Performance
· 26 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.
2.18 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.78 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
775 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.182
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.18 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.
6.38 s
Page Load Progression
FJS Execution CostAction4446ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://bazicalculator.pro/ | 2653ms | 53ms | 58ms | 1st |
| https://bazicalculator.pro/_next/static/chunks/9448-2278cfb833bb224e.js | 725ms | 652ms | 25ms | 1st |
| Unattributable | 468ms | 15ms | 0ms | 1st |
| https://bazicalculator.pro/_next/static/chunks/webpack-cceb4ab57a5ecd29.js | 453ms | 428ms | 1ms | 1st |
| https://bazicalculator.pro/_next/static/chunks/fae1a7c7-071b2102016d171c.js | 147ms | 95ms | 30ms | 1st |
CMain HTML Cache-ControlActionMain HTML max-age=14400 (~240min) is aggressiveREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
APage Weight Budget742 KB transferred, 57 requestsPASS
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
A+Third-Party Impact1% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Image Optimization2 images, 0 KB saveablePASS
A+Font Loading5 fonts (267 KB)PASS
Web fonts
5
267 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~82 KB and ~164 ms
A+JS Bundles38 scripts, 21 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://bazicalculator.pro/_next/static/chunks/fae1a7c7-071b2102016d171c.js | 63 KB | 21 KB (34%) | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/8025-cc2538ef3bd71571.js | 7 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/5737-2783346c8208f291.js | 4 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/9448-2278cfb833bb224e.js | 51 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/main-app-9bfaadb7950adf35.js | 1 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/app/not-found-243feb25ce07def7.js | 3 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/3157-a178f9ae1dc913be.js | 3 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/2815-ce1179557f01d7ee.js | 9 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/5248-165c289c437c1df3.js | 4 KB | — | ✓ | 1st |
| https://bazicalculator.pro/_next/static/chunks/6163-1b3abba0502f95df.js | 12 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
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints5 hints, 0 missing preconnectsPASS
Current Resource Hints
5 resource hints configured
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+Document CompressionDocument response uses brotliPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability4 Server-Timing entries advertisedPASS
A+Server Response Intelligence2 server-response signal(s) detectedPASS
A+Page Weight Inventory57 resources · 742 KB · 21 KB savings availablePASS
~21.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 57 resources | 741.9 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources 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
A+HTTP Cachingmax-age=14400 (4 hours)PASS
public, max-age=14400, s-maxage=3600
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 14400 | Cache for 4 hours |
| s-maxage | 3600 | CDN caches for 1 hour |
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall57 requests over 2138msINFO
Image Optimization1 images, 37 KB total, 31 KB wastedINFO
Image Optimization Audit
Total Images
1
Total Size
37 KB
Oversized
1
Wasted
31 KB