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https://koreaherald.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
5
REVIEW
3
PASS
7
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
47
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
64
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
85
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

9.99 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

10.85 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

342 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.

14.32 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.

21.84 s

Page Load Progression

905 ms
1.8 s
2.7 s
3.6 s
4.5 s
5.4 s
6.3 s
7.2 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
21.3 MB transferred, 120 requests
FIX
21.3 MB transferred, 120 requests
Critical::
Page weighs 23.7 MB (21.3 MB transferred)
Warning::
Images are 19.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 19.8 MB
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
Fonts are 282 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 282 KB
Warning::
120 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 4.5 g CO2 per page load
21.3 MB / 2.4 MB budget
21.3 MB transferred
120 requests
4.5 g CO2 per page load
Images 19.8 MiB 93%
JavaScript 1.1 MiB 5%
Fonts 282.2 KiB 1%
HTML 110.4 KiB 1%
CSS 68.2 KiB 0%
Other 4.1 KiB 0%
Other 2.2 KiB 0%
Other 1.5 KiB 0%
Other 646 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

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

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.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (21.3 MiB of 21.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
6931ms total JS execution
FIX
6931ms total JS execution
Warning::
https://static.heraldcorp.com/wbazic/kh/mobile/js/...: 3379ms CPU time
Warning::
https://m.koreaherald.com/: 1356ms CPU time
Warning::
Unattributable: 988ms CPU time
Warning::
https://static.heraldcorp.com/js/climateclock_v2.j...: 303ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-QCMC...: 237ms CPU time
Warning::
Third-party scripts: 6931ms (100% of total)

Main Thread Breakdown

Other 41% Script Evaluation 24% Style & Layout 16% Rendering 13% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://static.heraldcorp.com/wbazic/kh/mobile/js/swiper-bundle.min.js3379ms381ms13ms3rd
https://m.koreaherald.com/1356ms206ms21ms3rd
Unattributable988ms7ms0ms3rd
https://static.heraldcorp.com/js/climateclock_v2.js303ms268ms29ms3rd
https://www.googletagmanager.com/gtag/js?id=G-QCMCW365BY237ms191ms44ms3rd
https://www.googletagmanager.com/gtag/js?id=G-NSBNRNT4DP219ms185ms33ms3rd
https://www.googletagmanager.com/gtag/js?id=UA-127230343-2141ms103ms37ms3rd
https://embed-cdn.spotifycdn.com/_next/static/iframe_api.f8de525e2d635f3dc09d.js105ms87ms17ms3rd
https://code.jquery.com/jquery-3.3.1.min.js81ms62ms7ms3rd
https://www.googletagmanager.com/gtag/js?id=G-QCMCW365BY&cx=c&gtm=4e64e161ms24ms37ms3rd

Showing top 10 of 11 scripts

D
JS Bundles
Action
22 scripts, 474 KB unused
FIX
22 scripts, 474 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QCMC...: 109 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-NSBN...: 107 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-NSBN...: 63 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QCMC...: 63 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-127...: 63 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 474 KB
474 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-QCMCW365BY&cx=c&gtm=4e64e1158 KB109 KB (69%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-NSBNRNT4DP&cx=c&gtm=4e64e1154 KB107 KB (70%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-NSBNRNT4DP154 KB63 KB (41%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QCMCW365BY158 KB63 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-127230343-2117 KB63 KB (54%)✓3rd
https://static.heraldcorp.com/js/climateclock_v2.js148 KB45 KB (30%)✓3rd
https://static.heraldcorp.com/wbazic/kh/mobile/js/swiper-bundle.min.js44 KB23 KB (54%)✓3rd
https://open.spotify.com/embed/iframe-api/v11 KB—✓3rd
https://static.heraldcorp.com/js/lib/ajax.js2 KB—✓3rd
https://wcs.naver.net/wcslog.js11 KB—✓3rd

