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https://flipboard.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
31
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.
96
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.

14.98 s

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

22.78 s

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

47 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.789

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

14.98 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.

23.12 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
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.4 MB transferred, 82 requests
FIX
3.4 MB transferred, 82 requests
Warning::
Page weighs 9.7 MB (3.4 MB transferred)
Warning::
JavaScript is 2.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.1 MB
Info::
Fonts are 908 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 908 KB
Info::
82 HTTP requests
Info::
Estimated 0.72 g CO2 per page load
3.4 MB / 2.4 MB budget
3.4 MB transferred
82 requests
0.72 g CO2 per page load
JavaScript 2.1 MiB 60%
Fonts 907.7 KiB 26%
HTML 218.9 KiB 6%
Images 166.2 KiB 5%
CSS 79.2 KiB 2%
Other 15.4 KiB 0%
Other 4.9 KiB 0%
Other 2.7 KiB 0%
Other 1.6 KiB 0%
Other 1.3 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

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

D
Third-Party Impact
Action
94% third-party, 0 ms blocking
FIX
94% third-party, 0 ms blocking
Warning::
Third-party code accounts for 94% of page weight (3.2 MiB of 3.4 MiB)
Info::
Third-party blocking time is low (0 ms)
94%
First-party Third-party
D
JS Execution Cost
Action
3455ms total JS execution
FIX
3455ms total JS execution
Warning::
https://s.flipboard.com/webu/app.33b744f68f7fbfc02...: 903ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 651ms CPU time
Warning::
https://flipboard.com/: 450ms CPU time
Warning::
Unattributable: 340ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-397...: 298ms CPU time
Warning::
Third-party scripts: 3004ms (87% of total)

Main Thread Breakdown

Script Evaluation 65% Script Parsing & Compilation 16% Other 11% Style & Layout 4%
ScriptTotalScriptingParse/CompileParty
https://s.flipboard.com/webu/app.33b744f68f7fbfc0225f.bundle.js903ms776ms94ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js651ms555ms66ms3rd
https://flipboard.com/450ms83ms118ms1st
Unattributable340ms7ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=UA-39724124-2&cx=c&gtm=4e64k0h2298ms271ms23ms3rd
https://www.googletagmanager.com/gtag/js?id=G-F1YZDD86ZE196ms154ms40ms3rd
https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js182ms150ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-959332650163ms110ms52ms3rd
https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.js110ms79ms30ms3rd
https://s.flipboard.com/webu/4239.dfa453471d21aead4a25.bundle.js98ms21ms68ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
32 scripts, 1.0 MB unused
FIX
32 scripts, 1.0 MB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.flipboard.com/webu/app.33b744f68f7fbfc02...: 163 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-F1YZ...: 106 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.0 MB
1071 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://s.flipboard.com/webu/app.33b744f68f7fbfc0225f.bundle.js270 KB163 KB (60%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-F1YZDD86ZE&cx=c&gtm=4e64h1174 KB106 KB (61%)✓3rd
https://s.flipboard.com/webu/4239.dfa453471d21aead4a25.bundle.js214 KB99 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-39724124-2&cx=c&gtm=4e64k0h2115 KB63 KB (55%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-959332650135 KB56 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-F1YZDD86ZE175 KB53 KB (30%)✓3rd
https://s.flipboard.com/webu/5465.bf61ce8d89386803ca2a.bundle.js3 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

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

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

F
Page Weight Inventory
Action
82 resources · 3.4 MB · 1.0 MB savings available
FIX
82 resources · 3.4 MB · 1.0 MB savings available
Warning::
Page weight 2.4 MB over 1MB target
Got: 3.4 MB Expected: ≤ 1 MB
Info::
~1.0 MB of savings available
Warning::
75 third-party resources (94% of weight)
Info::
4 resources over 200KB
82 resources · 3.4 MiB · 75 third-party 2.4 MiB over 1MB target
JavaScript 60% · 2.1 MiB
Font 26% · 907.7 KiB
Document 6% · 219.3 KiB
Image 5% · 168.9 KiB
CSS 2% · 79.2 KiB
Other 1% · 22.3 KiB

~1.0 MiB of savings available

Remove unused JavaScript: 1.0 MiB
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.

