Performance
· 24 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.
2.52 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.96 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
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.
3.71 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.
3.96 s
Page Load Progression
FPage Weight BudgetAction8.3 MB transferred, 161 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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
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 Execution CostAction2438ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://ezcloud.vn/ | 1344ms | 17ms | 3ms | 1st |
| https://ezcloud.vn/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 415ms | 257ms | 2ms | 1st |
| Unattributable | 318ms | 13ms | 0ms | 1st |
| https://www.gstatic.com/recaptcha/releases/bSuJ2xBC8cFy7pM4Z3Hu9boH/recaptcha__en.js | 208ms | 179ms | 16ms | 3rd |
| https://message-customer.ezone.travel/chatbox-customer.js | 82ms | 68ms | 1ms | 3rd |
| https://ezcloud.vn/wp-content/plugins/elementor/assets/lib/swiper/swiper.min.js?ver=5.3.6 | 71ms | 38ms | 4ms | 1st |
FJS BundlesAction44 scripts, 840 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.gstatic.com/recaptcha/releases/bSuJ2xBC8cFy7pM4Z3Hu9boH/recaptcha__en.js | 0 KB | 178 KB (51%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/bSuJ2xBC8cFy7pM4Z3Hu9boH/recaptcha__en.js | 0 KB | 178 KB (51%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/bSuJ2xBC8cFy7pM4Z3Hu9boH/recaptcha__en.js | 348 KB | 178 KB (51%) | ✓ | 3rd |
| https://www.gstatic.com/recaptcha/releases/bSuJ2xBC8cFy7pM4Z3Hu9boH/recaptcha__en.js | 349 KB | 178 KB (51%) | ✓ | 3rd |
| https://message-customer.ezone.travel/chatbox-customer.js | 432 KB | 92 KB (22%) | ✓ | 3rd |
| https://ezcloud.vn/wp-content/plugins/elementor-pro/assets/js/preloaded-elements-handlers.min.js?ver=3.20.1 | 49 KB | 37 KB (76%) | ✓ | 1st |
| https://ezcloud.vn/wp-content/plugins/elementor/assets/js/frontend-modules.min.js?ver=3.25.4 | 15 KB | — | ✓ | 1st |
| https://ezcloud.vn/wp-includes/js/dist/vendor/wp-polyfill.min.js?ver=3.15.0 | 13 KB | — | ✓ | 1st |
| https://ezcloud.vn/wp-content/plugins/table-of-contents-plus/assets/front.min.js?ver=202609.1 | 3 KB | — | ✓ | 1st |
| https://ezcloud.vn/wp-content/themes/ezcloud-2023/assets/js/bootstrap.min.js | 15 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 InventoryAction161 resources · 8.3 MB · 840 KB savings availableFIX
~840.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 161 resources | 8.3 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store, no-cache, must-revalidate, max-age=0
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| no-cache | — | Cache but always revalidate first |
| must-revalidate | — | Must recheck with server after expiry |
| max-age | 0 | Cache for 0 seconds |
CImage OptimizationAction56 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
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Third-Party Impact17% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading12 fonts (698 KB)PASS
Web fonts
12
698 KB total
Render-blocking
0
of 12
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~9 KB and ~18 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall161 requests over 8080msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.gstatic.com www.gstatic.com | Other | 208ms | 0 KB | 51% | ₫54450/mo | Costly |
message-customer.ezone.travel message-customer.ezone.travel | Other | 82ms | 432 KB | 22% | ₫21404/mo | Costly |
These scripts may cost more than they're worth
- www.gstatic.com adds 208ms and costs ~₫54450/month
- message-customer.ezone.travel adds 82ms and costs ~₫21404/month
www.gstatic.com takes 208ms 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 www.gstatic.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
message-customer.ezone.travel takes 82ms 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 (2026-10-07 — 2026-11-03)
LCP (p75)
1879 ms
86% good
INP (p75)
264 ms
67% good
CLS (p75)
0.020
86% good
FCP (p75)
1891 ms
TTFB (p75)
523 ms
Image Optimization183 images, 4567 KB total, 2441 KB wastedINFO
Image Optimization Audit
Total Images
183
Total Size
4567 KB
Oversized
14
Wasted
2441 KB