Performance
· 28 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.
3.44 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
31.43 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
5.00 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.018
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
17.14 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.
42.52 s
Page Load Progression
FPage Weight BudgetAction12.3 MB transferred, 438 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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
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
FJS Execution CostAction25021ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 4772ms | 449ms | 0ms | 1st |
| https://www.jennikayne.com/ | 4004ms | 549ms | 81ms | 1st |
| https://cmp.osano.com/Pv8SZI3P1N/cf39c77d-abff-4a46-ab67-8ee82f580597/osano.js | 3188ms | 2678ms | 57ms | 3rd |
| https://www.jennikayne.com/cdn/shop/t/1513/assets/jk-scripts-global.js?v=130185723439306924151791907871 | 1957ms | 1268ms | 62ms | 1st |
| https://7ce243a1e1a2.cdn4.forter.com/snS/7ce243a1e1a2/script.js | 1901ms | 1751ms | 80ms | 3rd |
| https://acsbapp.com/apps/app/dist/js/app.js | 1002ms | 780ms | 119ms | 3rd |
| (program):2 | 883ms | 307ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/destination?id=G-2MJZJY84L1&cx=c>m=4e6ag1 | 870ms | 752ms | 104ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T2S87DFD | 785ms | 691ms | 68ms | 3rd |
| https://cdn-swell-assets.yotpo.com/app.v1.0.368.js | 764ms | 578ms | 149ms | 3rd |
Showing top 10 of 41 scripts
FJS BundlesAction254 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn-swell-assets.yotpo.com/app.v1.0.368.js | 192 KB | 153 KB (80%) | ✓ | 3rd |
| https://acsbapp.com/apps/app/dist/js/app.js | 241 KB | 121 KB (51%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-944358801 | 164 KB | 116 KB (70%) | ✓ | 3rd |
| https://7ce243a1e1a2.cdn4.forter.com/snS/7ce243a1e1a2/script.js | 226 KB | 95 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=G-2MJZJY84L1&cx=c>m=4e6ag1 | 183 KB | 75 KB (41%) | ✓ | 3rd |
| https://www.jennikayne.com/cdn/shop/t/1513/assets/jk-scripts-global.js?v=130185723439306924151791907871 | 95 KB | 69 KB (73%) | ✓ | 1st |
| https://www.jennikayne.com/cdn/shop/t/1513/assets/jk-scripts-global.js?v=130185723439306924151791907871 | 0 KB | 69 KB (73%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=AW-944358801&cx=c>m=4e6ag1 | 164 KB | 67 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-7151867429037&cx=c>m=4e6ag1 | 149 KB | 67 KB (45%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T2S87DFD | 189 KB | 63 KB (34%) | ✓ | 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
DAsset CompressionAction1 of 6 asset hosts serve text uncompressedFIX
FPage Weight InventoryAction438 resources · 12.3 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 438 resources | 12.3 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization50 images, 0 KB saveableREVIEW
BResource Hints214 hints, 0 missing preconnectsREVIEW
Current Resource Hints
214 resource hints configured
Each preconnect eagerly opens a TCP+TLS connection. On slow networks or low-end devices, too many parallel connections cause head-of-line blocking and starve the connections that matter for LCP. Trim to the 4-6 highest-value origins (the ones serving render-blocking or LCP resources).
Informational: a labeled value pair from the audit.
preconnect already does the DNS lookup; adding dns-prefetch to the same origin is at best a no-op. Sample: https://cdn.shopify.com, https://fonts.googleapis.com, https://fonts.gstatic.com (+5 more). Remove the redundant dns-prefetch entries.
Performance issues directly impact user engagement and conversion rates.
The same href shouldn't appear in multiple hint rels -- one wins, the others are wasted markup and may confuse cache behavior. Sample: https://cdn.searchspring.net (preconnect+dns-prefetch).
Performance issues directly impact user engagement and conversion rates.
