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https://kyoto-u.ac.jp

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
78
GRADE
C
FIX
4
REVIEW
4
PASS
7
INFO
2

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

Mobile Desktop
52
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
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.

11.42 s

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

14.96 s

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

224 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.

11.42 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.

15.00 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 4 REVIEW 4 FIX
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 (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2202ms total JS execution
FIX
2202ms total JS execution
Warning::
https://www.kyoto-u.ac.jp/sites/default/files/js/j...: 803ms CPU time
Warning::
Unattributable: 540ms CPU time
Warning::
https://www.kyoto-u.ac.jp/ja: 380ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-P51J...: 184ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PVP...: 168ms CPU time
Warning::
Third-party scripts: 2202ms (100% of total)

Main Thread Breakdown

Style & Layout 40% Script Evaluation 25% Other 23% Rendering 6% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.kyoto-u.ac.jp/sites/default/files/js/js_3wLlTtZB4ydNzDsfU_DCRct5H0cMVEMK90fneOskkE8.js?scope=footer&delta=1&language=ja&theme=camphor&include=eJxdzEEOwjAMRNELufWRkEksx8hpqthQwumBqgLB5kvzFpOorqV1zGOhqmkqTJk7pIPF2pls8himi3zYTTN7aRtIa2J8ChKUV_73TBe6_2IFo8fAd8CDQj00OeZ-Xcnmr8BNeXPcu988ATcxQl0803ms128ms16ms3rd
Unattributable540ms80ms0ms3rd
https://www.kyoto-u.ac.jp/ja380ms4ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-P51JW1MC7Y&cx=c&gtm=4e64h1184ms142ms41ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PVPH2PW168ms130ms36ms3rd
https://www.kyoto-u.ac.jp/libraries/lazysizes/lazysizes.min.js128ms51ms1ms3rd
D
Page Weight Inventory
Action
96 resources · 1.8 MB · 152 KB savings available
FIX
96 resources · 1.8 MB · 152 KB savings available
Warning::
Page weight 817 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~152 KB of savings available
Warning::
95 third-party resources (100% of weight)
96 resources · 1.8 MiB · 95 third-party 817.0 KiB over 1MB target
Font 57% · 1.0 MiB
JavaScript 19% · 351.9 KiB
Image 18% · 324.1 KiB
CSS 5% · 94.7 KiB
Document 1% · 24.4 KiB
Other 0% · 1.1 KiB

~151.6 KiB of savings available

Remove unused JavaScript: 151.6 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
Page Weight Budget
Action
1.8 MB transferred, 96 requests
REVIEW
1.8 MB transferred, 96 requests
Info::
Page weighs 3.0 MB (1.8 MB transferred)
Info::
Fonts are 1.0 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.0 MB
Info::
96 HTTP requests
Info::
Estimated 0.38 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
96 requests
0.38 g CO2 per page load
Fonts 1.0 MiB 57%
JavaScript 351.9 KiB 19%
Images 319.5 KiB 17%
CSS 94.7 KiB 5%
HTML 23.6 KiB 1%
Other 5.3 KiB 0%
Other 560 B 0%
Other 551 B 0%
Other 150 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
29 images, 0 KB saveable
REVIEW
29 images, 0 KB saveable
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.kyoto-u.ac.jp/themes/custom/camphor/im... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
29 images 319 KB
0 oversized -0 KB
25 legacy format
7 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

