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https://seesaa.net

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
4
PASS
5
INFO
2

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

Mobile Desktop
58
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
82
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

3.14 s

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

5.99 s

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

24 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.

3.36 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.

6.10 s

Page Load Progression

467 ms
935 ms
1.4 s
1.9 s
2.3 s
2.8 s
3.3 s
3.7 s
Checks
15
5 PASS 4 REVIEW 4 FIX
F
Page Weight Budget
Action
7.9 MB transferred, 64 requests
FIX
7.9 MB transferred, 64 requests
Critical::
Page weighs 9.2 MB (7.9 MB transferred)
Warning::
Images are 7.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 7.2 MB
Warning::
JavaScript is 567 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 567 KB
Info::
64 HTTP requests
Info::
Estimated 1.7 g CO2 per page load
7.9 MB / 2.4 MB budget
7.9 MB transferred
64 requests
1.7 g CO2 per page load
Images 7.2 MiB 91%
JavaScript 567.2 KiB 7%
Fonts 74.2 KiB 1%
Other 33.3 KiB 0%
CSS 21.7 KiB 0%
HTML 7.2 KiB 0%
Other 568 B 0%
Other 548 B 0%
Other 406 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 (7.9 MiB of 7.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
64 resources · 7.9 MB · 294 KB savings available
FIX
64 resources · 7.9 MB · 294 KB savings available
Warning::
Page weight 6.9 MB over 1MB target
Got: 7.9 MB Expected: ≤ 1 MB
Info::
~294 KB of savings available
Warning::
63 third-party resources (100% of weight)
Info::
4 resources over 200KB
64 resources · 7.9 MiB · 63 third-party 6.9 MiB over 1MB target
Image 91% · 7.2 MiB
JavaScript 7% · 567.2 KiB
Font 1% · 74.2 KiB
Other 0% · 24.2 KiB
CSS 0% · 21.7 KiB
Document 0% · 7.6 KiB

~294.4 KiB of savings available

Remove unused JavaScript: 294.4 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.

B
Image Optimization
30 images, 0 KB saveable
REVIEW
30 images, 0 KB saveable
Warning::
https://blog.seesaa.jp/portal/img/svg/logo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
30 images 7.2 MB
0 oversized -0 KB
30 legacy format
1 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Execution Cost
810ms total JS execution
REVIEW
810ms total JS execution
Warning::
https://blog.seesaa.jp/: 411ms CPU time
Info::
Unattributable: 142ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-QJNE...: 103ms CPU time
Info::
https://securepubads.g.doubleclick.net/pagead/mana...: 83ms CPU time
Info::
https://fundingchoicesmessages.google.com/i/213445...: 71ms CPU time
Warning::
Third-party scripts: 810ms (100% of total)