CDocument CompressionActionDocument response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
AThird-Party Impact20% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (323 KB)PASS
Web fonts
6
323 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
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)
Fixing the unchecked items could save ~48 KB and ~96 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
ACSS Performance Depth1 CSS depth issue(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall438 requests over 38826msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cmp.osano.com cmp.osano.com | Other | 3188ms | 0 KB | — | €17/mo | Costly |
7ce243a1e1a2.cdn4.forter.com 7ce243a1e1a2.cdn4.forter.com | Other | 1901ms | 226 KB | 42% | €10/mo | Costly |
acsbapp.com acsbapp.com | Other | 1002ms | 241 KB | 51% | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 870ms | 183 KB | 41% | €5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 785ms | 189 KB | 34% | €4/mo | Costly |
cdn-swell-assets.yotpo.com cdn-swell-assets.yotpo.com | Other | 764ms | 192 KB | 80% | €4/mo | Costly |
gkera.jennikayne.com gkera.jennikayne.com | Other | 546ms | 51 KB | 64% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 403ms | 164 KB | 41% | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 303ms | 149 KB | 45% | €2/mo | Costly |
cdn.gladly.com cdn.gladly.com | Other | 246ms | 45 KB | 69% | €1/mo | Costly |
cdn-widgetsrepository.yotpo.com cdn-widgetsrepository.yotpo.com | Other | 218ms | 111 KB | — | €1/mo | Costly |
d-code.liadm.com d-code.liadm.com | Other | 210ms | 53 KB | 38% | €1/mo | Costly |
str.rise-ai.com str.rise-ai.com | Other | 201ms | 31 KB | — | €1/mo | Costly |
d2hrivdxn8ekm8.cloudfront.net d2hrivdxn8ekm8.cloudfront.net | Other | 179ms | 14 KB | — | €1/mo | Optional |
crossborder-integration.global-e.com crossborder-integration.global-e.com | Other | 175ms | 24 KB | — | €1/mo | Optional |
cdn-widgetsrepository.yotpo.com cdn-widgetsrepository.yotpo.com | Other | 159ms | 16 KB | — | €1/mo | Optional |
d1hcrjcdtouu7e.cloudfront.net d1hcrjcdtouu7e.cloudfront.net | Other | 151ms | 45 KB | 65% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 147ms | 164 KB | 70% | €1/mo | Optional |
track.sv.rkdms.com track.sv.rkdms.com | Other | 130ms | 27 KB | — | €1/mo | Optional |
connect.nosto.com connect.nosto.com | Other | 125ms | 0 KB | — | €1/mo | Optional |
cdn-widgetsrepository.yotpo.com cdn-widgetsrepository.yotpo.com | Other | 124ms | 14 KB | — | €1/mo | Optional |
strn.rise-ai.com strn.rise-ai.com | Other | 117ms | 54 KB | 67% | €1/mo | Optional |
cdn.shopify.com cdn.shopify.com | Other | 107ms | 14 KB | — | €1/mo | Optional |
cmp.osano.com cmp.osano.com | Other | 76ms | 29 KB | — | €0/mo | Optional |
gtbpy.jennikayne.com gtbpy.jennikayne.com | Other | 75ms | 4 KB | — | €0/mo | Optional |
cdn-widgetsrepository.yotpo.com cdn-widgetsrepository.yotpo.com | Other | 67ms | 13 KB | — | €0/mo | Optional |
safevisit.online safevisit.online | Other | 64ms | 4 KB | — | €0/mo | Optional |
s.replay.uxtweak.com s.replay.uxtweak.com | Other | 63ms | 10 KB | — | €0/mo | Optional |
cdn.gladly.com cdn.gladly.com | Other | 58ms | 0 KB | — | €0/mo | Optional |
cdn-widgetsrepository.yotpo.com cdn-widgetsrepository.yotpo.com | Other | 55ms | 15 KB | — | €0/mo | Optional |
webservices.global-e.com webservices.global-e.com | Other | 51ms | 1 KB | — | €0/mo | Optional |
These scripts may cost more than they're worth
- cmp.osano.com adds 3188ms and costs ~€17/month
- 7ce243a1e1a2.cdn4.forter.com adds 1901ms and costs ~€10/month
- acsbapp.com adds 1002ms and costs ~€5/month
- Google Tag Manager adds 870ms and costs ~€5/month
- Google Tag Manager adds 785ms and costs ~€4/month
- cdn-swell-assets.yotpo.com adds 764ms and costs ~€4/month
- gkera.jennikayne.com adds 546ms and costs ~€3/month
- Google Tag Manager adds 403ms and costs ~€2/month
- Google Tag Manager adds 303ms and costs ~€2/month
- cdn.gladly.com adds 246ms and costs ~€1/month
- cdn-widgetsrepository.yotpo.com adds 218ms and costs ~€1/month
- d-code.liadm.com adds 210ms and costs ~€1/month
- str.rise-ai.com adds 201ms and costs ~€1/month
50% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
cmp.osano.com takes 3188ms 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
7ce243a1e1a2.cdn4.forter.com takes 1901ms 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
acsbapp.com takes 1002ms 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
51% of acsbapp.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
Google Tag Manager takes 870ms 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
Google Tag Manager takes 785ms 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
cdn-swell-assets.yotpo.com takes 764ms 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
80% of cdn-swell-assets.yotpo.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
gkera.jennikayne.com takes 546ms 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 gkera.jennikayne.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
Google Tag Manager takes 403ms 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
Google Tag Manager takes 303ms 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
cdn.gladly.com takes 246ms 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
69% of cdn.gladly.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
cdn-widgetsrepository.yotpo.com takes 218ms 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
d-code.liadm.com takes 210ms 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
str.rise-ai.com takes 201ms 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
65% of d1hcrjcdtouu7e.cloudfront.net'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
70% of Google Tag Manager'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
67% of strn.rise-ai.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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-20 — 2026-10-17)
LCP (p75)
1621 ms
88% good
INP (p75)
121 ms
89% good
CLS (p75)
0.000
99% good
FCP (p75)
1157 ms
TTFB (p75)
654 ms
Image Optimization116 images, 2282 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
116
Total Size
2282 KB