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
JS Bundles
Action
8 scripts, 152 KB unused
REVIEW
8 scripts, 152 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-P51J...: 64 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PVP...: 63 KB unused (54%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.kyoto-u.ac.jp/sites/default/files/js/j...: 25 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 152 KB
152 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-P51JW1MC7Y&cx=c&gtm=4e64h1154 KB64 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PVPH2PW117 KB63 KB (54%)✓3rd
https://www.kyoto-u.ac.jp/sites/default/files/js/js_3wLlTtZB4ydNzDsfU_DCRct5H0cMVEMK90fneOskkE8.js?scope=footer&delta=1&language=ja&theme=camphor&include=eJxdzEEOwjAMRNELufWRkEksx8hpqthQwumBqgLB5kvzFpOorqV1zGOhqmkqTJk7pIPF2pls8himi3zYTTN7aRtIa2J8ChKUV_73TBe6_2IFo8fAd8CDQj00OeZ-Xcnmr8BNeXPcu988ATcxQl043 KB25 KB (58%)✓3rd
https://www.kyoto-u.ac.jp/sites/default/files/js/js_nLEIK4XX99YtlyCTslopx58sCv5mvfcCH4DM7PQ_APo.js?scope=header&delta=0&language=ja&theme=camphor&include=eJxdzEEOwjAMRNELufWRkEksx8hpqthQwumBqgLB5kvzFpOorqV1zGOhqmkqTJk7pIPF2pls8himi3zYTTN7aRtIa2J8ChKUV_73TBe6_2IFo8fAd8CDQj00OeZ-Xcnmr8BNeXPcu988ATcxQl00 KB—✓3rd
https://www.kyoto-u.ac.jp/modules/contrib/google_tag/js/gtag.js?tcr8t91 KB—✓3rd
https://www.kyoto-u.ac.jp/modules/contrib/google_tag/js/gtm.js?tcr8t91 KB—✓3rd
https://www.kyoto-u.ac.jp/core/assets/vendor/jquery/jquery.min.js?v=4.0.0-rc.132 KB—✓3rd
https://www.kyoto-u.ac.jp/libraries/lazysizes/lazysizes.min.js4 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

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
45 fonts (1045 KB)
PASS
45 fonts (1045 KB)
Info::
45 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

45

1045 KB total

Render-blocking

0

of 45

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 12.0 s 14.0 s FCP 11.4 s LCP 15.0 shttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFYwQgP-FVthw.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFYwQgP-FVthw.woff2 — 24.4 KiB — 36 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.119.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.119.woff2 — 77.2 KiB — 165 ms — font-display: swaphttps://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2flUhRq6tzZclQEJ-Vdg-Iui... https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2 — 125.6 KiB — 191 ms — font-display: swaphttps://fonts.gstatic.com/s/lora/v37/0QI6MX1D_JOuGQbT0gvTJPa787wsuxJBkq18m9eY.woff20QI6MX1D_JOuGQbT0gvTJPa... https://fonts.gstatic.com/s/lora/v37/0QI6MX1D_JOuGQbT0gvTJPa787wsuxJBkq18m9eY.woff2 — 21.3 KiB — 184 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.117.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.117.woff2 — 11.5 KiB — 56 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.114.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.114.woff2 — 14.1 KiB — 64 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.116.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.116.woff2 — 16.1 KiB — 66 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.113.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.113.woff2 — 14.5 KiB — 69 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.85.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.85.woff2 — 17.2 KiB — 72 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.115.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.115.woff2 — 15.7 KiB — 74 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.111.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.111.woff2 — 16.6 KiB — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.109.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.109.woff2 — 14.9 KiB — 78 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.108.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.108.woff2 — 18.1 KiB — 90 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.92.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.92.woff2 — 18.5 KiB — 100 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.112.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.112.woff2 — 15.5 KiB — 91 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.118.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.118.woff2 — 18.0 KiB — 103 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.107.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.107.woff2 — 16.3 KiB — 117 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.105.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.105.woff2 — 17.2 KiB — 111 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.90.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.90.woff2 — 18.5 KiB — 119 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.103.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.103.woff2 — 16.3 KiB — 106 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.94.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.94.woff2 — 17.7 KiB — 182 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.110.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.110.woff2 — 15.5 KiB — 109 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.80.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.80.woff2 — 17.9 KiB — 181 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.104.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.104.woff2 — 17.4 KiB — 101 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.97.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.97.woff2 — 17.1 KiB — 119 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.106.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.106.woff2 — 19.1 KiB — 98 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.21.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.21.woff2 — 70.3 KiB — 184 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.78.