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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
5
PASS
9
INFO
2

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

Mobile Desktop
88
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
62
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.
92
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.

2.81 s

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

3.26 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

66 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.

2.81 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.

4.96 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
17
9 PASS 5 REVIEW 1 FIX
D
Third-Party Impact
Action
65% third-party, 0 ms blocking
FIX
65% third-party, 0 ms blocking
Warning::
Third-party code accounts for 65% of page weight (588.4 KiB of 902.4 KiB)
Info::
Third-party blocking time is low (0 ms)
35%
65%
First-party Third-party
C
Image Optimization
Action
9 images, 0 KB saveable
REVIEW
9 images, 0 KB saveable
Warning::
https://hexo.io/themes/screenshots/landscape.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.netlify.com/img/global/badges/netlify-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
9 images 313 KB
0 oversized -0 KB
8 legacy format
2 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

B
JS Execution Cost
821ms total JS execution
REVIEW
821ms total JS execution
Warning::
Unattributable: 308ms CPU time
Warning::
https://hexo.io/: 273ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-8VWF...: 180ms CPU time
Info::
https://www.google-analytics.com/analytics.js: 61ms CPU time
Warning::
Third-party scripts: 548ms (67% of total)

Main Thread Breakdown

Script Evaluation 35% Other 28% Style & Layout 24% Script Parsing & Compilation 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable308ms80ms0ms3rd
https://hexo.io/273ms25ms2ms1st
https://www.googletagmanager.com/gtag/js?id=G-8VWFR61YDH&cx=c&_slc=1180ms140ms37ms3rd
https://www.google-analytics.com/analytics.js61ms48ms6ms3rd
B
JS Bundles
7 scripts, 93 KB unused
REVIEW
7 scripts, 93 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-8VWF...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/npm/@docsearch/js@3: 30 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 93 KB
93 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-8VWFR61YDH&cx=c&_slc=1147 KB63 KB (43%)✓3rd
https://cdn.jsdelivr.net/npm/@docsearch/js@336 KB30 KB (83%)✓3rd
https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js1 KB—✓3rd
https://hexo.io/js/lang_select.js0 KB—✓1st
https://hexo.io/js/mobile_nav.js0 KB—✓1st
https://hexo.io/js/colorScheme.js0 KB—✓1st
https://www.google-analytics.com/analytics.js21 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

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

B
HTTP Caching
public,max-age=0,must-revalidate
REVIEW
public,max-age=0,must-revalidate
Info::
Cache-Control header is set
Got: public,max-age=0,must-revalidate
Info::
ETag present — enables conditional (304) responses
Cache-Control

public,max-age=0,must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A
Page Weight Budget
902 KB transferred, 31 requests
PASS
902 KB transferred, 31 requests
Info::
Page weighs 1.4 MB (902 KB transferred)
Info::
Fonts are 340 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 340 KB
Info::
31 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
902 KB / 2.4 MB budget
902 KB transferred
31 requests
0.18 g CO2 per page load
Fonts 340.4 KiB 38%
Images 313.3 KiB 35%
JavaScript 206.6 KiB 23%
CSS 35.9 KiB 4%
HTML 4.0 KiB 0%
Other 795 B 0%
Other 552 B 0%
Other 543 B 0%
Other 459 B 0%
0 2.4 MB 4.9 MB
Under 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

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
5 fonts (340 KB)
PASS
5 fonts (340 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

340 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 2.8 s LCP 3.3 shttps://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-300.woff2lato-latin-300.woff2 https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-300.woff2 — 23.1 KiB — 15 ms — font-display: swaphttps://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-solid-900.woff2 — 154.9 KiB — 17 ms — font-display: swaphttps://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-400.woff2lato-latin-400.woff2 https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-400.woff2 — 23.3 KiB — 17 ms — font-display: swaphttps://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-700.woff2lato-latin-700.woff2 https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-700.woff2 — 22.8 KiB — 5 ms — font-display: swaphttps://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-brands-400.woff2 — 116.3 KiB — 18 ms — font-display: swap
lato-latin-300.woff2 woff2 swap
Size 23 KB
Load time 15 ms
Start 231 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 155 KB
Load time 17 ms
Start 233 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
lato-latin-400.woff2 woff2 swap
Size 23 KB
Load time 17 ms
Start 233 ms
Risk FOUT — text flashes from fallback to web font
lato-latin-700.woff2 woff2 swap
Size 23 KB
Load time 5 ms
Start 233 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 18 ms
Start 233 ms
Risk FOUT — text flashes from fallback to web font
  • 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 ~136 KB and ~272 ms

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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 resource hints configured

