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.
2.43 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
13.20 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.22 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.87 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.
22.37 s
Page Load Progression
FPage Weight BudgetAction4.4 MB transferred, 187 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 CostAction6631ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 1259ms | 11ms | 0ms | 3rd |
| https://consent.cookiebot.com/uc.js | 1207ms | 1075ms | 26ms | 3rd |
| https://pubhtml5.com/ | 793ms | 20ms | 4ms | 1st |
| https://pubhtml5.com/metrics/ | 656ms | 354ms | 273ms | 1st |
| https://pubhtml5.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 615ms | 577ms | 15ms | 1st |
| https://pubhtml5.com/metrics/?id=AW-17851241108&cx=c>m=4e64k0 | 529ms | 314ms | 212ms | 1st |
| https://consent.cookiebot.com/b9ce1f75-4bbf-4d48-bc8c-edd93ea2562b/cc.js?renew=false&referer=pubhtml5.com&dnt=false&init=false&framework=TCFv2.3 | 423ms | 301ms | 118ms | 3rd |
| https://pubhtml5.com/js/jquery-1.10.2.min.js?v-1 | 291ms | 183ms | 18ms | 1st |
| https://pubhtml5.com/metrics/?id=G-L3MFCR9YTM&cx=c>m=4e64k0 | 270ms | 192ms | 75ms | 1st |
| https://pubhtml5.com/bookcase/asff/ | 149ms | 42ms | 6ms | 1st |
Showing top 10 of 15 scripts
FJS BundlesAction42 scripts, 575 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-W8VX356 | 146 KB | 107 KB (73%) | ✓ | 3rd |
| https://pubhtml5.com/metrics/ | 151 KB | 83 KB (55%) | ✓ | 1st |
| https://pubhtml5.com/metrics/ | 0 KB | 83 KB (55%) | ✓ | 1st |
| https://pubhtml5.com/metrics/?id=G-L3MFCR9YTM&cx=c>m=4e64k0 | 178 KB | 74 KB (42%) | ✓ | 1st |
| https://pubhtml5.com/js/build/build.min.js?2d6126059b3dc9c9c0d22d95c4e00487 | 74 KB | 65 KB (88%) | ✓ | 1st |
| https://pubhtml5.com/metrics/?id=AW-17851241108&cx=c>m=4e64k0 | 0 KB | 60 KB (42%) | ✓ | 1st |
| https://pubhtml5.com/metrics/?id=AW-17851241108&cx=c>m=4e64k0 | 142 KB | 60 KB (42%) | ✓ | 1st |
| https://consent.cookiebot.com/Framework/IAB/consent-sdk-2.3.js | 66 KB | 43 KB (65%) | ✓ | 3rd |
| https://pubhtml5.com/js/jquery-1.10.2.min.js?v-1 | 32 KB | — | ✓ | 1st |
| https://pubhtml5.com/js/lib/jquery.qrcode.min.js | 0 KB | — | ✓ | 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 InventoryAction187 resources · 4.4 MB · 575 KB savings availableFIX
~574.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 187 resources | 4.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BThird-Party Impact46% third-party, 0 ms blockingREVIEW
CImage OptimizationAction100 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (752 KB)PASS
Web fonts
5
752 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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
- 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
- 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
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 ~549 KB and ~1098 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 Waterfall187 requests over 4560msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 1259ms | 0 KB | — | €7/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 1207ms | 27 KB | — | €6/mo | Costly |
consent.cookiebot.com consent.cookiebot.com | Other | 423ms | 117 KB | — | €2/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 85ms | 146 KB | 73% | €0/mo | Optional |
static.pubhtml5.com static.pubhtml5.com | Other | 77ms | 33 KB | — | €0/mo | Optional |
consent.cookiebot.com consent.cookiebot.com | Other | 76ms | 66 KB | 65% | €0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 1259ms and costs ~€7/month
- consent.cookiebot.com adds 1207ms and costs ~€6/month
- consent.cookiebot.com adds 423ms and costs ~€2/month
47% 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
Unattributable takes 1259ms 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 1207ms 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 423ms 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