Performance
· 17 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.
11.94 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
22.40 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
910 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.014
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
11.94 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.
26.21 s
Page Load Progression
FPage Weight BudgetAction5.0 MB transferred, 93 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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6994ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://m.naver.com/ | 3136ms | 16ms | 20ms | 3rd |
| https://mm.pstatic.net/js/build/main.86ff2c41.js | 1616ms | 1267ms | 141ms | 3rd |
| https://mm.pstatic.net/js/build/vendors.94bf8cea.js | 739ms | 216ms | 451ms | 3rd |
| Unattributable | 592ms | 40ms | 0ms | 3rd |
| https://ntm.pstatic.net/scripts/ntm_17c5bf488690.js | 198ms | 160ms | 37ms | 3rd |
| https://mm.pstatic.net/css/ncache/build/w_new.ddd9f783.css | 172ms | 0ms | 0ms | 3rd |
| https://ntm.pstatic.net/scripts/ntm_eee540032831.js | 135ms | 107ms | 28ms | 3rd |
| https://ssl.pstatic.net/tveta/libs/glad/prod/gfp-core.js | 108ms | 102ms | 5ms | 3rd |
| https://mm.pstatic.net/js/build/index_head.78ef0f00.js | 88ms | 72ms | 11ms | 3rd |
| https://ntm.pstatic.net/ex/nlog.js | 80ms | 62ms | 18ms | 3rd |
Showing top 10 of 12 scripts
FJS BundlesAction20 scripts, 1.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://mm.pstatic.net/js/build/vendors.94bf8cea.js | 1098 KB | 774 KB (71%) | ✓ | 3rd |
| https://mm.pstatic.net/js/build/main.86ff2c41.js | 259 KB | 216 KB (84%) | ✓ | 3rd |
| https://ntm.pstatic.net/scripts/ntm_eee540032831.js | 67 KB | 28 KB (42%) | ✓ | 3rd |
| https://ntm.pstatic.net/scripts/ntm_17c5bf488690.js | 82 KB | 28 KB (34%) | ✓ | 3rd |
| https://myspace.pstatic.net/nudge-sdk/2f3c345144a83cca6f1cab4b157b216468bcbe03/bundle.js | 30 KB | 24 KB (79%) | ✓ | 3rd |
| https://ntm.pstatic.net/ex/nlog.js | 47 KB | 20 KB (42%) | ✓ | 3rd |
| https://ssl.pstatic.net/tveta/libs/glad/prod/3.9.0/gfp-display-nda.js | 11 KB | — | ✓ | 3rd |
| https://ssl.pstatic.net/melona/libs/assets/js/mo/ssp/min/mo.ssp.veta.core.min.js | 6 KB | — | ✓ | 3rd |
| https://ssl.pstatic.net/tveta/libs/glad/prod/3.9.0/gfp-display-sdk.js | 44 KB | — | ✓ | 3rd |
| https://ssl.pstatic.net/melona/libs/gfp-nac-module/synchronizer.js | 18 KB | — | ✓ | 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 InventoryAction93 resources · 5.0 MB · 1.1 MB savings availableFIX
~1.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 93 resources | 5.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction42 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (756 KB)PASS
Web fonts
2
756 KB total
Render-blocking
0
of 2
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
- 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 ~378 KB and ~756 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall93 requests over 4663msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
m.naver.com m.naver.com | Other | 3136ms | 35 KB | — | ₩24262/mo | Costly |
mm.pstatic.net mm.pstatic.net | Other | 1616ms | 259 KB | 84% | ₩12504/mo | Costly |
mm.pstatic.net mm.pstatic.net | Other | 739ms | 1098 KB | 71% | ₩5713/mo | Costly |
Unattributable Unattributable | Other | 592ms | 0 KB | — | ₩4582/mo | Costly |
ntm.pstatic.net ntm.pstatic.net | Other | 198ms | 82 KB | 34% | ₩1530/mo | Costly |
mm.pstatic.net mm.pstatic.net | Other | 172ms | 209 KB | — | ₩1331/mo | Costly |
ntm.pstatic.net ntm.pstatic.net | Other | 135ms | 67 KB | 42% | ₩1044/mo | Costly |
ssl.pstatic.net ssl.pstatic.net | Other | 108ms | 16 KB | — | ₩839/mo | Costly |
mm.pstatic.net mm.pstatic.net | Other | 88ms | 34 KB | — | ₩680/mo | Costly |
ntm.pstatic.net ntm.pstatic.net | Other | 80ms | 47 KB | 42% | ₩619/mo | Costly |
ssl.pstatic.net ssl.pstatic.net | Other | 68ms | 18 KB | — | ₩524/mo | Costly |
ssl.pstatic.net ssl.pstatic.net | Other | 62ms | 44 KB | — | ₩479/mo | Costly |
These scripts may cost more than they're worth
- m.naver.com adds 3136ms and costs ~₩24262/month
- mm.pstatic.net adds 1616ms and costs ~₩12504/month
- mm.pstatic.net adds 739ms and costs ~₩5713/month
- Unattributable adds 592ms and costs ~₩4582/month
- ntm.pstatic.net adds 198ms and costs ~₩1530/month
- mm.pstatic.net adds 172ms and costs ~₩1331/month
- ntm.pstatic.net adds 135ms and costs ~₩1044/month
- ssl.pstatic.net adds 108ms and costs ~₩839/month
- mm.pstatic.net adds 88ms and costs ~₩680/month
- ntm.pstatic.net adds 80ms and costs ~₩619/month
- ssl.pstatic.net adds 68ms and costs ~₩524/month
- ssl.pstatic.net adds 62ms and costs ~₩479/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.
Learn more ▾ ▴
Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.
Source: web.dev
m.naver.com takes 3136ms 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
mm.pstatic.net takes 1616ms 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
84% of mm.pstatic.net'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
mm.pstatic.net takes 739ms 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
71% of mm.pstatic.net'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
Unattributable takes 592ms 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
ntm.pstatic.net takes 198ms 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
mm.pstatic.net takes 172ms 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
ntm.pstatic.net takes 135ms 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
ssl.pstatic.net takes 108ms 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
mm.pstatic.net takes 88ms 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
ntm.pstatic.net takes 80ms 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
ssl.pstatic.net takes 68ms 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
ssl.pstatic.net takes 62ms 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