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https://ghost.org

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
84
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
92
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.

1.10 s

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

4.42 s

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

98 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.

1.10 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.

26.23 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
14
8 PASS 3 REVIEW 1 FIX
F
Page Weight Budget
Action
5.1 MB transferred, 70 requests
FIX
5.1 MB transferred, 70 requests
Critical::
Page weighs 5.4 MB (5.1 MB transferred)
Info::
Fonts are 4.6 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 4.6 MB
Info::
70 HTTP requests
Info::
Estimated 1.1 g CO2 per page load
5.1 MB / 2.4 MB budget
5.1 MB transferred
70 requests
1.1 g CO2 per page load
Fonts 4.6 MiB 89%
Images 477.1 KiB 9%
JavaScript 50.5 KiB 1%
CSS 20.3 KiB 0%
HTML 18.3 KiB 0%
Other 3.8 KiB 0%
Other 500 B 0%
Other 307 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

C
JS Execution Cost
Action
1371ms total JS execution
REVIEW
1371ms total JS execution
Warning::
https://ghost.org/: 629ms CPU time
Warning::
Unattributable: 621ms CPU time
Info::
https://ghost.org/js/app.min.js: 122ms CPU time
Info::
Third-party scripts: 621ms (45% of total)

Main Thread Breakdown

Other 47% Style & Layout 29% Script Evaluation 13% Rendering 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://ghost.org/629ms21ms3ms1st
Unattributable621ms7ms0ms3rd
https://ghost.org/js/app.min.js122ms106ms14ms1st
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+
Third-Party Impact
0% third-party, 0 ms blocking
PASS
0% third-party, 0 ms blocking
Info::
Third-party code accounts for 0% of page weight (7.9 KiB of 5.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
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+
Image Optimization
21 images, 0 KB saveable
PASS
21 images, 0 KB saveable
Info::
All images are well-optimized
21 images 477 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
38 fonts (4689 KB)
PASS
38 fonts (4689 KB)
Info::
38 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