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

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

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

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

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

F
Page Weight Inventory
Action
120 resources · 21.3 MB · 474 KB savings available
FIX
120 resources · 21.3 MB · 474 KB savings available
Warning::
Page weight 20.3 MB over 1MB target
Got: 21.3 MB Expected: ≤ 1 MB
Info::
~474 KB of savings available
Warning::
119 third-party resources (100% of weight)
Info::
23 resources over 200KB
120 resources · 21.3 MiB · 119 third-party 20.3 MiB over 1MB target
Image 93% · 19.8 MiB
JavaScript 5% · 1.1 MiB
Font 1% · 282.2 KiB
Document 1% · 111.1 KiB
CSS 0% · 68.2 KiB
Other 0% · 6.2 KiB

~473.5 KiB of savings available

Remove unused JavaScript: 473.5 KiB
C
Image Optimization
Action
59 images, 0 KB saveable
REVIEW
59 images, 0 KB saveable
Warning::
https://wimg.heraldcorp.com/svc/banner/202501/fa74... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://wimg.heraldcorp.com/svc/banner/202509/5940... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://wimg.heraldcorp.com/svc/banner/202501/8645... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static.heraldcorp.com/wbazic/kh/mobile/ima... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://wimg.heraldcorp.com/svc/banner/202412/2c01... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
59 images 19.8 MB
0 oversized -0 KB
59 legacy format
5 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

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

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

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

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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
private
REVIEW
private
Info::
Cache-Control header is set
Got: private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
20 fonts (282 KB)
PASS
20 fonts (282 KB)
Info::
20 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