Main Thread Breakdown

Style & Layout 40% Script Evaluation 32% Other 19% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://blog.seesaa.jp/411ms2ms1ms3rd
Unattributable142ms5ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-QJNE30TF4L103ms79ms16ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js83ms59ms21ms3rd
https://fundingchoicesmessages.google.com/i/21344574?ers=371ms63ms7ms3rd
C
JS Bundles
Action
14 scripts, 294 KB unused
REVIEW
14 scripts, 294 KB unused
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 136 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QJNE...: 62 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://pagead2.googlesyndication.com/pagead/js/ad...: 37 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/213445...: 37 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ajax.googleapis.com/ajax/libs/jquery/1.12....: 23 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 294 KB
294 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB136 KB (72%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QJNE30TF4L151 KB62 KB (41%)✓3rd
https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?fcd=true54 KB37 KB (68%)✓3rd
https://fundingchoicesmessages.google.com/i/21344574?ers=370 KB37 KB (53%)✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js34 KB23 KB (70%)✓3rd
https://dmp.im-apps.net/sdk/im-uid.js3 KB—✓3rd
https://ad.ad-stir.com/ad?app_id=MEDIA-136253eb&ad_spot_no=32&locale=en&ut=1776813981190&topframe=1&origin=https%3A%2F%2Fblog.seesaa.jp%2F&secure=1&sw=800&sh=600&dpr=1&novideo=0&topurl=1&adstir_media_uid=8b5ec87b-12a7-4acb-b8e8-fbf65d22a50b&adstir_optout=1&c_vp=1&media_fq_count=1&callback=AdstirCB7378667347A84189466220 KB—✓3rd
https://www.googletagservices.com/tag/js/gpt.js34 KB—✓3rd
https://js.ad-stir.com/js/adstir.js25 KB—✓3rd
https://fundingchoicesmessages.google.com/f/AGSKWxW5ERWN0KJnuKbMJfm1INhhKaIVj6eP74oIWf47mbKNQC8Zw2Rd22jrkBlCyjD83feWRLwiK89EPFXYAC7wA3qYLM-10lWIxacC6b5bMlAJ83u1BRiBkhoZEI9JcQujvyryLPi04Q==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODEzOTgxLDkxNzAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly9ibG9nLnNlZXNhYS5qcC8iLG51bGwsW1s4LCJEc0tHTi1xcWZyUSJdLFs5LCJlbi1VUyJdLFsxOCwiW1tbbnVsbCwyNzk2XV1dIl0sWzM1LCIxNzc2ODEzOTgxIl0sWzI2LCIxNyJdLFsxOSwiMiJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbOTUzODYxODldXSJdLFsyOSwiZmFsc2UiXV1d2 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

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
1 fonts (74 KB)
PASS
1 fonts (74 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

