Performance
· 27 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.
3.18 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
6.63 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
852 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.002
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.93 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.
11.60 s
Page Load Progression
FJS Execution CostAction5981ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://okinawa.dearswedding-resort.jp/ | 2471ms | 28ms | 0ms | 1st |
| https://okinawa.dearswedding-resort.jp/dears_oowehuqfzdxc/cache/data/88b18f8b.js | 1834ms | 367ms | 12ms | 1st |
| Unattributable | 637ms | 79ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-FLKE6SHW6R&cx=c>m=4e65d0 | 274ms | 233ms | 39ms | 3rd |
| https://connect.facebook.net/signals/config/2286298981804104?v=2.9.319&r=stable&domain=okinawa.dearswedding-resort.jp&hme=7441a59ee5070e08bd0157a62d39bd95bf3afdcc83dafbad800e78b5416300a9&ex_m=104%2C207%2C155%2C22%2C72%2C73%2C146%2C68%2C67%2C11%2C164%2C90%2C16%2C138%2C48%2C147%2C77%2C112%2C47%2C127%2C39%2C75%2C78%2C134%2C160%2C166%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C167%2C172%2C221%2C62%2C188%2C189%2C55%2C278%2C30%2C74%2C233%2C232%2C231%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C156%2C76%2C159%2C157%2C158%2C50%2C60%2C123%2C15%2C163%2C45%2C265%2C266%2C264%2C26%2C27%2C28%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C145%2C148%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C150%2C149%2C151%2C142%2C140%2C25%2C35%2C59%2C109%2C162%2C70%2C17%2C153%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C139%2C161%2C34%2C280%2C296%2C214%2C203%2C204%2C202%2C299%2C290%2C52%2C215%2C107%2C131%2C80%2C121%2C54%2C49%2C113%2C120%2C126%2C58%2C64%2C152%2C115%2C37%2C32%2C53%2C56%2C100%2C165%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C168%2C169%2C94%2C95%2C9%2C125%2C102%2C51%2C143%2C87%2C79%2C71%2C117%2C106%2C43%2C144%2C0%2C82%2C137%2C141%2C154%2C38%2C108%2C13%2C170 | 236ms | 206ms | 29ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K97XH7C6 | 234ms | 197ms | 30ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-16637349964&cx=c>m=4e65d0 | 191ms | 160ms | 29ms | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 105ms | 79ms | 24ms | 3rd |
DJS BundlesAction7 scripts, 301 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-FLKE6SHW6R&cx=c>m=4e65d0 | 159 KB | 66 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K97XH7C6 | 152 KB | 66 KB (43%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-16637349964&cx=c>m=4e65d0 | 147 KB | 63 KB (43%) | ✓ | 3rd |
| https://okinawa.dearswedding-resort.jp/dears_oowehuqfzdxc/cache/data/88b18f8b.js | 68 KB | 40 KB (59%) | ✓ | 1st |
| https://connect.facebook.net/signals/config/2286298981804104?v=2.9.319&r=stable&domain=okinawa.dearswedding-resort.jp&hme=7441a59ee5070e08bd0157a62d39bd95bf3afdcc83dafbad800e78b5416300a9&ex_m=104%2C207%2C155%2C22%2C72%2C73%2C146%2C68%2C67%2C11%2C164%2C90%2C16%2C138%2C48%2C147%2C77%2C112%2C47%2C127%2C39%2C75%2C78%2C134%2C160%2C166%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C167%2C172%2C221%2C62%2C188%2C189%2C55%2C278%2C30%2C74%2C233%2C232%2C231%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C156%2C76%2C159%2C157%2C158%2C50%2C60%2C123%2C15%2C163%2C45%2C265%2C266%2C264%2C26%2C27%2C28%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C145%2C148%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C150%2C149%2C151%2C142%2C140%2C25%2C35%2C59%2C109%2C162%2C70%2C17%2C153%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C139%2C161%2C34%2C280%2C296%2C214%2C203%2C204%2C202%2C299%2C290%2C52%2C215%2C107%2C131%2C80%2C121%2C54%2C49%2C113%2C120%2C126%2C58%2C64%2C152%2C115%2C37%2C32%2C53%2C56%2C100%2C165%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C168%2C169%2C94%2C95%2C9%2C125%2C102%2C51%2C143%2C87%2C79%2C71%2C117%2C106%2C43%2C144%2C0%2C82%2C137%2C141%2C154%2C38%2C108%2C13%2C170 | 125 KB | 34 KB (27%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 34 KB (35%) | ✓ | 3rd |
| https://okinawa.dearswedding-resort.jp/dears_oowehuqfzdxc/cache/data/c2a0211c.js | 1 KB | — | ✓ | 1st |
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
DPage Weight InventoryAction81 resources · 1.7 MB · 301 KB savings availableFIX
~301.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 81 resources | 1.7 MiB | ||||||
CPage Weight BudgetAction1.7 MB transferred, 81 requestsREVIEW
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
BThird-Party Impact50% third-party, 0 ms blockingREVIEW
CImage OptimizationAction59 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
Performance issues directly impact user engagement and conversion rates.
Set explicit width and height to prevent CLS.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CMain HTML Cache-ControlActionMain HTML max-age=10800 (~180min) is aggressiveREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
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 Loading3 fonts (180 KB)PASS
Web fonts
3
180 KB total
Render-blocking
0
of 3
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 HintsNo optimization neededPASS
A+Compression AlgorithmMain response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
A+HTTP Cachingmax-age=10800 (3 hours)PASS
private, max-age=10800
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| max-age | 10800 | Cache for 3 hours |
Network Waterfall81 requests over 4303msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 274ms | 159 KB | 41% | ¥379/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 236ms | 125 KB | 27% | ¥326/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 234ms | 152 KB | 43% | ¥323/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 191ms | 147 KB | 43% | ¥263/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 105ms | 97 KB | 35% | ¥144/mo | Costly |
These scripts may cost more than they're worth
- Google Tag Manager adds 274ms and costs ~¥379/month
- Facebook Pixel adds 236ms and costs ~¥326/month
- Google Tag Manager adds 234ms and costs ~¥323/month
- Google Tag Manager adds 191ms and costs ~¥263/month
- Facebook Pixel adds 105ms and costs ~¥144/month
Google Tag Manager takes 274ms 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
Facebook Pixel takes 236ms 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 234ms 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 191ms 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
Facebook Pixel takes 105ms 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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-04-16 — 2026-05-13)
LCP (p75)
1477 ms
93% good
INP (p75)
77 ms
99% good
CLS (p75)
0.000
82% good
FCP (p75)
1443 ms
TTFB (p75)
1061 ms
Image Optimization1 images, 6 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
1
Total Size
6 KB