Performance
· 23 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.
601 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.55 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
208 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.019
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.99 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.
3.20 s
Page Load Progression
FPage Weight BudgetAction10.5 MB transferred, 217 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 ImpactAction88% third-party, 0 ms blockingFIX
DJS Execution CostAction2707ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://hackernoon.com/ | 841ms | 31ms | 1ms | 1st |
| https://hackernoon.com/_next/static/chunks/framework-594babcea68f40f6.js | 729ms | 530ms | 8ms | 1st |
| Unattributable | 438ms | 73ms | 0ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-ECJJ2Q2SJQ | 184ms | 145ms | 21ms | 3rd |
| https://hackernoon.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 142ms | 131ms | 1ms | 1st |
| https://hackernoon.com/_next/static/chunks/pages/index-923438809c779d5b.js | 128ms | 55ms | 2ms | 1st |
| https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.105.0/core-en.js | 91ms | 68ms | 18ms | 3rd |
| https://hackernoon.com/_next/static/chunks/main-f4c6b80eccf8d9c3.js | 89ms | 68ms | 6ms | 1st |
| https://hackernoon.com/_next/static/chunks/7964.39547c4c28fe304b.js | 64ms | 61ms | 0ms | 1st |
FJS BundlesAction111 scripts, 1.4 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 99 KB | 74 KB (75%) | ✓ | 3rd |
| https://hackernoon.com/_next/static/chunks/7225-8c8308d5122595b5.js | 22 KB | 70 KB (89%) | ✓ | 1st |
| https://hackernoon.com/_next/static/chunks/7225-8c8308d5122595b5.js | 0 KB | 70 KB (89%) | ✓ | 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 | 0 KB | 57 KB (88%) | ✓ | 1st |
| https://hackernoon.com/_next/static/chunks/12537462-1082052b21c35477.js | 0 KB | 57 KB (88%) | ✓ | 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 InventoryAction217 resources · 10.5 MB · 1.4 MB savings availableFIX
~1.4 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 217 resources | 10.5 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 Optimization61 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 HintsNo optimization neededPASS
A+Compression AlgorithmMain response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
AServer Response Intelligence2 server-response signal(s) 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 Waterfall217 requests over 4440msINFO
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 | 184ms | 182 KB | 34% | €3/mo | Optional |
Iubenda cdn.iubenda.com | Consent | 91ms | 112 KB | 50% | €1/mo | Essential |
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
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