20

282 KB total

Render-blocking

0

of 20

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 10.0 s LCP 10.8 sdata:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA…font-woff;charset=utf-8... data:application/font-woff;charset=utf-8;base64, d09GRgABAAAAAAZgABAAAAAADAAAAAAAAAAAAAAAAAAAAAAAAA… — 1.6 KiB — 45 ms — font-display: swaphttps://fonts.gstatic.com/s/frankruhllibre/v23/j8_w6_fAw7jrcalD7oKYNX0QfAnPW7Dl4brkiY8.woff2j8_w6_fAw7jrcalD7oKYNX0... https://fonts.gstatic.com/s/frankruhllibre/v23/j8_w6_fAw7jrcalD7oKYNX0QfAnPW7Dl4brkiY8.woff2 — 43.3 KiB — 60 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.113.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.113.woff2 — 14.6 KiB — 43 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.118.woff29Bty3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.118.woff2 — 13.3 KiB — 41 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.117.woff29Bty3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.117.woff2 — 14.6 KiB — 49 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.112.woff29Bty3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.112.woff2 — 16.1 KiB — 55 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.119.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.119.woff2 — 9.4 KiB — 59 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.118.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.118.woff2 — 12.0 KiB — 92 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.117.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.117.woff2 — 13.1 KiB — 108 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.116.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.116.woff2 — 14.2 KiB — 99 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.115.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.115.woff2 — 13.8 KiB — 96 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.116.woff29Bty3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Bty3DZF0dXLMZlywRbVRNhxy2pXV1Axpfas5fA_eQvhAy_DdAvmOw1YkdrXVGtY.116.woff2 — 15.8 KiB — 65 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.114.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.114.woff2 — 14.3 KiB — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.110.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.110.woff2 — 15.4 KiB — 110 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.112.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.112.woff2 — 14.6 KiB — 71 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.111.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.111.woff2 — 15.2 KiB — 84 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.109.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.109.woff2 — 15.0 KiB — 108 ms — font-display: swaphttps://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.104.woff29Btx3DZF0dXLMZlywRbVRNh... https://fonts.gstatic.com/s/nanummyeongjo/v31/9Btx3DZF0dXLMZlywRbVRNhxy1LueHI8j7a277xGHHfvDTP5cQDfPh1ShL-7.104.woff2 — 10.1 KiB — 135 ms — font-display: swapdata:application/font-woff2;charset=utf-8;base64,d09GMgABAAAAAB9EABAAAAAASNAAAB7lAAEAAAAAAAAAAAAAAA…font-woff2;charset=utf-... data:application/font-woff2;charset=utf-8;base64,d09GMgABAAAAAB9EABAAAAAASNAAAB7lAAEAAAAAAAAAAAAAAA… — 7.8 KiB — 19 ms — font-display: swapdata:application/font-woff2;charset=utf-8;base64,d09GMgABAAAAAB9AABAAAAAASXQAAB7hAAEAAAAAAAAAAAAAAA…font-woff2;charset=utf-... data:application/font-woff2;charset=utf-8;base64,d09GMgABAAAAAB9AABAAAAAASXQAAB7hAAEAAAAAAAAAAAAAAA… — 7.8 KiB — 5 ms — font-display: swap
font-woff;charset=utf-8... woff swap
Size 2 KB
Load time 45 ms
Start 6.9 s
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
j8_w6_fAw7jrcalD7oKYNX0... woff2 swap
Size 43 KB
Load time 60 ms
Start 6.9 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 15 KB
Load time 43 ms
Start 7.0 s
Risk FOUT — text flashes from fallback to web font
9Bty3DZF0dXLMZlywRbVRNh... woff2 swap
Size 13 KB
Load time 41 ms
Start 7.0 s
Risk FOUT — text flashes from fallback to web font
9Bty3DZF0dXLMZlywRbVRNh... woff2 swap
Size 15 KB
Load time 49 ms
Start 7.0 s
Risk FOUT — text flashes from fallback to web font
9Bty3DZF0dXLMZlywRbVRNh... woff2 swap
Size 16 KB
Load time 55 ms
Start 7.0 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 9 KB
Load time 59 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 12 KB
