https://blockzenx.com/#/
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
84
GRADE
B
FIX
2
REVIEW
9
PASS
8
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
86
58
92
82
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
831 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.84 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
17 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.29 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.
1.84 s
Page Load Progression
539 ms 1.1 s 1.6 s 2.2 s
2.7 s
3.2 s 3.8 s
4.3 sChecks
218 PASS 9 REVIEW 2 FIX
FPage Weight BudgetAction2.7 MB transferred, 108 requestsFIX
Page Weight Budget
Action2.7 MB transferred, 108 requests
2.7 MB transferred, 108 requests
Warning::
Page weighs 4.9 MB (2.7 MB transferred)
Info::
Fonts are 1.8 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.8 MB
Warning::
JavaScript is 625 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 625 KB
Warning::
108 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.57 g CO2 per page load
2.7 MB transferred
108 requests
0.57 g CO2 per page load
Fonts 1.8 MiB 66%
JavaScript 625.2 KiB 23%
Images 213.9 KiB 8%
CSS 91.2 KiB 3%
Other 8.4 KiB 0%
Other 5.9 KiB 0%
HTML 795 B 0%
Other 611 B 0%
0 2.4 MB 4.9 MB
Over budget
Subset fonts to include only used characters, or switch to system font stacks.
Why this matters
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
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.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DHTTP CachingActionNo cache headersFIX
HTTP Caching
ActionNo cache headers
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization27 images, 0 KB saveableREVIEW
Image Optimization
27 images, 0 KB saveable
27 images, 0 KB saveable
Info::
All images are well-optimized
27 images 191 KB
0 oversized -0 KB
19 legacy format
0 missing dimensions CLS risk
BJS Execution Cost606ms total JS executionREVIEW
JS Execution Cost
606ms total JS execution
606ms total JS execution
Warning::
https://blockzenx.com/assets/index-CvM7Jt0w.js: 348ms CPU time
Info::
Unattributable: 165ms CPU time
Info::
https://blockzenx.com/: 93ms CPU time
Main Thread Breakdown
Script Evaluation 41% Other 38% Style & Layout 17%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://blockzenx.com/assets/index-CvM7Jt0w.js | 348ms | 254ms | 1ms | 1st |
| Unattributable | 165ms | 3ms | 0ms | 1st |
| https://blockzenx.com/ | 93ms | 2ms | 1ms | 1st |
BJS Bundles34 scripts, 76 KB unusedREVIEW
JS Bundles
34 scripts, 76 KB unused
34 scripts, 76 KB unused
Warning::
https://blockzenx.com/assets/index-CvM7Jt0w.js: 76 KB unused (15%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 76 KB
76 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://blockzenx.com/assets/index-CvM7Jt0w.js | 557 KB | 76 KB (15%) | ✓ | 1st |
| https://blockzenx.com/assets/fui-tabs.Cu2tOMPw.js | 2 KB | — | ✓ | 1st |
| https://blockzenx.com/assets/uni-popup.CIolS0nO.js | 4 KB | — | ✓ | 1st |
| https://blockzenx.com/static/h5-gate-theme.js?v=2026072416 | 2 KB | — | ✓ | 1st |
| https://blockzenx.com/static/h5-gold-patch.js?v=2026072416 | 2 KB | — | ✓ | 1st |
| https://blockzenx.com/static/h5-wallet-gold-patch.js?v=2026072416 | 3 KB | — | ✓ | 1st |
| https://blockzenx.com/static/h5-exchange-gold-patch.js?v=2026072416 | 3 KB | — | ✓ | 1st |
| https://blockzenx.com/static/h5-polish-patch.js?v=2026072416 | 2 KB | — | ✓ | 1st |
| https://blockzenx.com/static/h5-contract-gold-patch.js?v=2026072416 | 2 KB | — | ✓ | 1st |
| https://blockzenx.com/assets/pages-newindex-newindex.2_XIzYKd.js | 12 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
HTTP/3 (QUIC)
HTTP/3 not advertised
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
Main HTML Cache-Control
No Cache-Control header on main HTML response
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
CPage Weight InventoryAction108 resources · 2.7 MB · 76 KB savings availableREVIEW
Page Weight Inventory
Action108 resources · 2.7 MB · 76 KB savings available
108 resources · 2.7 MB · 76 KB savings available
Warning::
Page weight 2.7 MB exceeds 1 MB target by 1.7 MB
Got: 2.7 MB Expected: ≤ 1 MB
Info::
~76 KB of savings available
Info::
7 third-party resources (0% of weight)
Info::
3 resources over 200KB
108 resources · 2.7 MiB · 7 third-party 1.7 MiB over 1MB target
Font 66% · 1.8 MiB
JavaScript 23% · 625.2 KiB
Image 8% · 213.9 KiB
CSS 3% · 91.2 KiB
Other 1% · 14.3 KiB
Document 0% · 1.4 KiB
~75.5 KiB of savings available
Remove unused JavaScript: 75.5 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 108 resources | 2.7 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
ActionWhether the site is served from green-energy infrastructure
Green Hosting
No green hosting detected
A+Third-Party ImpactNo third-party resourcesPASS
Third-Party Impact
No third-party resources
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Font Loading6 fonts (1824 KB)PASS
Font Loading
6 fonts (1824 KB)
6 fonts (1824 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
1824 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
Inter-Regular.woff2 unknown swap
Size 0 KB
Load time 200 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
Inter-Medium.woff2 unknown swap
Size 0 KB
Load time 230 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
HarmonyOS_Sans_Regular-... ttf swap
Size 144 KB
Load time 206 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
HarmonyOS_Sans_SC_Mediu... ttf swap
Size 824 KB
Load time 394 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fui-icon-D7orQT4U.ttf ttf swap
Size 39 KB
Load time 395 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
HarmonyOS_Sans_SC_Bold-... ttf swap
Size 817 KB
Load time 219 ms
Start 2.8 s
Risk FOUT — text flashes from fallback to web font
- Convert to woff2 for ~30% smaller file size
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~1439 KB and ~2878 ms
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
Network Waterfall108 requests over 3277msINFO
Network Waterfall
108 requests over 3277ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization8 images, 123 KB total, 0 KB wastedINFO
Image Optimization
8 images, 123 KB total, 0 KB wasted
Image Optimization Audit
Total Images
8
Total Size
123 KB
8 missing alt text 8 missing dimensions 5 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.