinimg.com adds 5604ms and costs ~$74/month
  • Unattributable adds 1388ms and costs ~$18/month
  • s.pinimg.com adds 782ms and costs ~$10/month
  • s.pinimg.com adds 710ms and costs ~$9/month
  • accounts.google.com adds 356ms and costs ~$5/month
  • s.pinimg.com adds 325ms and costs ~$4/month

89% 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

s.pinimg.com takes 5604ms 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

60% of s.pinimg.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

Unattributable takes 1388ms 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

s.pinimg.com takes 782ms 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

s.pinimg.com takes 710ms 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

accounts.google.com takes 356ms 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

68% of accounts.google.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

s.pinimg.com takes 325ms 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

64% of Facebook Pixel'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

64% of s.pinimg.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

53% of s.pinimg.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

87% of s.pinimg.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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