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https://ocn.ne.jp

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
6
REVIEW
2
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.
89
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.
92
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.

3.13 s

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

7.63 s

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

937 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.009

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.43 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.

11.31 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 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.4 MB transferred, 67 requests
FIX
3.4 MB transferred, 67 requests
Warning::
Page weighs 5.1 MB (3.4 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
Warning::
JavaScript is 798 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 798 KB
Info::
67 HTTP requests
Info::
Estimated 0.72 g CO2 per page load
3.4 MB / 2.4 MB budget
3.4 MB transferred
67 requests
0.72 g CO2 per page load
Images 2.5 MiB 74%
JavaScript 798.4 KiB 23%
CSS 74.5 KiB 2%
HTML 53.6 KiB 2%
Other 1.8 KiB 0%
Other 548 B 0%
Other 548 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

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 (3.4 MiB of 3.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
3448ms total JS execution
FIX
3448ms total JS execution
Warning::
https://www.ocn.ne.jp/: 1185ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KK5...: 580ms CPU time
Warning::
Unattributable: 451ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2750...: 326ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WQ8...: 261ms CPU time
Warning::
Third-party scripts: 3448ms (100% of total)

Main Thread Breakdown

Script Evaluation 42% Style & Layout 28% Other 15% Script Parsing & Compilation 11%
ScriptTotalScriptingParse/CompileParty
https://www.ocn.ne.jp/1185ms55ms5ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KK5LPR580ms396ms174ms3rd
Unattributable451ms7ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-2750JE9XQG&cx=c&gtm=4e64h1326ms270ms53ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WQ8B89G&gtm=4e64h1261ms222ms37ms3rd
https://www.ocn.ne.jp/ocn_assets/sp/js/jquery-1.10.0.min.js?id=00ff34b67a328f219fa3ae2423d4f252232ms176ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-2VYT9C383M&cx=c&gtm=4e64h1229ms177ms49ms3rd
https://www.googletagmanager.com/gtag/js?id=G-5XDKHMB5SV&cx=c&gtm=4e64h1184ms146ms37ms3rd
D
JS Bundles
Action
16 scripts, 337 KB unused
FIX
16 scripts, 337 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2VYT...: 75 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-5XDK...: 73 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2750...: 65 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WQ8...: 64 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KK5...: 60 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 337 KB
337 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-2VYT9C383M&cx=c&gtm=4e64h1151 KB75 KB (50%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-5XDKHMB5SV&cx=c&gtm=4e64h1144 KB73 KB (51%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-2750JE9XQG&cx=c&gtm=4e64h1151 KB65 KB (43%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WQ8B89G&gtm=4e64h1133 KB64 KB (48%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KK5LPR134 KB60 KB (45%)✓3rd
https://www.ocn.ne.jp/ocn_assets/sp/js/ocn-infinite-scroll.js?id=dfa357c4f03ec8cb319d51c592f961df6 KB—✗3rd
https://www.ocn.ne.jp/ocn_assets/sp/js/ocntop.js?id=01f7ee8903672af09803e72f2497663813 KB—✓3rd
https://www.ocn.ne.jp/ocn_assets/sp/js/jquery.lazyload.min.js?id=5c01d7aff077b4ed0804b71c2e3ab4a11 KB—✓3rd
https://www.ocn.ne.jp/ocn_assets/sp/js/jquery-1.10.0.min.js?id=00ff34b67a328f219fa3ae2423d4f25232 KB—✓3rd
https://dev.visualwebsiteoptimizer.com/j.php?a=377405&u=https%3A%2F%2Fwww.ocn.ne.jp%2F&r=0.245095285152531322 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

D
Page Weight Inventory
Action
67 resources · 3.4 MB · 337 KB savings available
FIX
67 resources · 3.4 MB · 337 KB savings available
Warning::
Page weight 2.4 MB over 1MB target
Got: 3.4 MB Expected: ≤ 1 MB
Info::
~337 KB of savings available
Warning::
66 third-party resources (100% of weight)
Info::
4 resources over 200KB
67 resources · 3.4 MiB · 66 third-party 2.4 MiB over 1MB target
Image 74% · 2.5 MiB
JavaScript 23% · 798.4 KiB
CSS 2% · 74.5 KiB
Document 2% · 53.6 KiB
Other 0% · 1.1 KiB

~337.2 KiB of savings available

Remove unused JavaScript: 337.2 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
44 images, 0 KB saveable
REVIEW
44 images, 0 KB saveable
Warning::
https://www.ocn.ne.jp/top_tools/center/online_shop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ocn.ne.jp/top_tools/center/online_shop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ocn.ne.jp/ocn_assets/sp/img/_smp02/ocn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ocn.ne.jp/ocn_assets/sp/img/241101_doc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.ocn.ne.jp/top_tools/center/online_shop... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
44 images 2.5 MB
0 oversized -0 KB
30 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