Load time 92 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 13 KB
Load time 108 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 14 KB
Load time 99 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 14 KB
Load time 96 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Bty3DZF0dXLMZlywRbVRNh... woff2 swap
Size 16 KB
Load time 65 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 14 KB
Load time 77 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 15 KB
Load time 110 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 15 KB
Load time 71 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 15 KB
Load time 84 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 15 KB
Load time 108 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
9Btx3DZF0dXLMZlywRbVRNh... woff2 swap
Size 10 KB
Load time 135 ms
Start 7.1 s
Risk FOUT — text flashes from fallback to web font
font-woff2;charset=utf-... woff2 swap
Size 8 KB
Load time 19 ms
Start 7.5 s
Risk FOUT — text flashes from fallback to web font
font-woff2;charset=utf-... woff2 swap
Size 8 KB
Load time 5 ms
Start 8.3 s
Risk FOUT — text flashes from fallback to web font
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)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
120 requests over 14322ms
INFO
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h2https://static.heraldcorp.com/wbazic/kh/mobile/css/reset.css?v=202603301436static.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/reset.css?v=202603301436 — 200 — 3.5 KiB — 2.2 s — h2https://static.heraldcorp.com/wbazic/kh/mobile/css/common.css?v=202603301436static.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/common.css?v=202603301436 — 200 — 19.5 KiB — 2.2 s — h2https://static.heraldcorp.com/js/lib/utils.js?v=202603301436static.heraldcorp.com/js/lib/utils.... https://static.heraldcorp.com/js/lib/utils.js?v=202603301436 — 200 — 11.6 KiB — 2.5 s — h2https://static.heraldcorp.com/js/lib/utils.kh.hrd.js?v=202603301436static.heraldcorp.com/js/lib/utils.... https://static.heraldcorp.com/js/lib/utils.kh.hrd.js?v=202603301436 — 200 — 4.7 KiB — 2.7 s — h2https://static.heraldcorp.com/js/lib/ajax.jsstatic.heraldcorp.com/js/lib/ajax.j... https://static.heraldcorp.com/js/lib/ajax.js — 200 — 2.3 KiB — 2.5 s — h2https://static.heraldcorp.com/js/lib/sscad.jsstatic.heraldcorp.com/js/lib/sscad.... https://static.heraldcorp.com/js/lib/sscad.js — 200 — 2.4 KiB — 2.5 s — h2https://static.heraldcorp.com/js/lib/lazyimg.jsstatic.heraldcorp.com/js/lib/lazyim... https://static.heraldcorp.com/js/lib/lazyimg.js — 200 — 2.2 KiB — 2.2 s — h2https://static.heraldcorp.com/js/lib/more.jsstatic.heraldcorp.com/js/lib/more.j... https://static.heraldcorp.com/js/lib/more.js — 200 — 2.3 KiB — 2.5 s — h2https://developers.kakao.com/sdk/js/kakao.min.jsdevelopers.kakao.com/sdk/js/kakao.m... https://developers.kakao.com/sdk/js/kakao.min.js — 301 — 139 B — 1.4 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.80781896360a49fea0274ef35450549d_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.80781896360a49fea0274ef35450549d_R.jpg?type=w&w=400 — 200 — 20.7 KiB — 2.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.0de13e7cdfdc4bf19ab9482951c9cc34_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.0de13e7cdfdc4bf19ab9482951c9cc34_R.jpg?type=w&w=400 — 200 — 28.7 KiB — 3.1 s — h2https://t1.kakaocdn.net/kakao_js_sdk/v1/kakao.min.jst1.kakaocdn.net/kakao_js_sdk/v1/kak... https://t1.kakaocdn.net/kakao_js_sdk/v1/kakao.min.js — 200 — 34.5 KiB — 60 ms — h2https://fonts.googleapis.com/css2?family=Frank+Ruhl+Libre:wght@300..900&family=Nanum+Myeongjo:wght@400;700;800&display=swapfonts.googleapis.com/css2?family=Fr... https://fonts.googleapis.com/css2?family=Frank+Ruhl+Libre:wght@300..900&family=Nanum+Myeongjo:wght@400;700;800&display=swap — 200 — 38.4 KiB — 189 ms — h2https://static.heraldcorp.com/wbazic/kh/mobile/css/climate.cssstatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/climate.css — 200 — 1.5 KiB — 281 ms — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.d4e4e30f9554428a8871ae390b4a41da_R.png?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.d4e4e30f9554428a8871ae390b4a41da_R.png?type=w&w=400 — 200 — 127.7 KiB — 1.2 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.cbd8a6bbeace47f0a571f208132a8927_R.jpeg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.cbd8a6bbeace47f0a571f208132a8927_R.jpeg?type=w&w=400 — 200 — 48.9 KiB — 912 ms — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.e7309fb70c024e55882f8bab2ae41b20_P1.