Performance
· 23 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.
2.16 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.10 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
22 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.
2.93 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.
4.14 s
Page Load Progression
FPage Weight BudgetAction3.6 MB transferred, 105 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
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=4e65d0h1 | 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=4e65d0h1 | 147 KB | 62 KB (42%) | ✓ | 3rd |
| https://okinawa.dearswedding-resort.jp/dears_oowehuqfzdxc/cache/data/88b18f8b.js | 68 KB | 40 KB (59%) | ✓ | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 97 KB | 34 KB (35%) | ✓ | 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 | 125 KB | 34 KB (27%) | ✓ | 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
CImage OptimizationAction83 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.
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
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
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
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
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
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
CJS Execution CostAction1423ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://okinawa.dearswedding-resort.jp/ | 620ms | 6ms | 0ms | 1st |
| https://okinawa.dearswedding-resort.jp/dears_oowehuqfzdxc/cache/data/88b18f8b.js | 415ms | 96ms | 3ms | 1st |
| Unattributable | 187ms | 7ms | 0ms | 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 | 75ms | 64ms | 7ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-K97XH7C6 | 65ms | 55ms | 7ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-FLKE6SHW6R&cx=c>m=4e65d0h1 | 61ms | 51ms | 10ms | 3rd |
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
CPage Weight InventoryAction105 resources · 3.6 MB · 301 KB savings availableREVIEW
~301.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 105 resources | 3.6 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact24% third-party, 0 ms blockingPASS
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+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 Waterfall105 requests over 3776msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Facebook Pixel connect.facebook.net | Advertising | 75ms | 125 KB | 27% | ¥104/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 65ms | 152 KB | 43% | ¥90/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 61ms | 159 KB | 41% | ¥84/mo | Costly |
These scripts may cost more than they're worth
- Facebook Pixel adds 75ms and costs ~¥104/month
- Google Tag Manager adds 65ms and costs ~¥90/month
- Google Tag Manager adds 61ms and costs ~¥84/month
Facebook Pixel takes 75ms 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 65ms 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 61ms 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