A
Page Weight Inventory
31 resources · 902 KB · 93 KB savings available
PASS
31 resources · 902 KB · 93 KB savings available
Info::
Within 1MB page-weight target
Got: 902 KB
Info::
~93 KB of savings available
Warning::
23 third-party resources (65% of weight)
Info::
1 resources over 200KB
31 resources · 902.4 KiB · 23 third-party Within 1MB page-weight target
Font 38% · 340.4 KiB
Image 35% · 313.7 KiB
JavaScript 23% · 206.6 KiB
CSS 4% · 35.9 KiB
Document 0% · 4.0 KiB
Other 0% · 1.9 KiB

~93.0 KiB of savings available

Remove unused JavaScript: 93.0 KiB
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
Network Waterfall
31 requests over 736ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.8 s LCP 3.3 shttps://hexo.io// https://hexo.io/ — 200 — 4.0 KiB — 114 ms — h2https://hexo.io/css/navy.css/css/navy.css https://hexo.io/css/navy.css — 200 — 5.2 KiB — 40 ms — h2https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/index.min.csscdn.jsdelivr.net/npm/typeface-lato@... https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/index.min.css — 200 — 1013 B — 47 ms — h2https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/css/all.min.csscdn.jsdelivr.net/npm/@fortawesome/f... https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/css/all.min.css — 200 — 21.8 KiB — 52 ms — h2https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.csscdn.jsdelivr.net/docsearch.js/1/doc... https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css — 200 — 4.4 KiB — 49 ms — h2https://cdn.jsdelivr.net/npm/@docsearch/css@3cdn.jsdelivr.net/npm/@docsearch/css... https://cdn.jsdelivr.net/npm/@docsearch/css@3 — 200 — 3.4 KiB — 49 ms — h2https://img.shields.io/github/stars/hexojs/hexo?style=socialimg.shields.io/github/stars/hexojs/... https://img.shields.io/github/stars/hexojs/hexo?style=social — 200 — 2.2 KiB — 325 ms — h3https://img.shields.io/github/forks/hexojs/hexo?style=socialimg.shields.io/github/forks/hexojs/... https://img.shields.io/github/forks/hexojs/hexo?style=social — 200 — 2.3 KiB — 309 ms — h3https://img.shields.io/npm/dm/hexo?logo=npm&style=socialimg.shields.io/npm/dm/hexo?logo=npm... https://img.shields.io/npm/dm/hexo?logo=npm&style=social — 200 — 1.7 KiB — 154 ms — h3https://img.shields.io/twitter/follow/hexojs?style=socialimg.shields.io/twitter/follow/hexoj... https://img.shields.io/twitter/follow/hexojs?style=social — 200 — 1.7 KiB — 35 ms — h3https://hexo.io/themes/screenshots/landscape.png/themes/screenshots/landscape.png https://hexo.io/themes/screenshots/landscape.png — 200 — 302.4 KiB — 178 ms — h2https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.jscdn.jsdelivr.net/npm/js-cookie@2/sr... https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js — 200 — 1.3 KiB — 10 ms — h2https://hexo.io/js/lang_select.js/js/lang_select.js https://hexo.io/js/lang_select.js — 200 — 488 B — 178 ms — h2https://hexo.io/js/mobile_nav.js/js/mobile_nav.js https://hexo.io/js/mobile_nav.js — 200 — 479 B — 241 ms — h2https://hexo.io/js/colorScheme.js/js/colorScheme.js https://hexo.io/js/colorScheme.js — 200 — 279 B — 178 ms — h2https://cdn.jsdelivr.net/npm/@docsearch/js@3cdn.jsdelivr.net/npm/@docsearch/js@... https://cdn.jsdelivr.net/npm/@docsearch/js@3 — 200 — 35.9 KiB — 11 ms — h2https://www.netlify.com/img/global/badges/netlify-dark.svgwww.netlify.com/img/global/badges/n... https://www.netlify.com/img/global/badges/netlify-dark.svg — 301 — 359 B — 141 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 117 ms — h2https://hexo.io/logo.svg/logo.svg https://hexo.io/logo.svg — 200 — 822 B — 39 ms — h2https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-300.woff2cdn.jsdelivr.net/npm/typeface-lato@... https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-300.woff2 — 200 — 23.1 KiB — 15 ms — h3https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-solid-900.woff2cdn.jsdelivr.net/npm/@fortawesome/f... https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-solid-900.woff2 — 200 — 154.9 KiB — 17 ms — h3https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-400.woff2cdn.jsdelivr.net/npm/typeface-lato@... https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-400.woff2 — 200 — 23.3 KiB — 17 ms — h3https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-700.woff2cdn.jsdelivr.net/npm/typeface-lato@... https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/files/lato-latin-700.woff2 — 200 — 22.8 KiB — 5 ms — h3https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-brands-400.woff2cdn.jsdelivr.net/npm/@fortawesome/f... https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/webfonts/fa-brands-400.woff2 — 200 — 116.3 KiB — 18 ms — h3https://www.google-analytics.com/j/collect?v=1&_v=j102&a=216486697&t=pageview&_s=1&dl=https%3A%2F%2Fhexo.io%2F&ul=en-us&dt=Hexo&sr=412x823&vp=412x823&_u=IEBAAEABAAAAACAAI~&jid=1505770489&gjid=963241164&cid=1080808032.1776897796&tid=UA-48498357-3&_gid=1042171888.1776897796&_r=1&_slc=1&z=1003612274www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=216486697&t=pageview&_s=1&dl=https%3A%2F%2Fhexo.io%2F&ul=en-us&dt=Hexo&sr=412x823&vp=412x823&_u=IEBAAEABAAAAACAAI~&jid=1505770489&gjid=963241164&cid=1080808032.1776897796&tid=UA-48498357-3&_gid=1042171888.1776897796&_r=1&_slc=1&z=1003612274 — 200 — 459 B — 29 ms — h2https://www.netlify.com/assets/badges/netlify-badge-dark.svgwww.netlify.com/assets/badges/netli... https://www.netlify.com/assets/badges/netlify-badge-dark.svg — 200 — 1.8 KiB — 33 ms — h2https://www.googletagmanager.com/gtag/js?id=G-8VWFR61YDH&cx=c&_slc=1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-8VWFR61YDH&cx=c&_slc=1 — 200 — 147.4 KiB — 170 ms — h2https://region1.analytics.google.com/g/collect?v=2&tid=G-8VWFR61YDH&gtm=45je64m0h2v9109759904za20g&_p=1776897795729&_gaz=1&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=EBAIAGA&are=1&cid=1080808032.1776897796&frm=0&ir=1&pscdl=noapi&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266401~117384406~117512542~118463262&dl=https%3A%2F%2Fhexo.io%2F&dt=Hexo&sid=1776897795&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=590region1.analytics.google.com/g/coll... https://region1.analytics.google.com/g/collect?v=2&tid=G-8VWFR61YDH&gtm=45je64m0h2v9109759904za20g&_p=1776897795729&_gaz=1&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=EBAIAGA&are=1&cid=1080808032.1776897796&frm=0&ir=1&pscdl=noapi&rcb=8&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938468~117266401~117384406~117512542~118463262&dl=https%3A%2F%2Fhexo.io%2F&dt=Hexo&sid=1776897795&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=590 — 204 — 543 B — 114 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-8VWFR61YDH&cid=1080808032.1776897796&gtm=45je64m0h2v9109759904za20g&rcb=8&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l2l1&npa=0&frm=0&tag_exp=0~115938465~115938468~117266401~117384406~117512542~118463262stats.g.doubleclick.net/g/collect?v... 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0 ms 1.0 s 2.0 s 3.0 s FCP 2.8 s LCP 3.3 shttps://hexo.io// https://hexo.io/ — 200 — 4.0 KiB — 114 ms — h2https://hexo.io/css/navy.css/css/navy.css https://hexo.io/css/navy.css — 200 — 5.2 KiB — 40 ms — h2https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/index.min.csscdn.jsdelivr.net/npm/typeface-lato@... https://cdn.jsdelivr.net/npm/typeface-lato@0.0.75/index.min.css — 200 — 1013 B — 47 ms — h2https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/css/all.min.csscdn.jsdelivr.net/npm/@fortawesome/f... https://cdn.jsdelivr.net/npm/@fortawesome/fontawesome-free@6/css/all.min.css — 200 — 21.8 KiB — 52 ms — h2https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.csscdn.jsdelivr.net/docsearch.js/1/doc... https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css — 200 — 4.4 KiB — 49 ms — h2https://cdn.jsdelivr.net/npm/@docsearch/css@3cdn.jsdelivr.net/npm/@docsearch/css... https://cdn.jsdelivr.net/npm/@docsearch/css@3 — 200 — 3.4 KiB — 49 ms — 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436 B — 37 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
67% of JavaScript execution is third-party
First-party Third-party 548ms · 168KB · €6/mo
Unattributable
Other
Costly
Execution 308ms
Transfer 0 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 180ms
Transfer 147 KB
Unused 43%
Monthly Cost €2/mo
Google Analytics
Analytics
Optional
Execution 61ms
Transfer 21 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 308ms and costs ~€3/month

67% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 308ms 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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