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.e7309fb70c024e55882f8bab2ae41b20_P1.jpg — 200 — 790.5 KiB — 3.9 s — h2https://wcs.naver.net/wcslog.jswcs.naver.net/wcslog.js https://wcs.naver.net/wcslog.js — 200 — 10.5 KiB — 58 ms — http/1.1https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ec8c55107e4f485793a0c15b39504dc1_P1.pngwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ec8c55107e4f485793a0c15b39504dc1_P1.png — 200 — 495.1 KiB — 3.0 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/rcv.YNA.20260414.PYH2026041406080005400_P1.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/rcv.YNA.20260414.PYH2026041406080005400_P1.jpg — 200 — 907.4 KiB — 4.7 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.77451bf6eb434edeb20ba6ec7d519715_P1.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.77451bf6eb434edeb20ba6ec7d519715_P1.jpg — 200 — 297.9 KiB — 2.4 s — h2https://static.heraldcorp.com/wbazic/kh/mobile/image/kh_event_bnn_1600x900_260330.jpgstatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/image/kh_event_bnn_1600x900_260330.jpg — 200 — 611.5 KiB — 1.1 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.4dfd435e1f5d4bdf84f0ec403a9f2fd0_R.pngwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.4dfd435e1f5d4bdf84f0ec403a9f2fd0_R.png — 200 — 475.1 KiB — 3.3 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.eedd7a79057e473e8d1b31d1c85d73a2_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.eedd7a79057e473e8d1b31d1c85d73a2_T1.jpg?type=h&h=240 — 200 — 17.4 KiB — 1.5 s — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 10.0 s LCP 10.8 shttps://koreaherald.com// https://koreaherald.com/ — 301 — 293 B — 822 ms — http/1.1https://www.koreaherald.com/www.koreaherald.com/ https://www.koreaherald.com/ — 302 — 267 B — 833 ms — http/1.1https://m.koreaherald.com/m.koreaherald.com/ https://m.koreaherald.com/ — 200 — 110.4 KiB — 2.7 s — http/1.1https://code.jquery.com/jquery-3.3.1.min.jscode.jquery.com/jquery-3.3.1.min.js https://code.jquery.com/jquery-3.3.1.min.js — 200 — 29.9 KiB — 36 ms — h2https://static.heraldcorp.com/wbazic/kh/mobile/css/swiper-bundle.min.cssstatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/swiper-bundle.min.css — 200 — 5.3 KiB — 1.9 s — h2https://static.heraldcorp.com/wbazic/kh/mobile/js/swiper-bundle.min.jsstatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/js/swiper-bundle.min.js — 200 — 43.6 KiB — 2.7 s — h2https://static.heraldcorp.com/wbazic/kh/mobile/css/reset.css?v=202603301436static.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/reset.css?v=202603301436 — 200 — 3.5 KiB — 2.2 s — h2https://static.heraldcorp.com/wbazic/kh/mobile/css/common.css?v=202603301436static.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/common.css?v=202603301436 — 200 — 19.5 KiB — 2.2 s — h2https://static.heraldcorp.com/js/lib/utils.js?v=202603301436static.heraldcorp.com/js/lib/utils.... https://static.heraldcorp.com/js/lib/utils.js?v=202603301436 — 200 — 11.6 KiB — 2.5 s — h2https://static.heraldcorp.com/js/lib/utils.kh.hrd.js?v=202603301436static.heraldcorp.com/js/lib/utils.... https://static.heraldcorp.com/js/lib/utils.kh.hrd.js?v=202603301436 — 200 — 4.7 KiB — 2.7 s — h2https://static.heraldcorp.com/js/lib/ajax.jsstatic.heraldcorp.com/js/lib/ajax.j... https://static.heraldcorp.com/js/lib/ajax.js — 200 — 2.3 KiB — 2.5 s — h2https://static.heraldcorp.com/js/lib/sscad.jsstatic.heraldcorp.com/js/lib/sscad.... https://static.heraldcorp.com/js/lib/sscad.js — 200 — 2.4 KiB — 2.5 s — h2https://static.heraldcorp.com/js/lib/lazyimg.jsstatic.heraldcorp.com/js/lib/lazyim... https://static.heraldcorp.com/js/lib/lazyimg.js — 200 — 2.2 KiB — 2.2 s — h2https://static.heraldcorp.com/js/lib/more.jsstatic.heraldcorp.com/js/lib/more.j... https://static.heraldcorp.com/js/lib/more.js — 200 — 2.3 KiB — 2.5 s — h2https://developers.kakao.com/sdk/js/kakao.min.jsdevelopers.kakao.com/sdk/js/kakao.m... https://developers.kakao.com/sdk/js/kakao.min.js — 301 — 139 B — 1.4 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.80781896360a49fea0274ef35450549d_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.80781896360a49fea0274ef35450549d_R.jpg?type=w&w=400 — 200 — 20.7 KiB — 2.