https://huangguoac.com
Performance
· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
90
GRADE
A
FIX
3
REVIEW
4
PASS
12
INFO
5
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
94
83
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
641 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.60 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
7 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.
787 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.61 s
Page Load Progression
375 ms
750 ms 1.1 s 1.5 s 1.9 s 2.2 s 2.6 s 3.0 sChecks
2412 PASS 4 REVIEW 3 FIX
DPage Weight BudgetAction2.5 MB transferred, 93 requestsFIX
Page Weight Budget
Action2.5 MB transferred, 93 requests
2.5 MB transferred, 93 requests
Warning::
Page weighs 4.2 MB (2.5 MB transferred)
Info::
93 HTTP requests
Info::
Estimated 0.53 g CO2 per page load
2.5 MB transferred
93 requests
0.53 g CO2 per page load
Other 1.6 MiB 61%
Images 444.5 KiB 17%
JavaScript 395.2 KiB 15%
Other 98.6 KiB 4%
HTML 39.3 KiB 2%
CSS 36.9 KiB 1%
Other 308 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget
DThird-Party ImpactAction68% third-party, 0 ms blockingFIX
Third-Party Impact
Action68% third-party, 0 ms blocking
68% third-party, 0 ms blocking
Warning::
Third-party code accounts for 68% of page weight (1.7 MiB of 2.5 MiB)
Info::
Third-party blocking time is low (0 ms)
32%
68%
First-party Third-party
DPage Weight InventoryAction93 resources · 2.5 MB · 101 KB savings availableFIX
Page Weight Inventory
Action93 resources · 2.5 MB · 101 KB savings available
93 resources · 2.5 MB · 101 KB savings available
Warning::
Page weight 2.5 MB exceeds 1 MB target by 1.5 MB
Got: 2.5 MB Expected: ≤ 1 MB
Info::
~101 KB of savings available
Warning::
53 third-party resources (68% of weight)
Info::
3 resources over 200KB
93 resources · 2.5 MiB · 53 third-party 1.5 MiB over 1MB target
Other 61% · 1.6 MiB
Image 21% · 543.1 KiB
JavaScript 15% · 395.2 KiB
Document 2% · 39.3 KiB
CSS 1% · 36.9 KiB
~100.9 KiB of savings available
Remove unused JavaScript: 100.9 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 93 resources | 2.5 MiB | ||||||
BImage Optimization29 images, 0 KB saveableREVIEW
Image Optimization
29 images, 0 KB saveable
29 images, 0 KB saveable
Info::
All images are well-optimized
29 images 445 KB
0 oversized -0 KB
19 legacy format
0 missing dimensions CLS risk
BJS Execution Cost997ms total JS executionREVIEW
JS Execution Cost
997ms total JS execution
997ms total JS execution
Warning::
https://huangguoac.com/: 559ms CPU time
Warning::
Unattributable: 264ms CPU time
Info::
https://huangguoac.com/static/web/js/hg-nav-more.j...: 98ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-69BT...: 77ms CPU time
Info::
Third-party scripts: 77ms (8% of total)
Main Thread Breakdown
Other 42% Script Evaluation 24% Style & Layout 20% Rendering 9%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://huangguoac.com/ | 559ms | 19ms | 3ms | 1st |
| Unattributable | 264ms | 8ms | 0ms | 1st |
| https://huangguoac.com/static/web/js/hg-nav-more.js?v=20261023005-fit | 98ms | 89ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-69BTLSM9F0 | 77ms | 64ms | 12ms | 3rd |
BJS Bundles17 scripts, 101 KB unusedREVIEW
JS Bundles
17 scripts, 101 KB unused
17 scripts, 101 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-69BT...: 73 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://huangguoac.com/static/web/js/lib/ssp-core-...: 28 KB unused (59%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 101 KB
101 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-69BTLSM9F0 | 177 KB | 73 KB (41%) | ✓ | 3rd |
| https://huangguoac.com/static/web/js/lib/ssp-core-v0.0.4-20260827.js | 47 KB | 28 KB (59%) | ✓ | 1st |
| https://huangguoac.com/static/web/js/ssp-cache-scope.js?v=20261023005 | 2 KB | — | ✓ | 1st |
| https://huangguoac.com/static/web/js/hg-nav-more.js?v=20261023005-fit | 3 KB | — | ✓ | 1st |
| https://analytics.ahrefs.com/analytics.js | 3 KB | — | ✓ | 3rd |
| https://huangguoac.com/static/web/js/main.js?v=20261023005 | 1 KB | — | ✓ | 1st |
| https://huangguoac.com/static/web/js/tracking.js?v=20261023005 | 7 KB | — | ✗ | 1st |
| https://huangguoac.com/static/web/js/ssp-mount.js?v=20261023005 | 43 KB | — | ✗ | 1st |
| https://huangguoac.com/static/web/js/lib/require.js?v=20261023005 | 7 KB | — | ✓ | 1st |
| https://huangguoac.com/static/web/js/lib/web-sdk-v1.1.8.js | 33 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
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
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.
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 LoadingNo web fonts (system fonts)PASS
Font Loading
No web fonts (system fonts)
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
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+Main HTML Cache-ControlMain HTML max-age=60 (≤ 5min) is appropriatePASS
Main HTML Cache-Control
Main HTML max-age=60 (≤ 5min) is appropriate
Main HTML max-age=60 (≤ 5min) is appropriate
Info::
Main HTML max-age=60 (≤ 5min) is appropriate
Got: public, max-age=60, s-maxage=120, stale-while-revalidate=60
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: User-Agent
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::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
A+HTTP Cachingmax-age=60 (1 minute)PASS
HTTP Caching
max-age=60 (1 minute)
max-age=60 (1 minute)
Info::
Cache-Control header is set
Got: public, max-age=60, s-maxage=120, stale-while-revalidate=60
Info::
Effective TTL: 1 minute (max-age=60)
Info::
CDN TTL: 2 minutes (s-maxage=120)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
public, max-age=60, s-maxage=120, stale-while-revalidate=60
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 60 | Cache for 1 minute |
| s-maxage | 120 | CDN caches for 2 minutes |
| stale-while-revalidate | 60 | Serve stale for 1 minute while fetching fresh |
Effective TTL: 60 seconds
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall93 requests over 40953msINFO
Network Waterfall
93 requests over 40953ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
8% of JavaScript execution is third-party
First-party Third-party 77ms · 177KB · ¥4/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 77ms | 177 KB | 41% | ¥4/mo | Optional |
Google Tag Manager
Tag Manager
Execution 77ms
Transfer 177 KB
Unused 41%
Monthly Cost ¥4/mo
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-23 — 2026-10-20)
LCP (p75)
1176 ms
91% good
INP (p75)
102 ms
95% good
CLS (p75)
0.000
96% good
FCP (p75)
1025 ms
TTFB (p75)
784 ms
This origin passes Core Web Vitals assessment
Image Optimization91 images, 4798 KB total, 126 KB wastedINFO
Image Optimization
91 images, 4798 KB total, 126 KB wasted
Image Optimization Audit
Total Images
91
Total Size
4798 KB
Oversized
2
Wasted
126 KB
28 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.