https://lacia.life
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
98
GRADE
A+
FIX
1
REVIEW
1
PASS
17
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
93
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.
834 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.72 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.
834 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.73 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
2117 PASS 1 REVIEW 1 FIX
FPage Weight BudgetAction2.7 MB transferred, 63 requestsFIX
Page Weight Budget
Action2.7 MB transferred, 63 requests
2.7 MB transferred, 63 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::
63 HTTP requests
Info::
Estimated 0.57 g CO2 per page load
2.7 MB transferred
63 requests
0.57 g CO2 per page load
Images 2.5 MiB 91%
JavaScript 215.4 KiB 8%
CSS 17.1 KiB 1%
HTML 10.9 KiB 0%
Other 6.9 KiB 0%
Other 6.4 KiB 0%
Other 459 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
CPage Weight InventoryAction63 resources · 2.7 MB · 30 KB savings availableREVIEW
Page Weight Inventory
Action63 resources · 2.7 MB · 30 KB savings available
63 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
63 resources · 2.7 MiB · 1 third-party 1.7 MiB over 1MB target
Image 91% · 2.5 MiB
JavaScript 8% · 215.4 KiB
CSS 1% · 17.1 KiB
Document 0% · 10.9 KiB
Other 0% · 6.9 KiB
~29.9 KiB of savings available
Remove unused JavaScript: 29.9 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 63 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+JS Execution Cost494ms total JS executionPASS
JS Execution Cost
494ms total JS execution
494ms total JS execution
Info::
https://lacia.life/: 245ms CPU time
Info::
Unattributable: 110ms CPU time
Info::
https://lacia.life/assets/sidebars-CwO9xs-u.js: 79ms CPU time
Info::
https://lacia.life/assets/index-DoHyi94N.js: 61ms CPU time
Main Thread Breakdown
Other 66% Script Evaluation 16% Style & Layout 15%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://lacia.life/ | 245ms | 7ms | 1ms | 1st |
| Unattributable | 110ms | 9ms | 0ms | 1st |
| https://lacia.life/assets/sidebars-CwO9xs-u.js | 79ms | 1ms | 0ms | 1st |
| https://lacia.life/assets/index-DoHyi94N.js | 61ms | 56ms | 1ms | 1st |
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 Waterfall63 requests over 1374msINFO
Network Waterfall
63 requests over 1374ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization11 images, 823 KB total, 374 KB wastedINFO
Image Optimization
11 images, 823 KB total, 374 KB wasted
Image Optimization Audit
Total Images
11
Total Size
823 KB
Oversized
3
Wasted
374 KB
11 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.