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.0de13e7cdfdc4bf19ab9482951c9cc34_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.0de13e7cdfdc4bf19ab9482951c9cc34_R.jpg?type=w&w=400 — 200 — 28.7 KiB — 3.1 s — h2https://t1.kakaocdn.net/kakao_js_sdk/v1/kakao.min.jst1.kakaocdn.net/kakao_js_sdk/v1/kak... https://t1.kakaocdn.net/kakao_js_sdk/v1/kakao.min.js — 200 — 34.5 KiB — 60 ms — h2https://fonts.googleapis.com/css2?family=Frank+Ruhl+Libre:wght@300..900&family=Nanum+Myeongjo:wght@400;700;800&display=swapfonts.googleapis.com/css2?family=Fr... https://fonts.googleapis.com/css2?family=Frank+Ruhl+Libre:wght@300..900&family=Nanum+Myeongjo:wght@400;700;800&display=swap — 200 — 38.4 KiB — 189 ms — h2https://static.heraldcorp.com/wbazic/kh/mobile/css/climate.cssstatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/css/climate.css — 200 — 1.5 KiB — 281 ms — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.d4e4e30f9554428a8871ae390b4a41da_R.png?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.d4e4e30f9554428a8871ae390b4a41da_R.png?type=w&w=400 — 200 — 127.7 KiB — 1.2 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.cbd8a6bbeace47f0a571f208132a8927_R.jpeg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.cbd8a6bbeace47f0a571f208132a8927_R.jpeg?type=w&w=400 — 200 — 48.9 KiB — 912 ms — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.e7309fb70c024e55882f8bab2ae41b20_P1.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.e7309fb70c024e55882f8bab2ae41b20_P1.jpg — 200 — 790.5 KiB — 3.9 s — h2https://wcs.naver.net/wcslog.jswcs.naver.net/wcslog.js https://wcs.naver.net/wcslog.js — 200 — 10.5 KiB — 58 ms — http/1.1https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ec8c55107e4f485793a0c15b39504dc1_P1.pngwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ec8c55107e4f485793a0c15b39504dc1_P1.png — 200 — 495.1 KiB — 3.0 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/rcv.YNA.20260414.PYH2026041406080005400_P1.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/rcv.YNA.20260414.PYH2026041406080005400_P1.jpg — 200 — 907.4 KiB — 4.7 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.77451bf6eb434edeb20ba6ec7d519715_P1.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.77451bf6eb434edeb20ba6ec7d519715_P1.jpg — 200 — 297.9 KiB — 2.4 s — h2https://static.heraldcorp.com/wbazic/kh/mobile/image/kh_event_bnn_1600x900_260330.jpgstatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/image/kh_event_bnn_1600x900_260330.jpg — 200 — 611.5 KiB — 1.1 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.4dfd435e1f5d4bdf84f0ec403a9f2fd0_R.pngwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.4dfd435e1f5d4bdf84f0ec403a9f2fd0_R.png — 200 — 475.1 KiB — 3.3 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.eedd7a79057e473e8d1b31d1c85d73a2_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.eedd7a79057e473e8d1b31d1c85d73a2_T1.jpg?type=h&h=240 — 200 — 17.4 KiB — 1.5 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260415.1ec796c0d724444094fce8e9bc8dc652_T1.png?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260415.1ec796c0d724444094fce8e9bc8dc652_T1.png?type=h&h=240 — 200 — 71.4 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260415.e3c38970200d4d5c96179d9157f51343_T1.png?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260415.e3c38970200d4d5c96179d9157f51343_T1.png?type=h&h=240 — 200 — 93.6 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.9f625344d23a43c6837c8eaa862baf8b_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.9f625344d23a43c6837c8eaa862baf8b_T1.jpg?type=h&h=240 — 200 — 27.6 KiB — 1.5 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260413.05f15fcc2ed74c00b8e6e90965fce9f5_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260413.05f15fcc2ed74c00b8e6e90965fce9f5_T1.jpg?type=h&h=240 — 200 — 17.3 KiB — 1.5 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/13/news-p.v1.20260413.c8f0eac0c87b48278536edfe85f322d4_T1.png?