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.78.woff2 — 19.6 KiB — 124 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.77.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.77.woff2 — 18.5 KiB — 180 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.99.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.99.woff2 — 18.9 KiB — 121 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.81.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.81.woff2 — 17.3 KiB — 142 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.93.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.93.woff2 — 16.7 KiB — 182 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.98.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.98.woff2 — 18.3 KiB — 145 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.86.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.86.woff2 — 16.6 KiB — 139 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.96.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.96.woff2 — 16.6 KiB — 151 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.87.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.87.woff2 — 18.9 KiB — 149 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.75.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.75.woff2 — 18.5 KiB — 180 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.100.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.100.woff2 — 19.7 KiB — 136 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.102.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.102.woff2 — 17.1 KiB — 180 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.95.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.95.woff2 — 16.9 KiB — 179 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.84.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.84.woff2 — 18.5 KiB — 156 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.67.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.67.woff2 — 17.8 KiB — 129 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.88.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.88.woff2 — 17.0 KiB — 125 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.20.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.20.woff2 — 59.9 KiB — 180 ms — font-display: swaphttps://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.101.woff2-F62fjtqLzI2JPCgQBnw7HF... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.101.woff2 — 15.4 KiB — 123 ms — font-display: swap
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 24 KB
Load time 36 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 77 KB
Load time 165 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
flUhRq6tzZclQEJ-Vdg-Iui... woff2 swap
Size 126 KB
Load time 191 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
0QI6MX1D_JOuGQbT0gvTJPa... woff2 swap
Size 21 KB
Load time 184 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 12 KB
Load time 56 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 14 KB
Load time 64 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 16 KB
Load time 66 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 15 KB
Load time 69 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 72 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 16 KB
Load time 74 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 77 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 15 KB
Load time 78 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 90 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 100 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 15 KB
Load time 91 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 103 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 16 KB
Load time 117 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 111 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 119 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 16 KB
Load time 106 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 182 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 16 KB
Load time 109 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 181 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 101 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 119 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 19 KB
Load time 98 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 70 KB
Load time 184 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 20 KB
Load time 124 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 19 KB
Load time 180 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 19 KB
Load time 121 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 142 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 182 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 145 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 139 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 151 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 19 KB
Load time 149 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 19 KB
Load time 180 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 20 KB
Load time 136 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 180 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 179 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 19 KB
Load time 156 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 18 KB
Load time 129 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 17 KB
Load time 125 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 60 KB
Load time 180 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
-F62fjtqLzI2JPCgQBnw7HF... woff2 swap
Size 15 KB
Load time 123 ms
Start 1.2 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)

