Performance
· 27 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.
2.62 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
11.13 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.84 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.017
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
8.13 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.
17.83 s
Page Load Progression
FPage Weight BudgetAction10.3 MB transferred, 191 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
DThird-Party ImpactAction86% third-party, 0 ms blockingFIX
FJS Execution CostAction10494ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://hackernoon.com/ | 3221ms | 106ms | 6ms | 1st |
| https://hackernoon.com/_next/static/chunks/framework-594babcea68f40f6.js | 2552ms | 1831ms | 26ms | 1st |
| Unattributable | 1537ms | 158ms | 0ms | 1st |
| https://hackernoon.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 559ms | 409ms | 3ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-ECJJ2Q2SJQ | 541ms | 455ms | 80ms | 3rd |
| https://hackernoon.com/_next/static/chunks/pages/index-923438809c779d5b.js | 470ms | 217ms | 7ms | 1st |
| https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.105.0/core-en.js | 330ms | 245ms | 62ms | 3rd |
| https://hackernoon.com/_next/static/chunks/main-f4c6b80eccf8d9c3.js | 269ms | 224ms | 20ms | 1st |
| https://hackernoon.com/_next/static/chunks/14964064-bba5ae96e79a9029.js | 253ms | 217ms | 27ms | 1st |
| https://hackernoon.com/_next/static/chunks/110-9f322d69a8fa205f.js | 169ms | 166ms | 3ms | 1st |
Showing top 10 of 16 scripts
FJS BundlesAction101 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://hackernoon.com/_next/static/chunks/8397-9a45732e2174d20e.js | 0 KB | 75 KB (74%) | ✓ | 1st |
| https://hackernoon.com/_next/static/chunks/8397-9a45732e2174d20e.js | 32 KB | 75 KB (74%) | ✓ | 1st |
| https://accounts.google.com/gsi/client | 99 KB | 74 KB (75%) | ✓ | 3rd |
| https://hackernoon.com/_next/static/chunks/7225-8c8308d5122595b5.js | 22 KB | 72 KB (91%) | ✓ | 1st |
| https://hackernoon.com/_next/static/chunks/7225-8c8308d5122595b5.js | 0 KB | 72 KB (91%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-ECJJ2Q2SJQ | 182 KB | 62 KB (34%) | ✓ | 3rd |
| https://hackernoon.com/_next/static/chunks/4e2cab0e-85de90fb70625b9e.js | 28 KB | 59 KB (64%) | ✓ | 1st |
| https://hackernoon.com/_next/static/chunks/4e2cab0e-85de90fb70625b9e.js | 0 KB | 59 KB (64%) | ✓ | 1st |
| https://hackernoon.com/_next/static/chunks/12537462-1082052b21c35477.js | 65 KB | 57 KB (88%) | ✓ | 1st |
| https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.105.0/core-en.js | 112 KB | 56 KB (50%) | ✓ | 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
FPage Weight InventoryAction191 resources · 10.3 MB · 1.3 MB savings availableFIX
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 191 resources | 10.3 MiB | ||||||
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BMain HTML Cache-ControlCache-Control present but without max-ageREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
BHTTP Cachings-maxage=3583, stale-while-revalidate=2592000REVIEW
s-maxage=3583, stale-while-revalidate=2592000
| Directive | Value | Meaning |
|---|---|---|
| s-maxage | 3583 | CDN caches for 59 minutes |
| stale-while-revalidate | 2592000 | Serve stale for 4 weeks while fetching fresh |
A+Text CompressionAll text resources are compressedPASS
AImage Optimization43 images, 0 KB saveablePASS
A+Font Loading7 fonts (239 KB)PASS
Web fonts
7
239 KB total
Render-blocking
0
of 7
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 Hints30 hints, 0 missing preconnectsPASS
Current Resource Hints
30 resource hints configured
A+Compression AlgorithmMain response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AJavaScript Blocking1 JS blocking issue(s) detectedPASS
A+CSS Performance DepthNo CSS performance depth issues 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 Waterfall191 requests over 5939msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 541ms | 182 KB | 34% | €9/mo | Costly |
Iubenda cdn.iubenda.com | Consent | 330ms | 112 KB | 50% | €5/mo | Essential |
accounts.google.com accounts.google.com | Other | 97ms | 99 KB | 75% | €2/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 541ms and costs ~€9/month
Google Tag Manager takes 541ms 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
50% of Iubenda'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
75% 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
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-08-08 — 2026-09-04)
LCP (p75)
3077 ms
65% good
INP (p75)
110 ms
89% good
CLS (p75)
0.020
88% good
FCP (p75)
1673 ms
TTFB (p75)
1056 ms
Image Optimization92 images, 190 KB total, 150 KB wastedINFO
Image Optimization Audit
Total Images
92
Total Size
190 KB
Oversized
6
Wasted
150 KB