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/13/news-p.v1.20260413.c8f0eac0c87b48278536edfe85f322d4_T1.png?type=h&h=240 — 200 — 108.3 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.80781896360a49fea0274ef35450549d_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.80781896360a49fea0274ef35450549d_T1.jpg?type=h&h=240 — 200 — 12.9 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260414.8c532a7bff224fe5b61cd20a36dfabf4_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260414.8c532a7bff224fe5b61cd20a36dfabf4_T1.jpg?type=h&h=240 — 200 — 17.3 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260409.2b8e28ef9edd4d8482027bdb15d1bc71_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260409.2b8e28ef9edd4d8482027bdb15d1bc71_T1.jpg?type=h&h=240 — 200 — 24.6 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.e5e779a1ebb94a6394064cc5101ddcbf_T1.jpg?type=h&h=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.e5e779a1ebb94a6394064cc5101ddcbf_T1.jpg?type=h&h=240 — 200 — 19.2 KiB — 1.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/rcv.YNA.20260414.PAF20260414157001009_R.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/rcv.YNA.20260414.PAF20260414157001009_R.jpg — 200 — 486.3 KiB — 3.9 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.a8bc6d937bf24b03b8c427fdc6c6445a_R.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.a8bc6d937bf24b03b8c427fdc6c6445a_R.jpg — 200 — 973.8 KiB — 5.3 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.a94609f028f448eea998073991990ea4_R.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.a94609f028f448eea998073991990ea4_R.jpg — 200 — 1.5 MiB — 5.6 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ec6b5e90d600402aa11989975634d63f_T1.gifwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ec6b5e90d600402aa11989975634d63f_T1.gif — 200 — 319.7 KiB — 3.3 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260414.a79f341968d3408cbdbf1d2eef62b4f8_T1.gifwimg.heraldcorp.com/news/cms/2026/0... 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h2https://wimg.heraldcorp.com/news/cms/2026/04/15/rcv.YNA.20260322.PYH2026032203500001300_R.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/rcv.YNA.20260322.PYH2026032203500001300_R.jpg — 200 — 886.8 KiB — 5.1 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.cd41881b69324a5886c1123c016e1b0f_R.pngwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.cd41881b69324a5886c1123c016e1b0f_R.png — 200 — 506.7 KiB — 4.4 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ba48d7e9060c4f23a978714de24b780e_R.jpgwimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.ba48d7e9060c4f23a978714de24b780e_R.jpg — 200 — 648.9 KiB — 4.8 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.cdee5da7c837489fb57432bd4025ad05_R.jpgwimg.heraldcorp.com/news/cms/2026/0... 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h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.e272dd5789104f59abe4db121b6f8dff_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.e272dd5789104f59abe4db121b6f8dff_R.jpg?type=w&w=400 — 200 — 28.0 KiB — 3.0 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.a84cc2a750324890bea8be25e8a3cfd7_R.jpg?type=w&w=240wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-p.v1.20260415.a84cc2a750324890bea8be25e8a3cfd7_R.jpg?type=w&w=240 — 200 — 8.8 KiB — 3.0 s — h2https://wimg.heraldcorp.com/svc/desking/1003/Kpop/202604/A10717586_238_20260415131210.png?type=w&w=240wimg.heraldcorp.com/svc/desking/100... https://wimg.heraldcorp.com/svc/desking/1003/Kpop/202604/A10717586_238_20260415131210.png?type=w&w=240 — 200 — 79.8 KiB — 3.0 s — 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200 — 30.5 KiB — 3.0 s — h2https://open.spotify.com/embed/iframe-api/v1open.spotify.com/embed/iframe-api/v... https://open.spotify.com/embed/iframe-api/v1 — 200 — 1.3 KiB — 165 ms — h2https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260414.67fda352b34148e59b42b0ad3ac99a42_R.png?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/15/news-a.v1.20260414.67fda352b34148e59b42b0ad3ac99a42_R.png?type=w&w=400 — 200 — 152.4 KiB — 3.7 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260409.2b8e28ef9edd4d8482027bdb15d1bc71_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... https://wimg.heraldcorp.com/news/cms/2026/04/14/news-p.v1.20260409.2b8e28ef9edd4d8482027bdb15d1bc71_R.jpg?type=w&w=400 — 200 — 37.8 KiB — 3.0 s — h2https://wimg.heraldcorp.com/news/cms/2026/04/13/news-a.v1.20260413.3fd054755bac4032948040cc310fd510_R.jpg?type=w&w=400wimg.heraldcorp.com/news/cms/2026/0... 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https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-NSBNRNT4DP&cid=483499033.1776295153&gtm=45je64e1v891018751za20g&rcb=18&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938465~115938468~117266401~117512543&z=1955515977 — 200 — 408 B — 162 ms — h2https://ssl.google-analytics.com/r/__utm.gif?utmwv=5.7.2&utms=1&utmn=2070321254&utmhn=m.koreaherald.com&utmcs=UTF-8&utmsr=412x823&utmvp=412x823&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmdt=The%20Korea%20Herald&utmhid=1315401610&utmr=-&utmp=%2F&utmht=1776295158282&utmac=UA-22444564-7&utmcc=__utma%3D73642446.483499033.1776295153.1776295158.1776295158.1%3B%2B__utmz%3D73642446.1776295158.1.1.utmcsr%3D(direct)%7Cutmccn%3D(direct)%7Cutmcmd%3D(none)%3B&utmjid=2121016094&utmredir=1&utmu=qAAAAAAAAAAAAAAAAAABAAAE~ssl.google-analytics.com/r/__utm.gi... 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https://stats.g.doubleclick.net/g/collect?v=2&tid=G-QCMCW365BY&cid=483499033.1776295153&gtm=45je64e1v9173677441za200&rcb=17&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938465~115938468~117266400~117512543~117884344 — 204 — 559 B — 120 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-NSBNRNT4DP&cid=483499033.1776295153&gtm=45je64e1v891018751za20g&rcb=18&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938465~115938468~117266401~117512543stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-NSBNRNT4DP&cid=483499033.1776295153&gtm=45je64e1v891018751za20g&rcb=18&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938465~115938468~117266401~117512543 — 204 — 57 B — 122 ms — h2https://uac.heraldcorp.com/uac/v1/col?m=log&sid=04&url=https%3A%2F%2Fm.koreaherald.com%2F&_id=cc533335b52fc80e&_idn=1&t=The%20korea%20Heralduac.heraldcorp.com/uac/v1/col?m=log... https://uac.heraldcorp.com/uac/v1/col?m=log&sid=04&url=https%3A%2F%2Fm.koreaherald.com%2F&_id=cc533335b52fc80e&_idn=1&t=The%20korea%20Herald — 204 — 176 B — 291 ms — http/1.1https://static.heraldcorp.com/wbazic/kh/mobile/image/favicon.icostatic.heraldcorp.com/wbazic/kh/mob... https://static.heraldcorp.com/wbazic/kh/mobile/image/favicon.ico — 200 — 1.5 KiB — 281 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 6931ms · 1101KB · S$120/mo
static.heraldcorp.com
Other
Costly
Execution 3379ms
Transfer 44 KB
Unused 54%
Monthly Cost S$58/mo
m.koreaherald.com
Other
Costly
Execution 1356ms
Transfer 110 KB
Monthly Cost S$23/mo
Unattributable
Other
Costly
Execution 988ms
Transfer 0 KB
Monthly Cost S$17/mo
static.heraldcorp.com
Other
Costly
Execution 303ms
Transfer 148 KB
Unused 30%
Monthly Cost S$5/mo
Google Tag Manager
Tag Manager
Costly
Execution 237ms
Transfer 158 KB
Unused 40%
Monthly Cost S$4/mo
Google Tag Manager
Tag Manager
Costly
Execution 219ms
Transfer 154 KB
Unused 41%
Monthly Cost S$4/mo
Google Tag Manager
Tag Manager
Optional
Execution 141ms
Transfer 117 KB
Unused 54%
Monthly Cost S$2/mo
embed-cdn.spotifycdn.com
Other
Optional
Execution 105ms
Transfer 30 KB
Monthly Cost S$2/mo
code.jquery.com
Other
Optional
Execution 81ms
Transfer 30 KB
Monthly Cost S$1/mo
Google Tag Manager
Tag Manager
Optional
Execution 61ms
Transfer 158 KB
Unused 69%
Monthly Cost S$1/mo
Google Tag Manager
Tag Manager
Optional
Execution 60ms
Transfer 154 KB
Unused 70%
Monthly Cost S$1/mo

These scripts may cost more than they're worth

  • static.heraldcorp.com adds 3379ms and costs ~S$58/month
  • m.koreaherald.com adds 1356ms and costs ~S$23/month
  • Unattributable adds 988ms and costs ~S$17/month
  • static.heraldcorp.com adds 303ms and costs ~S$5/month
  • Google Tag Manager adds 237ms and costs ~S$4/month
  • Google Tag Manager adds 219ms and costs ~S$4/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

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

static.heraldcorp.com takes 3379ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

54% of static.heraldcorp.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

m.koreaherald.com takes 1356ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 988ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

static.heraldcorp.com takes 303ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 237ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 219ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

54% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

69% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

70% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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