Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
5.40 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
23.23 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.23 s
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.
7.25 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.
25.75 s
Page Load Progression
FPage Weight BudgetAction5.0 MB transferred, 121 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
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.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
FJS Execution CostAction25933ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://static.anyflip.com/web/bookcase/js/Bookcase.min.js?1260271651a89e8026d461d5812ad3477 | 14986ms | 2106ms | 7ms | 3rd |
| Unattributable | 5874ms | 12ms | 0ms | 3rd |
| https://consent.cookiebot.com/482b3f90-6867-4440-8ae8-bff5dcb417ca/cc.js?renew=false&referer=anyflip.com&dnt=false&init=false&framework=TCFv2.3 | 1014ms | 830ms | 117ms | 3rd |
| https://static.anyflip.com/web/js/jquery-1.10.2.min.js | 871ms | 377ms | 44ms | 3rd |
| https://anyflip.com/metrics/ | 667ms | 437ms | 215ms | 1st |
| https://anyflip.com/metrics/?id=AW-17851242551&cx=c>m=4e64k0h2 | 568ms | 359ms | 204ms | 1st |
| https://anyflip.com/ | 400ms | 31ms | 9ms | 1st |
| https://consent.cookiebot.com/uc.js | 376ms | 345ms | 16ms | 3rd |
| https://anyflip.com/metrics/?id=G-FYXHC21YH4&cx=c>m=4e64k0h2 | 350ms | 281ms | 67ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=AW-632065752 | 298ms | 218ms | 69ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction25 scripts, 626 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-559MM74 | 148 KB | 108 KB (73%) | ✓ | 3rd |
| https://anyflip.com/metrics/ | 0 KB | 84 KB (55%) | ✓ | 1st |
| https://anyflip.com/metrics/ | 153 KB | 84 KB (55%) | ✓ | 1st |
| https://anyflip.com/metrics/?id=G-FYXHC21YH4&cx=c>m=4e64k0h2 | 176 KB | 75 KB (42%) | ✓ | 1st |
| https://anyflip.com/metrics/?id=AW-17851242551&cx=c>m=4e64k0h2 | 0 KB | 61 KB (43%) | ✓ | 1st |
| https://anyflip.com/metrics/?id=AW-17851242551&cx=c>m=4e64k0h2 | 142 KB | 61 KB (43%) | ✓ | 1st |
| https://consent.cookiebot.com/Framework/IAB/consent-sdk-2.3.js | 88 KB | 57 KB (65%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-632065752 | 137 KB | 51 KB (37%) | ✓ | 3rd |
| https://anyflip.com/js/build/build.min.js?40cd034ac4a881f47feb208a13e0eaf2 | 63 KB | 45 KB (72%) | ✓ | 1st |
| https://consent.cookiebot.com/482b3f90-6867-4440-8ae8-bff5dcb417ca/cc.js?renew=false&referer=anyflip.com&dnt=false&init=false&framework=TCFv2.3 | 187 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
DPage Weight InventoryAction121 resources · 5.0 MB · 626 KB savings availableFIX
~626.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 121 resources | 5.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction76 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
AThird-Party Impact34% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (516 KB)PASS
Web fonts
4
516 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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
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 ~369 KB and ~738 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall121 requests over 39947msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
static.anyflip.com static.anyflip.com | Other | 14986ms | 14 KB | — | €163/mo | Costly |
Unattributable Unattributable | Other | 5874ms | 0 KB | — | €64/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 1014ms | 187 KB | — | €11/mo | Costly |
static.anyflip.com static.anyflip.com | Other | 871ms | 0 KB | — | €9/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 376ms | 36 KB | — | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 298ms | 137 KB | 37% | €3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 86ms | 148 KB | 73% | €1/mo | Optional |
consent.cookiebot.com consent.cookiebot.com | Other | 77ms | 88 KB | 65% | €1/mo | Optional |
These scripts may cost more than they're worth
- static.anyflip.com adds 14986ms and costs ~€163/month
- Unattributable adds 5874ms and costs ~€64/month
- consent.cookiebot.com adds 1014ms and costs ~€11/month
- static.anyflip.com adds 871ms and costs ~€9/month
- consent.cookiebot.com adds 376ms and costs ~€4/month
- Google Tag Manager adds 298ms and costs ~€3/month
91% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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
static.anyflip.com takes 14986ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 5874ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
consent.cookiebot.com takes 1014ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
static.anyflip.com takes 871ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
consent.cookiebot.com takes 376ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
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.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
73% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
65% of consent.cookiebot.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev