https://lacia.life
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
97
GRADE
A+
FIX
1
REVIEW
2
PASS
16
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
90
95
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
987 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.93 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.03 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.
1.94 s
Page Load Progression
375 ms
750 ms
1.1 s
1.5 s 1.9 s
2.2 s
2.6 s 3.0 sChecks
2116 PASS 2 REVIEW 1 FIX
FPage Weight BudgetAction2.7 MB transferred, 65 requestsFIX
Page Weight Budget
Action2.7 MB transferred, 65 requests
2.7 MB transferred, 65 requests
Warning::
Page weighs 3.2 MB (2.7 MB transferred)
Warning::
Images are 2.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.5 MB
Info::
65 HTTP requests
Info::
Estimated 0.58 g CO2 per page load
2.7 MB transferred
65 requests
0.58 g CO2 per page load
Images 2.5 MiB 91%
JavaScript 218.1 KiB 8%
CSS 17.1 KiB 1%
HTML 10.9 KiB 0%
Other 7.0 KiB 0%
Other 6.6 KiB 0%
Other 906 B 0%
Other 450 B 0%
0 2.4 MB 4.9 MB
Over budget
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Why this matters
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
BJS Execution Cost604ms total JS executionREVIEW
JS Execution Cost
604ms total JS execution
604ms total JS execution
Warning::
https://lacia.life/: 309ms CPU time
Info::
Unattributable: 169ms CPU time
Info::
https://lacia.life/assets/index-DoHyi94N.js: 126ms CPU time
Main Thread Breakdown
Other 53% Script Evaluation 23% Style & Layout 19%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://lacia.life/ | 309ms | 10ms | 4ms | 1st |
| Unattributable | 169ms | 17ms | 0ms | 1st |
| https://lacia.life/assets/index-DoHyi94N.js | 126ms | 117ms | 1ms | 1st |
CPage Weight InventoryAction65 resources · 2.7 MB · 30 KB savings availableREVIEW
Page Weight Inventory
Action65 resources · 2.7 MB · 30 KB savings available
65 resources · 2.7 MB · 30 KB savings available
Warning::
Page weight 2.7 MB exceeds 1 MB target by 1.7 MB
Got: 2.7 MB Expected: ≤ 1 MB
Info::
1 third-party resources (0% of weight)
Info::
6 resources over 200KB
65 resources · 2.7 MiB · 1 third-party 1.7 MiB over 1MB target
Image 91% · 2.5 MiB
JavaScript 8% · 218.1 KiB
CSS 1% · 17.1 KiB
Document 0% · 10.9 KiB
Other 0% · 7.9 KiB
~29.9 KiB of savings available
Remove unused JavaScript: 29.9 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 65 resources | 2.7 MiB | ||||||
A+Third-Party Impact0% third-party, 0 ms blockingPASS
Third-Party Impact
0% third-party, 0 ms blocking
0% third-party, 0 ms blocking
Info::
Third-party code accounts for 0% of page weight (10.1 KiB of 2.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image Optimization11 images, 0 KB saveablePASS
Image Optimization
11 images, 0 KB saveable
11 images, 0 KB saveable
Warning::
https://lacia.life/assets/misaki.webp is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
11 images 2.5 MB
0 oversized -0 KB
0 legacy format
1 missing dimensions CLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+Font LoadingNo web fonts (system fonts)PASS
Font Loading
No web fonts (system fonts)
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+JS Bundles44 scripts, 30 KB unusedPASS
JS Bundles
44 scripts, 30 KB unused
44 scripts, 30 KB unused
Warning::
https://lacia.life/assets/index-DoHyi94N.js: 30 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 30 KB
30 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://lacia.life/assets/index-DoHyi94N.js | 77 KB | 30 KB (39%) | ✓ | 1st |
| https://lacia.life/assets/react-SIfiwpqq.js | 4 KB | — | ✓ | 1st |
| https://lacia.life/assets/react-dom-x9LNwWQc.js | 2 KB | — | ✓ | 1st |
| https://lacia.life/assets/createServerFn-BeC4yHFw.js | 12 KB | — | ✓ | 1st |
| https://lacia.life/assets/link-5skObtIq.js | 8 KB | — | ✓ | 1st |
| https://lacia.life/assets/useMatch-BI2N-WL4.js | 1 KB | — | ✓ | 1st |
| https://lacia.life/assets/lazyRouteComponent-T-iC1a3V.js | 2 KB | — | ✓ | 1st |
| https://lacia.life/assets/jsx-runtime-0vZSBttN.js | 1 KB | — | ✓ | 1st |
| https://lacia.life/assets/Match-BEA91Y5m.js | 2 KB | — | ✓ | 1st |
| https://lacia.life/assets/sidebars-CwO9xs-u.js | 24 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
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
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Compression AlgorithmMain response uses brotliPASS
Compression Algorithm
Main response uses brotli
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML max-age=30 (≤ 5min) is appropriatePASS
Main HTML Cache-Control
Main HTML max-age=30 (≤ 5min) is appropriate
Main HTML max-age=30 (≤ 5min) is appropriate
Info::
Main HTML max-age=30 (≤ 5min) is appropriate
Got: private, max-age=30, must-revalidate
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
Server-Timing Observability
3 Server-Timing entries advertised
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
AHTTP Cachingmax-age=30 (30 seconds)PASS
HTTP Caching
max-age=30 (30 seconds)
max-age=30 (30 seconds)
Info::
Cache-Control header is set
Got: private, max-age=30, must-revalidate
Info::
Effective TTL: 30 seconds (max-age=30)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
private, max-age=30, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| max-age | 30 | Cache for 30 seconds |
| must-revalidate | — | Must recheck with server after expiry |
Effective TTL: 30 seconds
Network Waterfall65 requests over 2092msINFO
Network Waterfall
65 requests over 2092ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization5 images, 823 KB total, 374 KB wastedINFO
Image Optimization
5 images, 823 KB total, 374 KB wasted
Image Optimization Audit
Total Images
5
Total Size
823 KB
Oversized
3
Wasted
374 KB
5 missing dimensions 1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.