74 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.1 s LCP 6.0 shttps://blog.seesaa.jp/portal/css/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://blog.seesaa.jp/portal/css/webfonts/fa-solid-900.woff2 — 74.2 KiB — 813 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 74 KB
Load time 813 ms
Start 3.4 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
Network Waterfall
64 requests over 4591ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.1 s LCP 6.0 shttps://seesaa.net// https://seesaa.net/ — 302 — 175 B — 824 ms — http/1.1https://blog.seesaa.jp/blog.seesaa.jp/ https://blog.seesaa.jp/ — 200 — 7.0 KiB — 859 ms — http/1.1https://blog.seesaa.jp/portal/css/pc.css?v=1.0.8blog.seesaa.jp/portal/css/pc.css?v=... https://blog.seesaa.jp/portal/css/pc.css?v=1.0.8 — 200 — 21.7 KiB — 563 ms — http/1.1https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.jsajax.googleapis.com/ajax/libs/jquer... https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js — 200 — 33.9 KiB — 69 ms — h2https://blog.seesaa.jp/portal/js/pc.js?v=1.0.8blog.seesaa.jp/portal/js/pc.js?v=1.... https://blog.seesaa.jp/portal/js/pc.js?v=1.0.8 — 200 — 225 B — 279 ms — http/1.1https://blog.seesaa.jp/portal/img/svg/logo.svgblog.seesaa.jp/portal/img/svg/logo.... https://blog.seesaa.jp/portal/img/svg/logo.svg — 200 — 2.8 KiB — 489 ms — http/1.1https://js.ad-stir.com/js/adstir.jsjs.ad-stir.com/js/adstir.js https://js.ad-stir.com/js/adstir.js — 200 — 25.1 KiB — 116 ms — h2https://www.googletagmanager.com/gtag/js?id=G-QJNE30TF4Lwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-QJNE30TF4L — 200 — 151.2 KiB — 286 ms — h2https://blog.seesaa.jp/portal/img/svg/ssl.svgblog.seesaa.jp/portal/img/svg/ssl.s... https://blog.seesaa.jp/portal/img/svg/ssl.svg — 200 — 781 B — 281 ms — http/1.1https://blog.seesaa.jp/portal/img/svg/ads.svgblog.seesaa.jp/portal/img/svg/ads.s... https://blog.seesaa.jp/portal/img/svg/ads.svg — 200 — 1.2 KiB — 290 ms — http/1.1https://blog.seesaa.jp/portal/img/svg/podcast.svgblog.seesaa.jp/portal/img/svg/podca... https://blog.seesaa.jp/portal/img/svg/podcast.svg — 200 — 1.1 KiB — 336 ms — http/1.1https://blog.seesaa.jp/portal/img/svg/blogs_x2.svgblog.seesaa.jp/portal/img/svg/blogs... https://blog.seesaa.jp/portal/img/svg/blogs_x2.svg — 200 — 1.2 KiB — 568 ms — http/1.1https://blog.seesaa.jp/portal/img/svg/domain.svgblog.seesaa.jp/portal/img/svg/domai... https://blog.seesaa.jp/portal/img/svg/domain.svg — 200 — 1.9 KiB — 624 ms — http/1.1https://blog.seesaa.jp/portal/img/svg/hdd.svgblog.seesaa.jp/portal/img/svg/hdd.s... https://blog.seesaa.jp/portal/img/svg/hdd.svg — 200 — 914 B — 824 ms — http/1.1https://www.googletagservices.com/tag/js/gpt.jswww.googletagservices.com/tag/js/gp... https://www.googletagservices.com/tag/js/gpt.js — 200 — 34.4 KiB — 128 ms — h2https://ad.ad-stir.com/ad?app_id=MEDIA-136253eb&ad_spot_no=32&locale=en&ut=1776813981190&topframe=1&origin=https%3A%2F%2Fblog.seesaa.jp%2F&secure=1&sw=800&sh=600&dpr=1&novideo=0&topurl=1&adstir_media_uid=8b5ec87b-12a7-4acb-b8e8-fbf65d22a50b&adstir_optout=1&c_vp=1&media_fq_count=1&callback=AdstirCB7378667347A8418946622ad.ad-stir.com/ad?app_id=MEDIA-1362... https://ad.ad-stir.com/ad?app_id=MEDIA-136253eb&ad_spot_no=32&locale=en&ut=1776813981190&topframe=1&origin=https%3A%2F%2Fblog.seesaa.jp%2F&secure=1&sw=800&sh=600&dpr=1&novideo=0&topurl=1&adstir_media_uid=8b5ec87b-12a7-4acb-b8e8-fbf65d22a50b&adstir_optout=1&c_vp=1&media_fq_count=1&callback=AdstirCB7378667347A8418946622 — 404 — 80 B — 900 ms — h2https://blog.seesaa.jp/portal/img/main.jpgblog.seesaa.jp/portal/img/main.jpg https://blog.seesaa.jp/portal/img/main.jpg — 200 — 327.9 KiB — 1.3 s — http/1.1https://blog.seesaa.jp/portal/img/svg/rss.svgblog.seesaa.jp/portal/img/svg/rss.s... https://blog.seesaa.jp/portal/img/svg/rss.svg — 200 — 757 B — 537 ms — http/1.1https://dmp.im-apps.net/sdk/im-uid.jsdmp.im-apps.net/sdk/im-uid.js https://dmp.im-apps.net/sdk/im-uid.js — 200 — 3.0 KiB — 45 ms — h2https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.jssecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js — 200 — 187.7 KiB — 98 ms — h3https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gptsecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gpt — 200 — 23.0 KiB — 92 ms — h3https://analytics.google.com/g/collect?v=2&tid=G-QJNE30TF4L&gtm=45je64h1v877115680za200zd877115680&_p=1776813981137&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=1863054378.1776813981&frm=0&pscdl=noapi&rcb=6&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401&sid=1776813981&sct=1&seg=0&dl=https%3A%2F%2Fblog.seesaa.jp%2F&dt=Seesaa%E3%83%96%E3%83%AD%E3%82%B0%EF%BC%88%E3%82%B7%E3%83%BC%E3%82%B5%E3%83%BC%EF%BC%89%EF%BC%9A%E7%84%A1%E6%96%99%E3%81%A7%E3%82%A2%E3%83%95%E3%82%A3%E3%83%AA%E3%82%A8%E3%82%A4%E3%83%88%E3%81%8B%E3%82%89%E3%81%BE%E3%81%A8%E3%82%81%E3%83%96%E3%83%AD%E3%82%B0%E3%81%BE%E3%81%A7&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=2630analytics.google.com/g/collect?v=2&... https://analytics.google.com/g/collect?v=2&tid=G-QJNE30TF4L&gtm=45je64h1v877115680za200zd877115680&_p=1776813981137&_gaz=1&gcd=13l3l3l3l1l1&npa=0&dma=0&_eu=AAAAAGA&are=1&cid=1863054378.1776813981&frm=0&pscdl=noapi&rcb=6&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401&sid=1776813981&sct=1&seg=0&dl=https%3A%2F%2Fblog.seesaa.jp%2F&dt=Seesaa%E3%83%96%E3%83%AD%E3%82%B0%EF%BC%88%E3%82%B7%E3%83%BC%E3%82%B5%E3%83%BC%EF%BC%89%EF%BC%9A%E7%84%A1%E6%96%99%E3%81%A7%E3%82%A2%E3%83%95%E3%82%A3%E3%83%AA%E3%82%A8%E3%82%A4%E3%83%88%E3%81%8B%E3%82%89%E3%81%BE%E3%81%A8%E3%82%81%E3%83%96%E3%83%AD%E3%82%B0%E3%81%BE%E3%81%A7&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=2630 — 204 — 548 B — 173 ms — 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h2https://packyaramared.up.seesaa.net/image/E784A1E9A18C798_20260422065749-thumbnail2.pngpackyaramared.up.seesaa.net/image/E... https://packyaramared.up.seesaa.net/image/E784A1E9A18C798_20260422065749-thumbnail2.png — 200 — 124.7 KiB — 136 ms — h2https://friskies.up.seesaa.net/image/IMG_20260422_072204-thumbnail2.jpgfriskies.up.seesaa.net/image/IMG_20... https://friskies.up.seesaa.net/image/IMG_20260422_072204-thumbnail2.jpg — 200 — 40.6 KiB — 113 ms — h2https://sinapon16.up.seesaa.net/image/PXL_20260419_0124176727E2-thumbnail2.jpgsinapon16.up.seesaa.net/image/PXL_2... https://sinapon16.up.seesaa.net/image/PXL_20260419_0124176727E2-thumbnail2.jpg — 200 — 125.9 KiB — 134 ms — h2https://aitoheiwanocranking.up.seesaa.net/image/-nmefpe-thumbnail2.jpgaitoheiwanocranking.up.seesaa.net/i... https://aitoheiwanocranking.up.seesaa.net/image/-nmefpe-thumbnail2.jpg — 200 — 94.7 KiB — 103 ms — h2https://zoroku24.up.seesaa.net/image/20260422070306-thumbnail2.jpgzoroku24.up.seesaa.net/image/202604... https://zoroku24.up.seesaa.net/image/20260422070306-thumbnail2.jpg — 200 — 95.9 KiB — 124 ms — h2https://mv-gossip.up.seesaa.net/image/12-c61c3.pngmv-gossip.up.seesaa.net/image/12-c6... https://mv-gossip.up.seesaa.net/image/12-c61c3.png — 200 — 53.7 KiB — 48 ms — h2https://news4wide.up.seesaa.net/image/hate_speech.pngnews4wide.up.seesaa.net/image/hate_... https://news4wide.up.seesaa.net/image/hate_speech.png — 200 — 97.5 KiB — 41 ms — h2https://femimatsu.up.seesaa.net/image/E382B9E382AFE383AAE383BCE383B3E382B7E383A7E38383E38388202026-04-06207.08.15-5cbb0.pngfemimatsu.up.seesaa.net/image/E382B... https://femimatsu.up.seesaa.net/image/E382B9E382AFE383AAE383BCE383B3E382B7E383A7E38383E38388202026-04-06207.08.15-5cbb0.png — 200 — 2.6 MiB — 211 ms — h2https://vsnp.up.seesaa.net/image/kaigo_rourou_easy-7ba48.pngvsnp.up.seesaa.net/image/kaigo_rour... https://vsnp.up.seesaa.net/image/kaigo_rourou_easy-7ba48.png — 200 — 104.0 KiB — 86 ms — 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https://fundingchoicesmessages.google.com/f/AGSKWxU-R6QlcB-awzhtBDPgta_UwbWNi2hpD9ZrlmWy0meoO9lu9DgdgUqDXx-sTmf2XZ1xAN0ixukDfz9FBfZFw3JOjqmkFBw4WgVHQFTvF3SC12ikHRgjfbsbMR3eoQezBmQ_55eQCg==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODEzOTgyLDQyOTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzcsOV0sbnVsbCwyLG51bGwsImVuIl0sImh0dHBzOi8vYmxvZy5zZWVzYWEuanAvIixudWxsLFtbOCwiRHNLR04tcXFmclEiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsMjc5Nl1dXSJdLFszNSwiMTc3NjgxMzk4MSJdLFsyNiwiMTciXSxbMTksIjIiXSxbMTcsIlswXSJdLFsyNCwiIl0sWzI1LCJbWzk1Mzg2MTg5XV0iXSxbMjksImZhbHNlIl1dXQ — 200 — 4.2 KiB — 73 ms — h3https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 121 ms — h3https://blog.seesaa.jp/portal/img/favicons/icon-192x192.pngblog.seesaa.jp/portal/img/favicons/... https://blog.seesaa.jp/portal/img/favicons/icon-192x192.png — 200 — 10.2 KiB — 273 ms — 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h3https://fundingchoicesmessages.google.com/el/AGSKWxW_OH2FtCeJ7oOKq837jkdkIhl2P2_6_9MJPJyUGZA5LVautkIWUZ285R-vjvOcRkVSc0DP-mjC2SXDFn39FQx0bX-QzwzlV7FnpeEm0_yPABR27OXKzgcGVgOTYsbHv-wQrSychA==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxW_OH2FtCeJ7oOKq837jkdkIhl2P2_6_9MJPJyUGZA5LVautkIWUZ285R-vjvOcRkVSc0DP-mjC2SXDFn39FQx0bX-QzwzlV7FnpeEm0_yPABR27OXKzgcGVgOTYsbHv-wQrSychA== — 204 — 28 B — 68 ms — h3https://fundingchoicesmessages.google.com/el/AGSKWxW_OH2FtCeJ7oOKq837jkdkIhl2P2_6_9MJPJyUGZA5LVautkIWUZ285R-vjvOcRkVSc0DP-mjC2SXDFn39FQx0bX-QzwzlV7FnpeEm0_yPABR27OXKzgcGVgOTYsbHv-wQrSychA==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxW_OH2FtCeJ7oOKq837jkdkIhl2P2_6_9MJPJyUGZA5LVautkIWUZ285R-vjvOcRkVSc0DP-mjC2SXDFn39FQx0bX-QzwzlV7FnpeEm0_yPABR27OXKzgcGVgOTYsbHv-wQrSychA== — 204 — 28 B — 62 ms — 