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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
68
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
72
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
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.

2.48 s

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

3.13 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.

2.55 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.

3.13 s

Page Load Progression

410 ms
820 ms
1.2 s
1.6 s
2.0 s
2.5 s
2.9 s
3.3 s
Checks
15
8 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (618.6 KiB of 618.7 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
47 images, 0 KB saveable
REVIEW
47 images, 0 KB saveable
Warning::
https://www.cnblogs.com/images/aggsite/digged.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/logo.svg?v=2SMrXdIv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://img2024.cnblogs.com/blog/35695/202604/3569... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/picked.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/subscriptio... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/following.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/history.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/pulldown-li... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/candidate.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/commented.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/category.sv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.cnblogs.com/images/aggsite/dark.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
47 images 350 KB
0 oversized -0 KB
43 legacy format
12 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

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.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Bundles
7 scripts, 63 KB unused
REVIEW
7 scripts, 63 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-M95P...: 63 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 63 KB
63 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-M95P3TTWJZ157 KB63 KB (40%)✓3rd
https://assets.cnblogs.com/scripts/jquery-3.3.1.min.js30 KB—✓3rd
https://cdn-www.cnblogs.com/js/aggsite-new.min.js?v=IgggDUGX9TUGTatF8b3WO8A4-JU6SvvkrE0nzPACj4c15 KB—✓3rd
https://cdn-www.cnblogs.com/ng/polyfills-jq6heycx.js0 KB—✓3rd
https://cdn-www.cnblogs.com/ng/main-ia2uqgxu.js0 KB—✓3rd
https://hm.baidu.com/hm.js?866c9be12d4a814454792b1fd0fed29512 KB—✓3rd
https://res.wx.qq.com/open/js/jweixin-1.6.0.js?_=177680418798913 KB—✓3rd

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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
619 KB transferred, 69 requests
PASS
619 KB transferred, 69 requests
Info::
Page weighs 1.1 MB (619 KB transferred)
Info::
69 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
619 KB / 2.4 MB budget
619 KB transferred
69 requests
0.13 g CO2 per page load
Images 350.1 KiB 57%
JavaScript 227.3 KiB 37%
HTML 16.5 KiB 3%
CSS 9.9 KiB 2%
Other 7.4 KiB 1%
Other 7.1 KiB 1%
Other 549 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
JS Execution Cost
440ms total JS execution
PASS
440ms total JS execution
Warning::
https://www.cnblogs.com/: 262ms CPU time
Info::
Unattributable: 114ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-M95P...: 64ms CPU time
Warning::
Third-party scripts: 440ms (100% of total)

Main Thread Breakdown

Style & Layout 34% Other 28% Script Evaluation 25% Rendering 8%
ScriptTotalScriptingParse/CompileParty
https://www.cnblogs.com/262ms2ms1ms3rd
Unattributable114ms2ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-M95P3TTWJZ64ms53ms9ms3rd
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+
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
69 resources · 619 KB · 63 KB savings available
PASS
69 resources · 619 KB · 63 KB savings available
Info::
Within 1MB page-weight target
Got: 619 KB
Info::
~63 KB of savings available
Warning::
68 third-party resources (100% of weight)
69 resources · 618.7 KiB · 68 third-party Within 1MB page-weight target
Image 58% · 357.0 KiB
JavaScript 37% · 227.3 KiB
Document 4% · 22.7 KiB
CSS 2% · 9.9 KiB
Other 0% · 1.8 KiB

~63.1 KiB of savings available

Remove unused JavaScript: 63.1 KiB
Network Waterfall
69 requests over 3807ms
INFO
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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 440ms · 174KB · ¥22/mo
www.cnblogs.com
Other
Costly
Execution 262ms
Transfer 17 KB
Monthly Cost ¥13/mo
Unattributable
Other
Optional
Execution 114ms
Transfer 0 KB
Monthly Cost ¥6/mo
Google Tag Manager
Tag Manager
Optional
Execution 64ms
Transfer 157 KB
Unused 40%
Monthly Cost ¥3/mo

These scripts may cost more than they're worth

  • www.cnblogs.com adds 262ms and costs ~¥13/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.cnblogs.com takes 262ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

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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