38

4689 KB total

Render-blocking

0

of 38

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 4.0 s FCP 1.1 s LCP 4.4 shttps://ghost.org/fonts/InterVariable.woff2InterVariable.woff2 https://ghost.org/fonts/InterVariable.woff2 — 337.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterVariable-Italic.woff2InterVariable-Italic.woff2 https://ghost.org/fonts/InterVariable-Italic.woff2 — 372.3 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Thin.woff2Inter-Thin.woff2 https://ghost.org/fonts/Inter-Thin.woff2 — 105.4 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-ThinItalic.woff2Inter-ThinItalic.woff2 https://ghost.org/fonts/Inter-ThinItalic.woff2 — 111.0 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-ExtraLight.woff2Inter-ExtraLight.woff2 https://ghost.org/fonts/Inter-ExtraLight.woff2 — 107.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-ExtraLightItalic.woff2Inter-ExtraLightItalic.... https://ghost.org/fonts/Inter-ExtraLightItalic.woff2 — 113.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Light.woff2Inter-Light.woff2 https://ghost.org/fonts/Inter-Light.woff2 — 107.6 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-LightItalic.woff2Inter-LightItalic.woff2 https://ghost.org/fonts/Inter-LightItalic.woff2 — 114.0 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Regular.woff2Inter-Regular.woff2 https://ghost.org/fonts/Inter-Regular.woff2 — 106.1 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Italic.woff2Inter-Italic.woff2 https://ghost.org/fonts/Inter-Italic.woff2 — 112.1 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Medium.woff2Inter-Medium.woff2 https://ghost.org/fonts/Inter-Medium.woff2 — 109.0 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-MediumItalic.woff2Inter-MediumItalic.woff2 https://ghost.org/fonts/Inter-MediumItalic.woff2 — 115.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-SemiBold.woff2Inter-SemiBold.woff2 https://ghost.org/fonts/Inter-SemiBold.woff2 — 109.1 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-SemiBoldItalic.woff2Inter-SemiBoldItalic.woff2 https://ghost.org/fonts/Inter-SemiBoldItalic.woff2 — 115.6 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Bold.woff2Inter-Bold.woff2 https://ghost.org/fonts/Inter-Bold.woff2 — 108.6 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-BoldItalic.woff2Inter-BoldItalic.woff2 https://ghost.org/fonts/Inter-BoldItalic.woff2 — 115.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-ExtraBold.woff2Inter-ExtraBold.woff2 https://ghost.org/fonts/Inter-ExtraBold.woff2 — 108.9 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-ExtraBoldItalic.woff2Inter-ExtraBoldItalic.w... https://ghost.org/fonts/Inter-ExtraBoldItalic.woff2 — 117.2 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-Black.woff2Inter-Black.woff2 https://ghost.org/fonts/Inter-Black.woff2 — 106.4 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/Inter-BlackItalic.woff2Inter-BlackItalic.woff2 https://ghost.org/fonts/Inter-BlackItalic.woff2 — 112.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Thin.woff2InterDisplay-Thin.woff2 https://ghost.org/fonts/InterDisplay-Thin.woff2 — 103.9 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-ThinItalic.woff2InterDisplay-ThinItalic... https://ghost.org/fonts/InterDisplay-ThinItalic.woff2 — 110.7 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-ExtraLight.woff2InterDisplay-ExtraLight... https://ghost.org/fonts/InterDisplay-ExtraLight.woff2 — 108.5 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-ExtraLightItalic.woff2InterDisplay-ExtraLight... https://ghost.org/fonts/InterDisplay-ExtraLightItalic.woff2 — 114.5 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Light.woff2InterDisplay-Light.woff2 https://ghost.org/fonts/InterDisplay-Light.woff2 — 107.4 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-LightItalic.woff2InterDisplay-LightItali... https://ghost.org/fonts/InterDisplay-LightItalic.woff2 — 114.3 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Regular.woff2InterDisplay-Regular.woff2 https://ghost.org/fonts/InterDisplay-Regular.woff2 — 103.3 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Italic.woff2InterDisplay-Italic.woff2 https://ghost.org/fonts/InterDisplay-Italic.woff2 — 110.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Medium.woff2InterDisplay-Medium.woff2 https://ghost.org/fonts/InterDisplay-Medium.woff2 — 107.6 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-MediumItalic.woff2InterDisplay-MediumItal... https://ghost.org/fonts/InterDisplay-MediumItalic.woff2 — 116.2 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-SemiBold.woff2InterDisplay-SemiBold.w... https://ghost.org/fonts/InterDisplay-SemiBold.woff2 — 107.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-SemiBoldItalic.woff2InterDisplay-SemiBoldIt... https://ghost.org/fonts/InterDisplay-SemiBoldItalic.woff2 — 115.0 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Bold.woff2InterDisplay-Bold.woff2 https://ghost.org/fonts/InterDisplay-Bold.woff2 — 107.8 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-BoldItalic.woff2InterDisplay-BoldItalic... https://ghost.org/fonts/InterDisplay-BoldItalic.woff2 — 115.0 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-ExtraBold.woff2InterDisplay-ExtraBold.... https://ghost.org/fonts/InterDisplay-ExtraBold.woff2 — 107.9 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-ExtraBoldItalic.woff2InterDisplay-ExtraBoldI... https://ghost.org/fonts/InterDisplay-ExtraBoldItalic.woff2 — 115.2 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-Black.woff2InterDisplay-Black.woff2 https://ghost.org/fonts/InterDisplay-Black.woff2 — 104.9 KiB — 0 ms — font-display: swaphttps://ghost.org/fonts/InterDisplay-BlackItalic.woff2InterDisplay-BlackItali... https://ghost.org/fonts/InterDisplay-BlackItalic.woff2 — 111.9 KiB — 0 ms — font-display: swap