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h3https://fundingchoicesmessages.google.com/f/AGSKWxV0TKSqixNm_uNibimks89jDqZsBGpLh9SNctfZRqqm2Wdnvdp-Iy9nUs54uAWiafOUKkAAHtJKoygRCSFIPuJa7m-hmAJC12SN4Gvt00q3LTIuVD3hfL4C--OSBRGeLeQSyy3clQ==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODEzOTgzLDI4NTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzcsOSw2XSxudWxsLDIsbnVsbCwiZW4iLG51bGwsbnVsbCxudWxsLG51bGwsbnVsbCwxXSwiaHR0cHM6Ly9ibG9nLnNlZXNhYS5qcC8iLG51bGwsW1s4LCJEc0tHTi1xcWZyUSJdLFs5LCJlbi1VUyJdLFsxOCwiW1tbbnVsbCwyNzk2XV1dIl0sWzM1LCIxNzc2ODEzOTgxIl0sWzI2LCIxNyJdLFsxOSwiMiJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbOTUzODYxODldXSJdLFsyOSwiZmFsc2UiXV1dfundingchoicesmessages.google.com/f... https://fundingchoicesmessages.google.com/f/AGSKWxV0TKSqixNm_uNibimks89jDqZsBGpLh9SNctfZRqqm2Wdnvdp-Iy9nUs54uAWiafOUKkAAHtJKoygRCSFIPuJa7m-hmAJC12SN4Gvt00q3LTIuVD3hfL4C--OSBRGeLeQSyy3clQ==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODEzOTgzLDI4NTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzcsOSw2XSxudWxsLDIsbnVsbCwiZW4iLG51bGwsbnVsbCxudWxsLG51bGwsbnVsbCwxXSwiaHR0cHM6Ly9ibG9nLnNlZXNhYS5qcC8iLG51bGwsW1s4LCJEc0tHTi1xcWZyUSJdLFs5LCJlbi1VUyJdLFsxOCwiW1tbbnVsbCwyNzk2XV1dIl0sWzM1LCIxNzc2ODEzOTgxIl0sWzI2LCIxNyJdLFsxOSwiMiJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbOTUzODYxODldXSJdLFsyOSwiZmFsc2UiXV1d — 200 — 1.6 KiB — 83 ms — h3https://fundingchoicesmessages.google.com/el/AGSKWxV5XvQQZHGADw0XrF1YcqBJUfevXR1BN9OJb0RBcMY4HmyL28w8-S1-bSOjFzbDhHKyTvHQdhPt8vh459voA8X8A5GOKoBmiwVMtpHwdi-l52OoYYgmNZ1RcZffdH3B5F0Vl2jwAw==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxV5XvQQZHGADw0XrF1YcqBJUfevXR1BN9OJb0RBcMY4HmyL28w8-S1-bSOjFzbDhHKyTvHQdhPt8vh459voA8X8A5GOKoBmiwVMtpHwdi-l52OoYYgmNZ1RcZffdH3B5F0Vl2jwAw== — 204 — 28 B — 73 ms — h3
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 810ms · 416KB · ¥1119/mo
blog.seesaa.jp
Other
Costly
Execution 411ms
Transfer 7 KB
Monthly Cost ¥568/mo
Unattributable
Other
Costly
Execution 142ms
Transfer 0 KB
Monthly Cost ¥196/mo
Google Tag Manager
Tag Manager
Costly
Execution 103ms
Transfer 151 KB
Unused 41%
Monthly Cost ¥142/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 83ms
Transfer 188 KB
Unused 72%
Monthly Cost ¥114/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 71ms
Transfer 70 KB
Unused 53%
Monthly Cost ¥98/mo

These scripts may cost more than they're worth

  • blog.seesaa.jp adds 411ms and costs ~¥568/month
  • Unattributable adds 142ms and costs ~¥196/month
  • Google Tag Manager adds 103ms and costs ~¥142/month
  • securepubads.g.doubleclick.net adds 83ms and costs ~¥114/month
  • fundingchoicesmessages.google.com adds 71ms and costs ~¥98/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

blog.seesaa.jp takes 411ms 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 142ms 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 103ms 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

securepubads.g.doubleclick.net takes 83ms 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

72% of securepubads.g.doubleclick.net'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

fundingchoicesmessages.google.com takes 71ms 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

53% of fundingchoicesmessages.google.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

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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