Performance
· 15 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.
2.95 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.81 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
595 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.
5.60 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.
5.81 s
Page Load Progression
2.4 s
4.9 s
7.3 s
9.8 s
12.2 s
14.6 s
17.1 s
19.5 sFPage Weight BudgetAction6.0 MB transferred, 368 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
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 ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction6301ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://t1.daumcdn.net/top/daum/daum-pc/production/20260415_132745/index.js | 3868ms | 1647ms | 31ms | 3rd |
| https://t1.daumcdn.net/kas/static/ba.min.js | 1244ms | 287ms | 8ms | 3rd |
| Unattributable | 556ms | 37ms | 0ms | 3rd |
| https://www.daum.net/ | 360ms | 6ms | 38ms | 3rd |
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604170101/show_ads_impl_fy2021.js?bust=31097971 | 115ms | 67ms | 32ms | 3rd |
| https://t1.kakaocdn.net/play/kamp/sdk/2.0.27/external.min.js | 94ms | 43ms | 51ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945 | 65ms | 43ms | 20ms | 3rd |
FJS BundlesAction23 scripts, 847 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://t1.kakaocdn.net/play/kamp/sdk/2.0.27/external.min.js | 378 KB | 220 KB (58%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/managed/js/adsense/m202604170101/show_ads_impl_fy2021.js?bust=31097971 | 178 KB | 138 KB (78%) | ✓ | 3rd |
| https://t1.daumcdn.net/top/daum/daum-pc/production/20260415_132745/index.js | 238 KB | 120 KB (51%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945 | 188 KB | 109 KB (58%) | ✓ | 3rd |
| https://t1.daumcdn.net/daumtop_deco/scripts/lib/lottie-player-2.0.2.js | 85 KB | 73 KB (86%) | ✓ | 3rd |
| https://t1.daumcdn.net/shophow_cssjs/daumtop/js/planmall.merged.23f70050e9a2a301140c.js | 71 KB | 46 KB (65%) | ✓ | 3rd |
| https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-1682288257759598 | 54 KB | 32 KB (59%) | ✓ | 3rd |
| https://t1.kakaocdn.net/play/kamp/sdk/2.0.27/kamp.min.js | 61 KB | 32 KB (52%) | ✓ | 3rd |
| https://search1.daumcdn.net/search/statics/common/js/fe/amado-workspace/pc/3.0.1/main.js | 52 KB | 30 KB (58%) | ✓ | 3rd |
| https://ssl.pstatic.net/tveta/libs/glad/prod/3.9.0/gfp-display-sdk.js | 44 KB | 26 KB (60%) | ✓ | 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 InventoryAction368 resources · 6.0 MB · 847 KB savings availableFIX
~846.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 368 resources | 6.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization165 images, 0 KB saveableREVIEW
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 LoadingNo web fonts (system fonts)PASS
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall368 requests over 32171msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
t1.daumcdn.net t1.daumcdn.net | Other | 3868ms | 238 KB | 51% | ₩29920/mo | Costly |
t1.daumcdn.net t1.daumcdn.net | Other | 1244ms | 59 KB | 34% | ₩9622/mo | Costly |
Unattributable Unattributable | Other | 556ms | 0 KB | — | ₩4302/mo | Costly |
www.daum.net www.daum.net | Other | 360ms | 126 KB | — | ₩2782/mo | Costly |
pagead2.googlesyndication.com pagead2.googlesyndication.com | Other | 115ms | 178 KB | 78% | ₩886/mo | Costly |
t1.kakaocdn.net t1.kakaocdn.net | Other | 94ms | 378 KB | 58% | ₩727/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 65ms | 188 KB | 58% | ₩502/mo | Costly |
These scripts may cost more than they're worth
- t1.daumcdn.net adds 3868ms and costs ~₩29920/month
- t1.daumcdn.net adds 1244ms and costs ~₩9622/month
- Unattributable adds 556ms and costs ~₩4302/month
- www.daum.net adds 360ms and costs ~₩2782/month
- pagead2.googlesyndication.com adds 115ms and costs ~₩886/month
- t1.kakaocdn.net adds 94ms and costs ~₩727/month
- securepubads.g.doubleclick.net adds 65ms and costs ~₩502/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
t1.daumcdn.net takes 3868ms 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
51% of t1.daumcdn.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
t1.daumcdn.net takes 1244ms 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
Unattributable takes 556ms 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
www.daum.net takes 360ms 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
pagead2.googlesyndication.com takes 115ms 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
78% of pagead2.googlesyndication.com'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
t1.kakaocdn.net takes 94ms 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
58% of t1.kakaocdn.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
securepubads.g.doubleclick.net takes 65ms 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
58% of securepubads.g.doubleclick.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