InterVariable.woff2 woff2 swap
Size 338 KB
Load time 0 ms
Start 0 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
InterVariable-Italic.woff2 woff2 swap
Size 372 KB
Load time 0 ms
Start 0 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
Inter-Thin.woff2 woff2 swap
Size 105 KB
Load time 0 ms
Start 0 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
Inter-ThinItalic.woff2 woff2 swap
Size 111 KB
Load time 0 ms
Start 0 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
Inter-ExtraLight.woff2 woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
Inter-ExtraLightItalic.... woff2 swap
Size 114 KB
Load time 0 ms
Start 0 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
Inter-Light.woff2 woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
Inter-LightItalic.woff2 woff2 swap
Size 114 KB
Load time 0 ms
Start 0 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
Inter-Regular.woff2 woff2 swap
Size 106 KB
Load time 0 ms
Start 0 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
Inter-Italic.woff2 woff2 swap
Size 112 KB
Load time 0 ms
Start 0 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
Inter-Medium.woff2 woff2 swap
Size 109 KB
Load time 0 ms
Start 0 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
Inter-MediumItalic.woff2 woff2 swap
Size 116 KB
Load time 0 ms
Start 0 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
Inter-SemiBold.woff2 woff2 swap
Size 109 KB
Load time 0 ms
Start 0 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
Inter-SemiBoldItalic.woff2 woff2 swap
Size 116 KB
Load time 0 ms
Start 0 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
Inter-Bold.woff2 woff2 swap
Size 109 KB
Load time 0 ms
Start 0 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
Inter-BoldItalic.woff2 woff2 swap
Size 116 KB
Load time 0 ms
Start 0 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
Inter-ExtraBold.woff2 woff2 swap
Size 109 KB
Load time 0 ms
Start 0 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
Inter-ExtraBoldItalic.w... woff2 swap
Size 117 KB
Load time 0 ms
Start 0 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
Inter-Black.woff2 woff2 swap
Size 106 KB
Load time 0 ms
Start 0 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
Inter-BlackItalic.woff2 woff2 swap
Size 113 KB
Load time 0 ms
Start 0 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
InterDisplay-Thin.woff2 woff2 swap
Size 104 KB
Load time 0 ms
Start 0 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
InterDisplay-ThinItalic... woff2 swap
Size 111 KB
Load time 0 ms
Start 0 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
InterDisplay-ExtraLight... woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
InterDisplay-ExtraLight... woff2 swap
Size 115 KB
Load time 0 ms
Start 0 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
InterDisplay-Light.woff2 woff2 swap
Size 107 KB
Load time 0 ms
Start 0 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
InterDisplay-LightItali... woff2 swap
Size 114 KB
Load time 0 ms
Start 0 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
InterDisplay-Regular.woff2 woff2 swap
Size 103 KB
Load time 0 ms
Start 0 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
InterDisplay-Italic.woff2 woff2 swap
Size 111 KB
Load time 0 ms
Start 0 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
InterDisplay-Medium.woff2 woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
InterDisplay-MediumItal... woff2 swap
Size 116 KB
Load time 0 ms
Start 0 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
InterDisplay-SemiBold.w... woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
InterDisplay-SemiBoldIt... woff2 swap
Size 115 KB
Load time 0 ms
Start 0 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
InterDisplay-Bold.woff2 woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
InterDisplay-BoldItalic... woff2 swap
Size 115 KB
Load time 0 ms
Start 0 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
InterDisplay-ExtraBold.... woff2 swap
Size 108 KB
Load time 0 ms
Start 0 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
InterDisplay-ExtraBoldI... woff2 swap
Size 115 KB
Load time 0 ms
Start 0 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
InterDisplay-Black.woff2 woff2 swap
Size 105 KB
Load time 0 ms
Start 0 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
InterDisplay-BlackItali... woff2 swap
Size 112 KB
Load time 0 ms
Start 0 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 ~2345 KB and ~4690 ms

A+
JS Bundles
6 scripts, 26 KB unused
PASS
6 scripts, 26 KB unused
Warning::
https://ghost.org/js/app.min.js: 26 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 26 KB
26 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ghost.org/js/app.min.js37 KB26 KB (73%)✓1st
https://ghost.org/js/script.js2 KB—✓1st
https://cdn.firstpromoter.com/fpr.js2 KB—✓3rd
https://www.dubcdn.com/analytics/script.js2 KB—✓3rd
https://analytics.ahrefs.com/analytics.js3 KB—✓3rd
https://ghost.org/.netlify/scripts/rum4 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

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
40 hints, 0 missing preconnects
PASS
40 hints, 0 missing preconnects
Info::
Page uses 40 resource hint(s)

Current Resource Hints

preconnect
1
preload
+29
39
dns-prefetch
—
prefetch
—

40 resource hints configured

Network Waterfall
70 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
45% of JavaScript execution is third-party
First-party Third-party 621ms · 0KB · £2/mo
Unattributable
Other
Costly
Execution 621ms
Transfer 0 KB
Monthly Cost £2/mo

These scripts may cost more than they're worth

  • Unattributable adds 621ms and costs ~£2/month

45% 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 621ms 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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