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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
67 requests over 2168ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 3.1 s LCP 7.6 shttps://ocn.ne.jp// https://ocn.ne.jp/ — 301 — 84 B — 451 ms — h2https://www.ocn.ne.jp/www.ocn.ne.jp/ https://www.ocn.ne.jp/ — 200 — 53.6 KiB — 815 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/css/swiper.min.css?id=2603e9c21c62042a0e965d6430da7f19www.ocn.ne.jp/ocn_assets/sp/css/swi... https://www.ocn.ne.jp/ocn_assets/sp/css/swiper.min.css?id=2603e9c21c62042a0e965d6430da7f19 — 200 — 3.1 KiB — 24 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/css/ocn_sp_block3.css?id=ee2b18d4f163067eb86d82382f2901fawww.ocn.ne.jp/ocn_assets/sp/css/ocn... https://www.ocn.ne.jp/ocn_assets/sp/css/ocn_sp_block3.css?id=ee2b18d4f163067eb86d82382f2901fa — 200 — 71.5 KiB — 29 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/js/jquery-1.10.0.min.js?id=00ff34b67a328f219fa3ae2423d4f252www.ocn.ne.jp/ocn_assets/sp/js/jque... https://www.ocn.ne.jp/ocn_assets/sp/js/jquery-1.10.0.min.js?id=00ff34b67a328f219fa3ae2423d4f252 — 200 — 31.8 KiB — 27 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/js/swiper.min.js?id=cabdd76e521b31cec9589102858f42e3www.ocn.ne.jp/ocn_assets/sp/js/swip... https://www.ocn.ne.jp/ocn_assets/sp/js/swiper.min.js?id=cabdd76e521b31cec9589102858f42e3 — 200 — 28.1 KiB — 27 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/js/sp_clicklog.js?id=3845a76f025ec80718a17760b3169deawww.ocn.ne.jp/ocn_assets/sp/js/sp_c... https://www.ocn.ne.jp/ocn_assets/sp/js/sp_clicklog.js?id=3845a76f025ec80718a17760b3169dea — 200 — 1.0 KiB — 24 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=377405&u=https%3A%2F%2Fwww.ocn.ne.jp%2F&r=0.7910650499246024dev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=377405&u=https%3A%2F%2Fwww.ocn.ne.jp%2F&r=0.7910650499246024 — 200 — 2.5 KiB — 47 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/img/_smp02/ocn_logo.pngwww.ocn.ne.jp/ocn_assets/sp/img/_sm... https://www.ocn.ne.jp/ocn_assets/sp/img/_smp02/ocn_logo.png — 200 — 2.7 KiB — 354 ms — h2https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/700x308_tokuten_202512.pngwww.ocn.ne.jp/top_tools/center/uppe... https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/700x308_tokuten_202512.png — 200 — 65.8 KiB — 27 ms — h2https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/700x308_ahamo_202511.pngwww.ocn.ne.jp/top_tools/center/uppe... https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/700x308_ahamo_202511.png — 200 — 400.6 KiB — 27 ms — h2https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/700x308px_hikariset_202511.pngwww.ocn.ne.jp/top_tools/center/uppe... https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/700x308px_hikariset_202511.png — 200 — 80.6 KiB — 15 ms — h2https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/260401_2_ahamo_700x308.jpgwww.ocn.ne.jp/top_tools/center/uppe... https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/260401_2_ahamo_700x308.jpg — 200 — 315.7 KiB — 36 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-KK5LPRwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-KK5LPR — 200 — 134.3 KiB — 130 ms — h2https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/260401_2_mini_700x308.jpgwww.ocn.ne.jp/top_tools/center/uppe... https://www.ocn.ne.jp/top_tools/center/upper_info_slide/images/260401_2_mini_700x308.jpg — 200 — 367.2 KiB — 51 ms — h2https://www.ocn.ne.jp/ocn_assets/pc/img/icon-sv-mypage.pngwww.ocn.ne.jp/ocn_assets/pc/img/ico... https://www.ocn.ne.jp/ocn_assets/pc/img/icon-sv-mypage.png — 200 — 729 B — 27 ms — h2https://www.ocn.ne.jp/ocn_assets/pc/img/icon-sv-support.pngwww.ocn.ne.jp/ocn_assets/pc/img/ico... https://www.ocn.ne.jp/ocn_assets/pc/img/icon-sv-support.png — 200 — 709 B — 35 ms — h2https://www.ocn.ne.jp/ocn_assets/pc/img/icon-sv-info.pngwww.ocn.ne.jp/ocn_assets/pc/img/ico... https://www.ocn.ne.jp/ocn_assets/pc/img/icon-sv-info.png — 200 — 790 B — 35 ms — h2https://dev.visualwebsiteoptimizer.com/j.php?a=377405&u=https%3A%2F%2Fwww.ocn.ne.jp%2F&r=0.24509528515253132dev.visualwebsiteoptimizer.com/j.ph... https://dev.visualwebsiteoptimizer.com/j.php?a=377405&u=https%3A%2F%2Fwww.ocn.ne.jp%2F&r=0.24509528515253132 — 200 — 2.3 KiB — 20 ms — h2https://dev.visualwebsiteoptimizer.com/v.gif?cd=0&a=377405&d=ocn.ne.jp&u=D1E38096234119B1BC823C85FB779F4FD&h=36c8558775a87fb20582e812d7474888&t=falsedev.visualwebsiteoptimizer.com/v.gi... https://dev.visualwebsiteoptimizer.com/v.gif?cd=0&a=377405&d=ocn.ne.jp&u=D1E38096234119B1BC823C85FB779F4FD&h=36c8558775a87fb20582e812d7474888&t=false — 200 — 145 B — 84 ms — h2data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACQAAAAkCAMAAADW3miqAAACH1BMVEUVc+P////MADP//v7+/v7GA…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACQAAAAkCAMAAADW3miqAAACH1BMVEUVc+P////MADP//v7+/v7GA… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC4AAAAiCAMAAAAXpRt+AAABuVBMVEWVo7ePnbP///+PnrN8i6N8j…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC4AAAAiCAMAAAAXpRt+AAABuVBMVEWVo7ePnbP///+PnrN8i6N8j… — 200 — 0 B — 1 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC4AAAAmCAMAAACMNFloAAABDlBMVEUAAAD////2lr72lr72lr72l…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC4AAAAmCAMAAACMNFloAAABDlBMVEUAAAD////2lr72lr72lr72l… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAqCAMAAADLeogyAAACslBMVEUAAAAAAABoaWloaWkAAABjZ…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADQAAAAqCAMAAADLeogyAAACslBMVEUAAAAAAABoaWloaWkAAABjZ… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACIAAAAmCAMAAACWCLnmAAACalBMVEUAAAD/AAAAAACAAAD/AAD/A…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACIAAAAmCAMAAACWCLnmAAACalBMVEUAAAD/AAAAAACAAAD/AAD/A… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAZCAMAAADzN3VRAAAATlBMVEUAAAAAIJ8AMJ8AKKUAKqUAK…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAZCAMAAADzN3VRAAAATlBMVEUAAAAAIJ8AMJ8AKKUAKqUAK… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAAeCAYAAAAhDE4sAAABTElEQVR42mP8//8/A5mgFYh5gbgIi…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAAeCAYAAAAhDE4sAAABTElEQVR42mP8//8/A5mgFYh5gbgIi… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAAeCAYAAAAhDE4sAAABOElEQVR42p2UoUuDURTFNxwiBsVgW…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABIAAAAeCAYAAAAhDE4sAAABOElEQVR42p2UoUuDURTFNxwiBsVgW… — 200 — 0 B — 0 ms — 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0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 3.1 s LCP 7.6 shttps://ocn.ne.jp// https://ocn.ne.jp/ — 301 — 84 B — 451 ms — h2https://www.ocn.ne.jp/www.ocn.ne.jp/ https://www.ocn.ne.jp/ — 200 — 53.6 KiB — 815 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/css/swiper.min.css?id=2603e9c21c62042a0e965d6430da7f19www.ocn.ne.jp/ocn_assets/sp/css/swi... https://www.ocn.ne.jp/ocn_assets/sp/css/swiper.min.css?id=2603e9c21c62042a0e965d6430da7f19 — 200 — 3.1 KiB — 24 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/css/ocn_sp_block3.css?id=ee2b18d4f163067eb86d82382f2901fawww.ocn.ne.jp/ocn_assets/sp/css/ocn... https://www.ocn.ne.jp/ocn_assets/sp/css/ocn_sp_block3.css?id=ee2b18d4f163067eb86d82382f2901fa — 200 — 71.5 KiB — 29 ms — h2https://www.ocn.ne.jp/ocn_assets/sp/js/jquery-1.10.0.min.js?id=00ff34b67a328f219fa3ae2423d4f252www.ocn.ne.jp/ocn_assets/sp/js/jque... https://www.ocn.ne.jp/ocn_assets/sp/js/jquery-1.10.0.min.js?id=00ff34b67a328f219fa3ae2423d4f252 — 200 — 31.8 KiB — 27 ms — 