Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
11.48 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
19.65 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.66 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.
11.74 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.
28.56 s
Page Load Progression
FPage Weight BudgetAction6.1 MB transferred, 141 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
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.
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.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction8535ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://s.pinimg.com/webapp/www/_client-0073557cf82b16aa.mjs | 4875ms | 4325ms | 153ms | 3rd |
| Unattributable | 809ms | 20ms | 0ms | 3rd |
| https://uk.pinterest.com/ | 704ms | 13ms | 8ms | 3rd |
| https://s.pinimg.com/webapp/31320-2f5f600dacb7eabb.mjs | 459ms | 254ms | 4ms | 3rd |
| https://s.pinimg.com/webapp/38595-dd2a1f11d7297c43.mjs | 324ms | 295ms | 28ms | 3rd |
| https://s.pinimg.com/webapp/vendor-react-298c2da23bcc674b.mjs | 237ms | 96ms | 73ms | 3rd |
| https://accounts.google.com/gsi/client?hl=en | 230ms | 146ms | 33ms | 3rd |
| https://s.pinimg.com/webapp/38794-8b06bf08008b5f9e.mjs | 200ms | 146ms | 4ms | 3rd |
| https://connect.facebook.net/en_US/bundle/sdk.js/ | 122ms | 89ms | 31ms | 3rd |
| https://s.pinimg.com/webapp/www/index-3a6953d0851a773e.mjs | 119ms | 4ms | 31ms | 3rd |
Showing top 10 of 16 scripts
FJS BundlesAction70 scripts, 787 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://s.pinimg.com/webapp/www/_client-0073557cf82b16aa.mjs | 272 KB | 163 KB (60%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/gestalt-cfa709e187d7b2b1.mjs | 233 KB | 78 KB (34%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/vendor-react-298c2da23bcc674b.mjs | 138 KB | 68 KB (49%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/74986-5e15008a59b1086e.mjs | 101 KB | 65 KB (64%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/51405-76ae5359063ab8d4.mjs | 63 KB | 54 KB (87%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/bundle/sdk.js/ | 78 KB | 49 KB (64%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/38595-dd2a1f11d7297c43.mjs | 48 KB | 45 KB (93%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/www/index-3a6953d0851a773e.mjs | 72 KB | 43 KB (60%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client?hl=en | 96 KB | 39 KB (68%) | ✓ | 3rd |
| https://s.pinimg.com/webapp/70508-3ecb447b9e808757.mjs | 38 KB | 32 KB (85%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction141 resources · 6.1 MB · 787 KB savings availableFIX
~787.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 141 resources | 6.1 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization42 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (136 KB)PASS
Web fonts
6
136 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints54 hints, 0 missing preconnectsPASS
Current Resource Hints
54 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall141 requests over 2986msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
s.pinimg.com s.pinimg.com | Other | 4875ms | 272 KB | 60% | £51/mo | Costly |
Unattributable Unattributable | Other | 809ms | 0 KB | — | £8/mo | Costly |
uk.pinterest.com uk.pinterest.com | Other | 704ms | 96 KB | — | £7/mo | Costly |
s.pinimg.com s.pinimg.com | Other | 459ms | 11 KB | — | £5/mo | Costly |
s.pinimg.com s.pinimg.com | Other | 324ms | 48 KB | 93% | £3/mo | Costly |
s.pinimg.com s.pinimg.com | Other | 237ms | 138 KB | 49% | £2/mo | Costly |
accounts.google.com accounts.google.com | Other | 230ms | 96 KB | 68% | £2/mo | Costly |
s.pinimg.com s.pinimg.com | Other | 200ms | 8 KB | — | £2/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 122ms | 78 KB | 64% | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 119ms | 72 KB | 60% | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 108ms | 233 KB | 34% | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 89ms | 341 KB | — | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 86ms | 27 KB | — | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 61ms | 101 KB | 64% | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 61ms | 63 KB | 87% | £1/mo | Optional |
s.pinimg.com s.pinimg.com | Other | 50ms | 93 KB | — | £1/mo | Optional |
These scripts may cost more than they're worth
- s.pinimg.com adds 4875ms and costs ~£51/month
- Unattributable adds 809ms and costs ~£8/month
- uk.pinterest.com adds 704ms and costs ~£7/month
- s.pinimg.com adds 459ms and costs ~£5/month
- s.pinimg.com adds 324ms and costs ~£3/month
- s.pinimg.com adds 237ms and costs ~£2/month
- accounts.google.com adds 230ms and costs ~£2/month
- s.pinimg.com adds 200ms and costs ~£2/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 4875ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Unattributable takes 809ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
uk.pinterest.com takes 704ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
s.pinimg.com takes 459ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
s.pinimg.com takes 324ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
93% of s.pinimg.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
s.pinimg.com takes 237ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
accounts.google.com takes 230ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
s.pinimg.com takes 200ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
60% of s.pinimg.com's code is unused. The script may be loading features you don't use.
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.
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.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev