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https://huangguoju.com

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
1
REVIEW
2
PASS
20
INFO
4

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
95
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.76 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

2.71 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.

0.000

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.86 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.

2.71 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 s
Checks
27
20 PASS 2 REVIEW 1 FIX
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-store

DirectiveValueMeaning
no-store—Never cache this response
B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Info::
All images are well-optimized
8 images 167 KB
0 oversized -0 KB
6 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
745ms total JS execution
REVIEW
745ms total JS execution
Warning::
https://huangguoju.com/: 450ms CPU time
Info::
Unattributable: 238ms CPU time
Info::
https://huangguoju.com/site.js?v=2026092402: 58ms CPU time

Main Thread Breakdown

Style & Layout 48% Other 33% Script Evaluation 12% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://huangguoju.com/450ms5ms1ms1st
Unattributable238ms8ms0ms1st
https://huangguoju.com/site.js?v=202609240258ms35ms2ms1st
A+
Page Weight Budget
207 KB transferred, 16 requests
PASS
207 KB transferred, 16 requests
Info::
Page weighs 298 KB (207 KB transferred)
Info::
16 HTTP requests
Info::
Estimated 0.04 g CO2 per page load
207 KB / 2.4 MB budget
207 KB transferred
16 requests
0.04 g CO2 per page load
Images 166.7 KiB 81%
JavaScript 15.0 KiB 7%
HTML 8.6 KiB 4%
CSS 8.5 KiB 4%
Other 7.7 KiB 4%
Other 453 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
5% third-party, 0 ms blocking
PASS
5% third-party, 0 ms blocking
Info::
Third-party code accounts for 5% of page weight (10.2 KiB of 206.9 KiB)
Info::
Third-party blocking time is low (0 ms)
95%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
3 scripts, 0 KB unused
PASS
3 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://huangguoju.com/site.js?v=20260924023 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d8730179208881409210 KB—✓3rd
https://huangguoju.com/brand-download.js?v=20260924022 KB—✓1st
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
2
dns-prefetch
—
prefetch
—

2 resource hints configured

A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
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 Compression
Document response uses brotli
PASS
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 Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
PASS
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store
A+
Server-Timing Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
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::
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+
Page Weight Inventory
16 resources · 207 KB · 0 KB savings available
PASS
16 resources · 207 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 207 KB
Info::
1 third-party resources (5% of weight)
16 resources · 206.9 KiB · 1 third-party Within 1MB page-weight target
Image 84% · 174.4 KiB
JavaScript 7% · 15.0 KiB
Document 4% · 8.6 KiB
CSS 4% · 8.5 KiB
Other 0% · 453 B
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Asset Compression
No text asset hosts to measure
INFO
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 Waterfall
16 requests over 1072ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.8 s LCP 2.7 shttps://huangguoju.com// https://huangguoju.com/ — 200 — 8.6 KiB — 346 ms — h3https://huangguoju.com/assets/hero/mobile/slide-1.webp?v=2026092402/assets/hero/mobile/slide-1.webp?v=... https://huangguoju.com/assets/hero/mobile/slide-1.webp?v=2026092402 — 200 — 63.8 KiB — 49 ms — h3https://huangguoju.com/site.css?v=2026092402/site.css?v=2026092402 https://huangguoju.com/site.css?v=2026092402 — 200 — 7.2 KiB — 44 ms — h3https://huangguoju.com/brand-config.css?v=2026090802/brand-config.css?v=2026090802 https://huangguoju.com/brand-config.css?v=2026090802 — 200 — 1.4 KiB — 40 ms — h3https://huangguoju.com/assets/logo.webp?v=2026092402/assets/logo.webp?v=2026092402 https://huangguoju.com/assets/logo.webp?v=2026092402 — 200 — 92.9 KiB — 55 ms — h3https://huangguoju.com/site.js?v=2026092402/site.js?v=2026092402 https://huangguoju.com/site.js?v=2026092402 — 200 — 2.8 KiB — 642 ms — h3https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/vce701823e78c4301a35b7e07294d87301792088814092 — 200 — 10.2 KiB — 93 ms — h2https://huangguoju.com/assets/icons/download.svg?v=20260908/assets/icons/download.svg?v=202609... https://huangguoju.com/assets/icons/download.svg?v=20260908 — 200 — 1.0 KiB — 60 ms — h3https://huangguoju.com/assets/icons/highlight-play.svg?v=20260908/assets/icons/highlight-play.svg?v=... https://huangguoju.com/assets/icons/highlight-play.svg?v=20260908 — 200 — 4.0 KiB — 60 ms — h3https://huangguoju.com/assets/icons/highlight-sparkle.svg?v=20260908/assets/icons/highlight-sparkle.svg... https://huangguoju.com/assets/icons/highlight-sparkle.svg?v=20260908 — 200 — 1.9 KiB — 58 ms — h3https://huangguoju.com/assets/icons/highlight-target.svg?v=20260908/assets/icons/highlight-target.svg?... https://huangguoju.com/assets/icons/highlight-target.svg?v=20260908 — 200 — 1.5 KiB — 58 ms — h3https://huangguoju.com/brand-download.js?v=2026092402/brand-download.js?v=2026092402 https://huangguoju.com/brand-download.js?v=2026092402 — 200 — 2.0 KiB — 651 ms — h3https://huangguoju.com/assets/lines/highlights-mobile.svg?v=2026090801/assets/lines/highlights-mobile.svg... https://huangguoju.com/assets/lines/highlights-mobile.svg?v=2026090801 — 200 — 837 B — 14 ms — h3https://huangguoju.com/assets/lines/experience-mobile.svg?v=2026090801/assets/lines/experience-mobile.svg... https://huangguoju.com/assets/lines/experience-mobile.svg?v=2026090801 — 200 — 838 B — 17 ms — h3https://huangguoju.com/cdn-cgi/rum?/cdn-cgi/rum? https://huangguoju.com/cdn-cgi/rum? — 204 — 453 B — 9 ms — h3https://huangguoju.com/assets/favicon.ico?v=20260913/assets/favicon.ico?v=20260913 https://huangguoju.com/assets/favicon.ico?v=20260913 — 200 — 7.7 KiB — 31 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-09-23 — 2026-10-20)

LCP (p75)

1412 ms

90% good

INP (p75)

49 ms

98% good

CLS (p75)

0.000

99% good

FCP (p75)

1341 ms

TTFB (p75)

811 ms

This origin passes Core Web Vitals assessment
Image Optimization
39 images, 175 KB total, 90 KB wasted
INFO

Image Optimization Audit

Total Images

39

Total Size

175 KB

Oversized

1

Wasted

90 KB

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.

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