B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 166 KB
0 oversized -0 KB
5 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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
11 fonts (908 KB)
PASS
11 fonts (908 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

908 KB total

Render-blocking

0

of 11

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s FCP 15.0 s LCP 22.8 shttps://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Normal-0efe3aa3.woffFaktFlipboard-Normal-0e... https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Normal-0efe3aa3.woff — 84.5 KiB — 286 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Medium-ff30e15a.woffFaktFlipboard-Medium-ff... https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Medium-ff30e15a.woff — 87.7 KiB — 195 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/FaktFlipboard-SemiBold-9c83663b.woffFaktFlipboard-SemiBold-... https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-SemiBold-9c83663b.woff — 88.6 KiB — 256 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Normal.otfFaktFlipboardCon-Normal... https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Normal.otf — 121.0 KiB — 291 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-SemiBold.otfFaktFlipboardCon-SemiBo... https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-SemiBold.otf — 130.4 KiB — 291 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Black.otfFaktFlipboardCon-Black.otf https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Black.otf — 124.5 KiB — 289 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/TiemposText-Regular.otfTiemposText-Regular.otf https://s.flipboard.com/assets/webu/fonts/TiemposText-Regular.otf — 91.4 KiB — 243 ms — font-display: swaphttps://s.flipboard.com/assets/webu/fonts/TiemposText-Semibold.otfTiemposText-Semibold.otf https://s.flipboard.com/assets/webu/fonts/TiemposText-Semibold.otf — 98.6 KiB — 226 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 83 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2 — 47.2 KiB — 36 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2 — 0 B — 36 ms — font-display: swap
FaktFlipboard-Normal-0e... woff swap
Size 84 KB
Load time 286 ms
Start 262 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
FaktFlipboard-Medium-ff... woff swap
Size 88 KB
Load time 195 ms
Start 262 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
FaktFlipboard-SemiBold-... woff swap
Size 89 KB
Load time 256 ms
Start 262 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
FaktFlipboardCon-Normal... otf swap
Size 121 KB
Load time 291 ms
Start 262 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
FaktFlipboardCon-SemiBo... otf swap
Size 130 KB
Load time 291 ms
Start 263 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
FaktFlipboardCon-Black.otf otf swap
Size 125 KB
Load time 289 ms
Start 263 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
TiemposText-Regular.otf otf swap
Size 91 KB
Load time 243 ms
Start 263 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
TiemposText-Semibold.otf otf swap
Size 99 KB
Load time 226 ms
Start 263 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 83 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 47 KB
Load time 36 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 36 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
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 ~436 KB and ~872 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
