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.
2.50 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.72 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.14 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.136
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
9.33 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.
30.11 s
Page Load Progression
FPage Weight BudgetAction5.1 MB transferred, 113 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
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 CostAction8913ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://fliphtml5.com/ | 1870ms | 18ms | 2ms | 1st |
| https://js.intercomcdn.com/vendor-modern.80eace52.js | 1140ms | 934ms | 61ms | 3rd |
| https://js.intercomcdn.com/app~tooltips-modern.e89b741f.js | 997ms | 947ms | 32ms | 3rd |
| https://consent.cookiebot.com/uc.js | 995ms | 842ms | 27ms | 3rd |
| Unattributable | 944ms | 34ms | 0ms | 3rd |
| https://consent.cookiebot.com/8d1138e9-ab20-4cf4-8779-baf202a04604/cc.js?renew=false&referer=fliphtml5.com&dnt=false&init=false&framework=TCFv2.3 | 504ms | 378ms | 123ms | 3rd |
| https://fliphtml5.com/ycng/ | 474ms | 375ms | 95ms | 1st |
| https://fliphtml5.com/ycng/?id=G-DQQGBZ508R&cx=c>m=4e64h1 | 426ms | 323ms | 75ms | 1st |
| https://fliphtml5.com/ycng/?id=AW-605106599&cx=c>m=4e64h1 | 358ms | 292ms | 63ms | 1st |
| https://connect.facebook.net/en_US/fbevents.js | 232ms | 183ms | 47ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction44 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://js.intercomcdn.com/app-modern.1e25947e.js | 211 KB | 147 KB (70%) | ✓ | 3rd |
| https://js.intercomcdn.com/frame-modern.db2b74ec.js | 193 KB | 118 KB (61%) | ✓ | 3rd |
| https://fliphtml5.com/js/build/build.min.js?09929a58f7ad2d553b18968b6b954545 | 125 KB | 104 KB (84%) | ✓ | 1st |
| https://fliphtml5.com/js/build/build.min.js?09929a58f7ad2d553b18968b6b954545 | 0 KB | 104 KB (84%) | ✓ | 1st |
| https://accounts.google.com/gsi/client | 96 KB | 81 KB (85%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 0 KB | 81 KB (85%) | ✓ | 3rd |
| https://js.intercomcdn.com/vendors~app-modern.f9e006dc.js | 114 KB | 77 KB (68%) | ✓ | 3rd |
| https://fliphtml5.com/ycng/?id=G-DQQGBZ508R&cx=c>m=4e64h1 | 177 KB | 73 KB (41%) | ✓ | 1st |
| https://fliphtml5.com/ycng/ | 181 KB | 66 KB (36%) | ✓ | 1st |
| https://fliphtml5.com/ycng/?id=AW-605106599&cx=c>m=4e64h1 | 150 KB | 61 KB (41%) | ✓ | 1st |
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
FPage Weight InventoryAction113 resources · 5.1 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 113 resources | 5.1 MiB | ||||||
BImage Optimization50 images, 0 KB saveableREVIEW
AThird-Party Impact30% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (97 KB)PASS
Web fonts
1
97 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
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
A+HTTP Cachingmax-age=120 (2 minutes)PASS
max-age=120
| Directive | Value | Meaning |
|---|---|---|
| max-age | 120 | Cache for 2 minutes |
Network Waterfall113 requests over 3919msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
js.intercomcdn.com js.intercomcdn.com | Other | 1140ms | 144 KB | 37% | €18/mo | Costly |
js.intercomcdn.com js.intercomcdn.com | Other | 997ms | 68 KB | 54% | €16/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 995ms | 27 KB | — | €16/mo | Costly |
Unattributable Unattributable | Other | 944ms | 0 KB | — | €15/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 504ms | 187 KB | — | €8/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 232ms | 97 KB | 36% | €4/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 226ms | 45 KB | — | €4/mo | Costly |
js.intercomcdn.com js.intercomcdn.com | Other | 154ms | 196 KB | 29% | €2/mo | Optional |
js.intercomcdn.com js.intercomcdn.com | Other | 95ms | 211 KB | 70% | €2/mo | Optional |
js.intercomcdn.com js.intercomcdn.com | Other | 92ms | 193 KB | 61% | €1/mo | Optional |
consent.cookiebot.com consent.cookiebot.com | Other | 74ms | 88 KB | 65% | €1/mo | Optional |
js.intercomcdn.com js.intercomcdn.com | Other | 70ms | 114 KB | 68% | €1/mo | Optional |
accounts.google.com accounts.google.com | Other | 59ms | 0 KB | 85% | €1/mo | Optional |
Intercom Widget widget.intercom.io | Chat | 53ms | 4 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- js.intercomcdn.com adds 1140ms and costs ~€18/month
- js.intercomcdn.com adds 997ms and costs ~€16/month
- consent.cookiebot.com adds 995ms and costs ~€16/month
- Unattributable adds 944ms and costs ~€15/month
- consent.cookiebot.com adds 504ms and costs ~€8/month
- Facebook Pixel adds 232ms and costs ~€4/month
- Facebook Pixel adds 226ms and costs ~€4/month
63% of JavaScript execution time comes from third-party scripts.
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
js.intercomcdn.com takes 1140ms 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
js.intercomcdn.com takes 997ms 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
54% of js.intercomcdn.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
consent.cookiebot.com takes 995ms 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 944ms 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 504ms 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
Facebook Pixel takes 232ms 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
Facebook Pixel takes 226ms 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
70% of js.intercomcdn.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
61% of js.intercomcdn.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
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
68% of js.intercomcdn.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
85% of accounts.google.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