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https://analytics.google.com/g/collect?v=2&tid=G-2750JE9XQG&gtm=45je64h1v877796827z871471078za20gzb71471078zd71471078&_p=1776816068609&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=1636875831.1776816069&frm=0&pscdl=noapi&rcb=18&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117512542~117884344&uid=&sid=1776816069&sct=1&seg=0&dl=https%3A%2F%2Fwww.ocn.ne.jp%2F&dt=OCN%E3%83%88%E3%83%83%E3%83%97%E3%83%9A%E3%83%BC%E3%82%B8&en=page_view&_fv=1&_nsi=1&_ss=1&ep.template=sp&ep.UserAgent=Mozilla%2F5.0%20(Linux%3B%20Android%2011%3B%20moto%20g%20power%20(2022))%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F146.0.0.0%20Mobile%20Safari%2F537.36&ep.top=1&ep.line_identify=undefined&ep.upnavi_status=open_mypagesupport&ep.logintype=&up.USER_ID_FOR_GA=&up.login=0&up.da_cookie_id=&tfd=1880 — 204 — 548 B — 75 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-2750JE9XQG&cid=1636875831.1776816069&gtm=45je64h1v877796827z871471078za20gzb71471078zd71471078&rcb=18&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115938466~115938469~117266401~117512542~117884344stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-2750JE9XQG&cid=1636875831.1776816069&gtm=45je64h1v877796827z871471078za20gzb71471078zd71471078&rcb=18&aip=1&dma=0&gcd=13l3l3l3l1l1&npa=0&frm=0&tag_exp=0~115938466~115938469~117266401~117512542~117884344 — 204 — 548 B — 62 ms — h2https://www.googletagmanager.com/gtag/js?id=G-5XDKHMB5SV&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-5XDKHMB5SV&cx=c&gtm=4e64h1 — 200 — 143.5 KiB — 83 ms — h3https://www.googletagmanager.com/gtag/js?id=G-2VYT9C383M&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-2VYT9C383M&cx=c&gtm=4e64h1 — 200 — 150.8 KiB — 77 ms — h3https://www.ocn.ne.jp/favicon.icowww.ocn.ne.jp/favicon.ico https://www.ocn.ne.jp/favicon.ico — 200 — 1.7 KiB — 13 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 3448ms · 798KB · ¥4765/mo
www.ocn.ne.jp
Other
Costly
Execution 1185ms
Transfer 54 KB
Monthly Cost ¥1637/mo
Google Tag Manager
Tag Manager
Costly
Execution 580ms
Transfer 134 KB
Unused 45%
Monthly Cost ¥801/mo
Unattributable
Other
Costly
Execution 451ms
Transfer 0 KB
Monthly Cost ¥623/mo
Google Tag Manager
Tag Manager
Costly
Execution 326ms
Transfer 151 KB
Unused 43%
Monthly Cost ¥450/mo
Google Tag Manager
Tag Manager
Costly
Execution 261ms
Transfer 133 KB
Unused 48%
Monthly Cost ¥361/mo
www.ocn.ne.jp
Other
Costly
Execution 232ms
Transfer 32 KB
Monthly Cost ¥321/mo
Google Tag Manager
Tag Manager
Costly
Execution 229ms
Transfer 151 KB
Unused 50%
Monthly Cost ¥316/mo
Google Tag Manager
Tag Manager
Costly
Execution 184ms
Transfer 144 KB
Unused 51%
Monthly Cost ¥255/mo

These scripts may cost more than they're worth

  • www.ocn.ne.jp adds 1185ms and costs ~¥1637/month
  • Google Tag Manager adds 580ms and costs ~¥801/month
  • Unattributable adds 451ms and costs ~¥623/month
  • Google Tag Manager adds 326ms and costs ~¥450/month
  • Google Tag Manager adds 261ms and costs ~¥361/month
  • www.ocn.ne.jp adds 232ms and costs ~¥321/month
  • Google Tag Manager adds 229ms and costs ~¥316/month
  • Google Tag Manager adds 184ms and costs ~¥255/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

www.ocn.ne.jp takes 1185ms 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 580ms 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 451ms 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 326ms 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 261ms 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

www.ocn.ne.jp takes 232ms 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 229ms 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 184ms 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

51% 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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