82 requests over 2823ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s FCP 15.0 s LCP 22.8 shttps://flipboard.com// https://flipboard.com/ — 200 — 189.0 KiB — 328 ms — h2https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.jscdn.privacy-mgmt.com/unified/wrappe... https://cdn.privacy-mgmt.com/unified/wrapperMessagingWithoutDetection.js — 200 — 40.4 KiB — 1.2 s — h2https://www.googletagmanager.com/gtag/js?id=G-F1YZDD86ZEwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-F1YZDD86ZE — 200 — 175.0 KiB — 183 ms — h2https://s.flipboard.com/webu/app.151b12f0bc4856d14209.csss.flipboard.com/webu/app.151b12f0bc... https://s.flipboard.com/webu/app.151b12f0bc4856d14209.css — 200 — 28.2 KiB — 154 ms — h2https://s.flipboard.com/webu/4239.dfa453471d21aead4a25.bundle.jss.flipboard.com/webu/4239.dfa453471... https://s.flipboard.com/webu/4239.dfa453471d21aead4a25.bundle.js — 200 — 214.0 KiB — 231 ms — h2https://s.flipboard.com/webu/app.33b744f68f7fbfc0225f.bundle.jss.flipboard.com/webu/app.33b744f68f... https://s.flipboard.com/webu/app.33b744f68f7fbfc0225f.bundle.js — 200 — 270.1 KiB — 290 ms — h2https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Normal-0efe3aa3.woffs.flipboard.com/assets/webu/fonts/F... https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Normal-0efe3aa3.woff — 200 — 84.5 KiB — 286 ms — h2https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Medium-ff30e15a.woffs.flipboard.com/assets/webu/fonts/F... https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-Medium-ff30e15a.woff — 200 — 87.7 KiB — 195 ms — h2https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-SemiBold-9c83663b.woffs.flipboard.com/assets/webu/fonts/F... https://s.flipboard.com/assets/webu/fonts/FaktFlipboard-SemiBold-9c83663b.woff — 200 — 88.6 KiB — 256 ms — h2https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Normal.otfs.flipboard.com/assets/webu/fonts/F... https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Normal.otf — 200 — 121.0 KiB — 291 ms — h2https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-SemiBold.otfs.flipboard.com/assets/webu/fonts/F... https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-SemiBold.otf — 200 — 130.4 KiB — 291 ms — h2https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Black.otfs.flipboard.com/assets/webu/fonts/F... https://s.flipboard.com/assets/webu/fonts/FaktFlipboardCon-Black.otf — 200 — 124.5 KiB — 289 ms — h2https://s.flipboard.com/assets/webu/fonts/TiemposText-Regular.otfs.flipboard.com/assets/webu/fonts/T... https://s.flipboard.com/assets/webu/fonts/TiemposText-Regular.otf — 200 — 91.4 KiB — 243 ms — h2https://s.flipboard.com/assets/webu/fonts/TiemposText-Semibold.otfs.flipboard.com/assets/webu/fonts/T... https://s.flipboard.com/assets/webu/fonts/TiemposText-Semibold.otf — 200 — 98.6 KiB — 226 ms — h2https://ic-cdn.flipboard.com/flipboard.com/fd909dcb8147f953a41045b0beabf7f7aff7cdaf/_medium.webpic-cdn.flipboard.com/flipboard.com/... https://ic-cdn.flipboard.com/flipboard.com/fd909dcb8147f953a41045b0beabf7f7aff7cdaf/_medium.webp — 200 — 8.3 KiB — 534 ms — h2https://ic-cdn.flipboard.com/flipboard.com/bd9c94602e7745d405917a2775367ab83792d5f8/_medium.webpic-cdn.flipboard.com/flipboard.com/... https://ic-cdn.flipboard.com/flipboard.com/bd9c94602e7745d405917a2775367ab83792d5f8/_medium.webp — 200 — 14.8 KiB — 142 ms — h2https://cdn.arstechnica.net/wp-content/uploads/2026/04/codxbox-1152x648.jpgcdn.arstechnica.net/wp-content/uplo... https://cdn.arstechnica.net/wp-content/uploads/2026/04/codxbox-1152x648.jpg — 200 — 102.6 KiB — 185 ms — h2https://ic-cdn.flipboard.com/flipboard.com/5b18d37397dd8135baa2c3aea68f1f525c375f44/_medium.webpic-cdn.flipboard.com/flipboard.com/... https://ic-cdn.flipboard.com/flipboard.com/5b18d37397dd8135baa2c3aea68f1f525c375f44/_medium.webp — 200 — 12.9 KiB — 141 ms — h2https://ic-cdn.flipboard.com/flipboard.com/a2f2cfcff92009db4f66c88c2d4e0c9242a5820e/_medium.webpic-cdn.flipboard.com/flipboard.com/... https://ic-cdn.flipboard.com/flipboard.com/a2f2cfcff92009db4f66c88c2d4e0c9242a5820e/_medium.webp — 200 — 10.7 KiB — 441 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-959332650www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-959332650 — 200 — 134.5 KiB — 150 ms — h2https://ic-cdn.flipboard.com/flipboard.com/8e54cd18046ccbe6cf56179bf520342cd2aace1d/_medium.webpic-cdn.flipboard.com/flipboard.com/... https://ic-cdn.flipboard.com/flipboard.com/8e54cd18046ccbe6cf56179bf520342cd2aace1d/_medium.webp — 200 — 13.8 KiB — 468 ms — h2https://sb.scorecardresearch.com/beacon.jssb.scorecardresearch.com/beacon.js https://sb.scorecardresearch.com/beacon.js — 200 — 6.7 KiB — 126 ms — h2https://flipboard.com/manifest.webmanifest/manifest.webmanifest https://flipboard.com/manifest.webmanifest — 200 — 1.6 KiB — 186 ms — h2https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 100 ms — h2https://s.flipboard.com/webu/8983.bfba14849d47a6c7eae5.bundle.jss.flipboard.com/webu/8983.bfba14849... https://s.flipboard.com/webu/8983.bfba14849d47a6c7eae5.bundle.js — 200 — 2.9 KiB — 139 ms — h2https://s.flipboard.com/webu/735.419e8af625ebb12b188f.bundle.jss.flipboard.com/webu/735.419e8af625... https://s.flipboard.com/webu/735.419e8af625ebb12b188f.bundle.js — 200 — 2.9 KiB — 133 ms — h2https://s.flipboard.com/webu/3172.0b11715fd7abd7d13b54.bundle.jss.flipboard.com/webu/3172.0b11715fd... https://s.flipboard.com/webu/3172.0b11715fd7abd7d13b54.bundle.js — 200 — 5.0 KiB — 132 ms — h2https://s.flipboard.com/webu/2181.0d5a9eedf9127236579a.bundle.jss.flipboard.com/webu/2181.0d5a9eedf... https://s.flipboard.com/webu/2181.0d5a9eedf9127236579a.bundle.js — 200 — 10.8 KiB — 144 ms — h2https://s.flipboard.com/webu/6973.a92e9a510bfa087f9ea6.bundle.jss.flipboard.com/webu/6973.a92e9a510... https://s.flipboard.com/webu/6973.a92e9a510bfa087f9ea6.bundle.js — 200 — 7.1 KiB — 141 ms — h2https://s.flipboard.com/webu/3146.3e45c1f8ba3dc75acd24.bundle.jss.flipboard.com/webu/3146.3e45c1f8b... https://s.flipboard.com/webu/3146.3e45c1f8ba3dc75acd24.bundle.js — 200 — 2.3 KiB — 138 ms — h2
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https://www.google.com/ccm/collect?rcb=6&frm=0&en=page_view&dl=https%3A%2F%2Fflipboard.com%2F&scrsrc=www.googletagmanager.com&rnd=1412420570.1776803579&dt=Flipboard%3A%20Your%20Social%20Magazine&auid=565604989.1776803579&navt=n&npa=1&us_privacy=error&gtm=45be64h1za200xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tcfd=1000h&tag_exp=0~115938466~115938468~117266401&apve=1&apvf=f&apvc=1&tids=AW-959332650&tid=AW-959332650&tft=1776803578946&tfd=1381 — 200 — 21 B — 28 ms — h3https://www.google.com/ccm/collect?rcb=16&frm=0&en=page_view&dl=https%3A%2F%2Fflipboard.com%2F&scrsrc=www.googletagmanager.com&rnd=1412420570.1776803579&dt=Flipboard%3A%20Your%20Social%20Magazine&auid=565604989.1776803579&navt=n&npa=1&us_privacy=error&gtm=45je64k0h2v892792978za200xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tcfd=1000h&tag_exp=0~115938466~115938468~117266401&apve=1&apvf=f&apvc=0&tids=AW-10971352451&tid=AW-10971352451&tft=1776803578947&tfd=1382www.google.com/ccm/collect?rcb=16&f... https://www.google.com/ccm/collect?rcb=16&frm=0&en=page_view&dl=https%3A%2F%2Fflipboard.com%2F&scrsrc=www.googletagmanager.com&rnd=1412420570.1776803579&dt=Flipboard%3A%20Your%20Social%20Magazine&auid=565604989.1776803579&navt=n&npa=1&us_privacy=error&gtm=45je64k0h2v892792978za200xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tcfd=1000h&tag_exp=0~115938466~115938468~117266401&apve=1&apvf=f&apvc=0&tids=AW-10971352451&tid=AW-10971352451&tft=1776803578947&tfd=1382 — 200 — 21 B — 29 ms — h3https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-F1YZDD86ZE&cid=1065538452.1776803578&gtm=45je64k0h2v892792978za200&rcb=16&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266401&z=590293963www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-F1YZDD86ZE&cid=1065538452.1776803578&gtm=45je64k0h2v892792978za200&rcb=16&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266401&z=590293963 — 200 — 408 B — 114 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 362.4 KiB — 183 ms — h2https://cdn.privacy-mgmt.com/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.jscdn.privacy-mgmt.com/unified/4.40.1... https://cdn.privacy-mgmt.com/unified/4.40.1/gdpr-tcf.27718c8cb9d29947d2c1.bundle.js — 200 — 24.1 KiB — 39 ms — h2https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.jscdn.privacy-mgmt.com/unified/4.40.1... https://cdn.privacy-mgmt.com/unified/4.40.1/usnat-uspapi.090eccada574d39af6f8.bundle.js — 200 — 33.5 KiB — 49 ms — h2https://cdn.privacy-mgmt.com/mms/v2/get_site_data?hasCsp=true&href=https%3A%2F%2Fflipboard.com%2F&account_id=1142cdn.privacy-mgmt.com/mms/v2/get_sit... https://cdn.privacy-mgmt.com/mms/v2/get_site_data?hasCsp=true&href=https%3A%2F%2Fflipboard.com%2F&account_id=1142 — 200 — 603 B — 109 ms — h2https://cdn.privacy-mgmt.com/wrapper/v2/meta-data?hasCsp=true&accountId=1142&env=prod&metadata=%7B%22gdpr%22%3A%7B%7D%2C%22usnat%22%3A%7B%7D%7D&propertyId=9640&scriptVersion=4.40.1&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/met... https://cdn.privacy-mgmt.com/wrapper/v2/meta-data?hasCsp=true&accountId=1142&env=prod&metadata=%7B%22gdpr%22%3A%7B%7D%2C%22usnat%22%3A%7B%7D%7D&propertyId=9640&scriptVersion=4.40.1&scriptType=unified — 200 — 1.0 KiB — 43 ms — h2https://www.google.com/recaptcha/api2/anchor?ar=1&k=6LcyJpAbAAAAAP0Jt0sy0VR_Zv5toJ0nmlciou2U&co=aHR0cHM6Ly9mbGlwYm9hcmQuY29tOjQ0Mw..&hl=en&v=gTpTIWhbKpxADzTzkcabhXN4&size=invisible&anchor-ms=20000&execute-ms=30000&cb=mc4did606w0twww.google.com/recaptcha/api2/ancho... https://www.google.com/recaptcha/api2/anchor?ar=1&k=6LcyJpAbAAAAAP0Jt0sy0VR_Zv5toJ0nmlciou2U&co=aHR0cHM6Ly9mbGlwYm9hcmQuY29tOjQ0Mw..&hl=en&v=gTpTIWhbKpxADzTzkcabhXN4&size=invisible&anchor-ms=20000&execute-ms=30000&cb=mc4did606w0t — 200 — 27.7 KiB — 81 ms — h3https://cdn.privacy-mgmt.com/wrapper/v2/messages?hasCsp=true&env=prod&body=%7B%22accountId%22%3A1142%2C%22campaignEnv%22%3A%22prod%22%2C%22campaigns%22%3A%7B%22gdpr%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22targetingParams%22%3A%7B%7D%7D%2C%22usnat%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22hasLocalData%22%3Afalse%2C%22targetingParams%22%3A%7B%7D%7D%7D%2C%22clientMMSOrigin%22%3A%22https%3A%2F%2Fcdn.privacy-mgmt.com%22%2C%22hasCSP%22%3Atrue%2C%22includeData%22%3A%7B%22localState%22%3A%7B%22type%22%3A%22string%22%7D%2C%22actions%22%3A%7B%22type%22%3A%22RecordString%22%7D%2C%22cookies%22%3A%7B%22type%22%3A%22RecordString%22%7D%7D%2C%22propertyHref%22%3A%22https%3A%2F%2Fflipboard.com%2F%22%7D&localState=null&metadata=%7B%22gdpr%22%3A%7B%22applies%22%3Atrue%7D%2C%22usnat%22%3A%7B%22applies%22%3Afalse%7D%7D&nonKeyedLocalState=null&ch=4527084434756901037f9b452706096ad54&scriptVersion=4.40.1&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/mes... https://cdn.privacy-mgmt.com/wrapper/v2/messages?hasCsp=true&env=prod&body=%7B%22accountId%22%3A1142%2C%22campaignEnv%22%3A%22prod%22%2C%22campaigns%22%3A%7B%22gdpr%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22targetingParams%22%3A%7B%7D%7D%2C%22usnat%22%3A%7B%22consentStatus%22%3A%7B%7D%2C%22hasLocalData%22%3Afalse%2C%22targetingParams%22%3A%7B%7D%7D%7D%2C%22clientMMSOrigin%22%3A%22https%3A%2F%2Fcdn.privacy-mgmt.com%22%2C%22hasCSP%22%3Atrue%2C%22includeData%22%3A%7B%22localState%22%3A%7B%22type%22%3A%22string%22%7D%2C%22actions%22%3A%7B%22type%22%3A%22RecordString%22%7D%2C%22cookies%22%3A%7B%22type%22%3A%22RecordString%22%7D%7D%2C%22propertyHref%22%3A%22https%3A%2F%2Fflipboard.com%2F%22%7D&localState=null&metadata=%7B%22gdpr%22%3A%7B%22applies%22%3Atrue%7D%2C%22usnat%22%3A%7B%22applies%22%3Afalse%7D%7D&nonKeyedLocalState=null&ch=4527084434756901037f9b452706096ad54&scriptVersion=4.40.1&scriptType=unified — 200 — 7.6 KiB — 146 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/styles__ltr.csswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/styles__ltr.css — 200 — 42.1 KiB — 97 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 361.9 KiB — 163 ms — h2https://s.flipboard.com/webu/app-components-do-not-sell-link.36644af5d1702e62dd30.bundle.jss.flipboard.com/webu/app-components... https://s.flipboard.com/webu/app-components-do-not-sell-link.36644af5d1702e62dd30.bundle.js — 200 — 2.2 KiB — 32 ms — h2https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=4527084434756901037f9b452706096ad54&scriptVersion=4.40.1&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/pv-... https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=4527084434756901037f9b452706096ad54&scriptVersion=4.40.1&scriptType=unified — 200 — 0 B — 44 ms — h2https://cdn.privacy-mgmt.com/index.html?hasCsp=true&message_id=1178627&consentUUID=null&consent_origin=https%3A%2F%2Fcdn.privacy-mgmt.com%2Fconsent%2Ftcfv2&preload_message=true&version=v1cdn.privacy-mgmt.com/index.html?has... https://cdn.privacy-mgmt.com/index.html?hasCsp=true&message_id=1178627&consentUUID=null&consent_origin=https%3A%2F%2Fcdn.privacy-mgmt.com%2Fconsent%2Ftcfv2&preload_message=true&version=v1 — 200 — 2.2 KiB — 95 ms — h2https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=4527084434756901037f9b452706096ad54&scriptVersion=4.40.1&scriptType=unifiedcdn.privacy-mgmt.com/wrapper/v2/pv-... https://cdn.privacy-mgmt.com/wrapper/v2/pv-data?hasCsp=true&env=prod&ch=4527084434756901037f9b452706096ad54&scriptVersion=4.40.1&scriptType=unified — 200 — 730 B — 47 ms — h2https://cdn.privacy-mgmt.com/Notice.30929.csscdn.privacy-mgmt.com/Notice.30929.c... https://cdn.privacy-mgmt.com/Notice.30929.css — 200 — 6.7 KiB — 38 ms — h2https://cdn.privacy-mgmt.com/polyfills.01516.jscdn.privacy-mgmt.com/polyfills.0151... https://cdn.privacy-mgmt.com/polyfills.01516.js — 200 — 2.3 KiB — 38 ms — h2https://cdn.privacy-mgmt.com/Notice.8f529.jscdn.privacy-mgmt.com/Notice.8f529.j... https://cdn.privacy-mgmt.com/Notice.8f529.js — 200 — 91.2 KiB — 85 ms — h2https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4www.google.com/recaptcha/api2/webwo... https://www.google.com/recaptcha/api2/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4 — 200 — 23 B — 178 ms — h3https://www.gstatic.com/recaptcha/api2/logo_48.pngwww.gstatic.com/recaptcha/api2/logo... https://www.gstatic.com/recaptcha/api2/logo_48.png — 200 — 2.3 KiB — 24 ms — h2https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 33.9 KiB — 83 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 0 B — 15 ms — h2https://cdn.privacy-mgmt.com/consent/tcfv2/vendor-list/categories?siteId=9640cdn.privacy-mgmt.com/consent/tcfv2/... https://cdn.privacy-mgmt.com/consent/tcfv2/vendor-list/categories?siteId=9640 — 200 — 2.2 KiB — 41 ms — h2https://flipboard.com/api/v2/reporting/datadog/api/v2/reporting/datadog https://flipboard.com/api/v2/reporting/datadog — 200 — 384 B — 287 ms — h2https://flipboard.com/api/v2/reporting/datadog/api/v2/reporting/datadog https://flipboard.com/api/v2/reporting/datadog — 200 — 381 B — 287 ms — h2https://s.flipboard.com/webapp/images/favicon/favicon-32x32.pngs.flipboard.com/webapp/images/favic... https://s.flipboard.com/webapp/images/favicon/favicon-32x32.png — 200 — 653 B — 36 ms — h2https://s.flipboard.com/assets/webu/images/meta/flipboard-192.pngs.flipboard.com/assets/webu/images/... https://s.flipboard.com/assets/webu/images/meta/flipboard-192.png — 200 — 2.0 KiB — 37 ms — h2https://fonts.googleapis.com/css?family=Open+Sans:400,600,700&display=swapfonts.googleapis.com/css?family=Ope... https://fonts.googleapis.com/css?family=Open+Sans:400,600,700&display=swap — 200 — 2.2 KiB — 94 ms — h2https://cdn.privacy-mgmt.com/consent/tcfv2/vendor-list/categories?siteId=9640&consentLanguage=encdn.privacy-mgmt.com/consent/tcfv2/... https://cdn.privacy-mgmt.com/consent/tcfv2/vendor-list/categories?siteId=9640&consentLanguage=en — 200 — 2.2 KiB — 59 ms — h2https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2 — 200 — 47.2 KiB — 36 ms — h3https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-muw.woff2 — 200 — 0 B — 36 ms — h3https://flipboard.com/api/v2/reporting/datadog/api/v2/reporting/datadog https://flipboard.com/api/v2/reporting/datadog — 200 — 381 B — 378 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
87% of JavaScript execution is third-party
First-party Third-party 3004ms · 1157KB · $40/mo
s.flipboard.com
Other
Costly
Execution 903ms
Transfer 270 KB
Unused 60%
Monthly Cost $12/mo
www.gstatic.com
Other
Costly
Execution 651ms
Transfer 0 KB
Unused 49%
Monthly Cost $9/mo
Unattributable
Other
Costly
Execution 340ms
Transfer 0 KB
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 298ms
Transfer 115 KB
Unused 55%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Optional
Execution 196ms
Transfer 175 KB
Unused 30%
Monthly Cost $3/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 182ms
Transfer 40 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 163ms
Transfer 135 KB
Unused 42%
Monthly Cost $2/mo
cdn.privacy-mgmt.com
Other
Optional
Execution 110ms
Transfer 34 KB
Monthly Cost $1/mo
s.flipboard.com
Other
Optional
Execution 98ms
Transfer 214 KB
Unused 46%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 65ms
Transfer 174 KB
Unused 61%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • s.flipboard.com adds 903ms and costs ~$12/month
  • www.gstatic.com adds 651ms and costs ~$9/month
  • Unattributable adds 340ms and costs ~$5/month
  • Google Tag Manager adds 298ms and costs ~$4/month

87% 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

s.flipboard.com takes 903ms 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

60% of s.flipboard.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

www.gstatic.com takes 651ms 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

Unattributable takes 340ms 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

Google Tag Manager takes 298ms 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

55% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

61% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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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