Fixing the unchecked items could save ~63 KB and ~126 ms

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
96 requests over 3974ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 11.4 s LCP 15.0 shttps://kyoto-u.ac.jp// https://kyoto-u.ac.jp/ — 301 — 274 B — 10 ms — h2https://www.kyoto-u.ac.jp/www.kyoto-u.ac.jp/ https://www.kyoto-u.ac.jp/ — 301 — 432 B — 234 ms — h2https://www.kyoto-u.ac.jp/jawww.kyoto-u.ac.jp/ja https://www.kyoto-u.ac.jp/ja — 200 — 23.6 KiB — 5 ms — h2https://www.kyoto-u.ac.jp/sites/default/files/css/css_UeKMEukKSIs_rSBm3NLXGZ_B9K_DPt5UqaQQ5PAapIk.css?delta=0&language=ja&theme=camphor&include=eJxlzksOwyAMBNALkXCkyIAFNAYjDEnp6ftJky66sTxPsjUWUglctSc2QJO0QTF7Zb9M6MGOP87scKIo7RKh6FAC78oSiAxtQPDcE4qARznz-1xZrqhd7QVohhvcD8hcE1B8oFr74kCCYahOr326giIY3NvioljesA7NGS2TKlDBVyhBzr8_mXsu3bwqB3RKhjRMR8Ut4i76M-fErhM-AX5Hawkwww.kyoto-u.ac.jp/sites/default/fil... 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h3https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.90.woff2fonts.gstatic.com/s/notosansjp/v56/... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.90.woff2 — 200 — 18.5 KiB — 119 ms — h3https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.103.woff2fonts.gstatic.com/s/notosansjp/v56/... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.103.woff2 — 200 — 16.3 KiB — 106 ms — h3https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.94.woff2fonts.gstatic.com/s/notosansjp/v56/... https://fonts.gstatic.com/s/notosansjp/v56/-F62fjtqLzI2JPCgQBnw7HFowwII2lcnk-AFfrgQrvWXpdFg3KXxAMsKMbdN.94.woff2 — 200 — 17.7 KiB — 182 ms — 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h2https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-P51JW1MC7Y&cid=1083694485.1776810323&gtm=45je64h1v870846618z8870834482za20gzb870834482zd870834482&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266401~117512543&z=148919219www.google.es/ads/ga-audiences?v=1&... https://www.google.es/ads/ga-audiences?v=1&t=sr&slf_rd=1&_r=4&tid=G-P51JW1MC7Y&cid=1083694485.1776810323&gtm=45je64h1v870846618z8870834482za20gzb870834482zd870834482&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266401~117512543&z=148919219 — 200 — 408 B — 95 ms — 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https://region1.analytics.google.com/g/collect?v=2&tid=G-P51JW1MC7Y&gtm=45je64h1v870846618z8870834482za20gzb870834482zd870834482&_p=1776810322090&_gaz=1&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&gdid=dMDhkMT&_eu=AAAAAGA&are=1&cid=1083694485.1776810323&frm=0&pscdl=noapi&rcb=15&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938468~117266401~117512543&sid=1776810322&sct=1&seg=0&dl=https%3A%2F%2Fwww.kyoto-u.ac.jp%2Fja&dt=%E4%BA%AC%E9%83%BD%E5%A4%A7%E5%AD%A6&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1528 — 204 — 551 B — 93 ms — h2https://stats.g.doubleclick.net/g/collect?v=2&tid=G-P51JW1MC7Y&cid=1083694485.1776810323&gtm=45je64h1v870846618z8870834482za20gzb870834482zd870834482&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266401~117512543stats.g.doubleclick.net/g/collect?v... https://stats.g.doubleclick.net/g/collect?v=2&tid=G-P51JW1MC7Y&cid=1083694485.1776810323&gtm=45je64h1v870846618z8870834482za20gzb870834482zd870834482&rcb=15&aip=1&dma=1&dma_cps=a&gcd=13l3l3l2l1l1&npa=1&frm=0&tag_exp=0~115938466~115938468~117266401~117512543 — 204 — 560 B — 92 ms — h2https://www.kyoto-u.ac.jp/themes/custom/camphor/favicon.icowww.kyoto-u.ac.jp/themes/custom/cam... https://www.kyoto-u.ac.jp/themes/custom/camphor/favicon.ico — 200 — 4.4 KiB — 929 ms — h2https://www.kyoto-u.ac.jp/sites/default/files/styles/scale_crop_800x419/public/2026-04/2604_eye_murakami-39b42b057f30733bce883eac6e96b777.jpg.webp?itok=HRnpXPvpwww.kyoto-u.ac.jp/sites/default/fil... https://www.kyoto-u.ac.jp/sites/default/files/styles/scale_crop_800x419/public/2026-04/2604_eye_murakami-39b42b057f30733bce883eac6e96b777.jpg.webp?itok=HRnpXPvp — 200 — 33.2 KiB — 707 ms — h2https://www.kyoto-u.ac.jp/sites/default/files/styles/scale_crop_800x419/public/2026-04/2604_eye_Koga-511e81f3879d14a10d48cc36f5a806aa.jpg.webp?itok=EQjibu3Hwww.kyoto-u.ac.jp/sites/default/fil... https://www.kyoto-u.ac.jp/sites/default/files/styles/scale_crop_800x419/public/2026-04/2604_eye_Koga-511e81f3879d14a10d48cc36f5a806aa.jpg.webp?itok=EQjibu3H — 200 — 21.5 KiB — 689 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 2202ms · 342KB · ¥3043/mo
www.kyoto-u.ac.jp
Other
Costly
Execution 803ms
Transfer 43 KB
Unused 58%
Monthly Cost ¥1109/mo
Unattributable
Other
Costly
Execution 540ms
Transfer 0 KB
Monthly Cost ¥746/mo
www.kyoto-u.ac.jp
Other
Costly
Execution 380ms
Transfer 24 KB
Monthly Cost ¥524/mo
Google Tag Manager
Tag Manager
Costly
Execution 184ms
Transfer 154 KB
Unused 41%
Monthly Cost ¥254/mo
Google Tag Manager
Tag Manager
Costly
Execution 168ms
Transfer 117 KB
Unused 54%
Monthly Cost ¥232/mo
www.kyoto-u.ac.jp
Other
Costly
Execution 128ms
Transfer 4 KB
Monthly Cost ¥177/mo

These scripts may cost more than they're worth

  • www.kyoto-u.ac.jp adds 803ms and costs ~¥1109/month
  • Unattributable adds 540ms and costs ~¥746/month
  • www.kyoto-u.ac.jp adds 380ms and costs ~¥524/month
  • Google Tag Manager adds 184ms and costs ~¥254/month
  • Google Tag Manager adds 168ms and costs ~¥232/month
  • www.kyoto-u.ac.jp adds 128ms and costs ~¥177/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.kyoto-u.ac.jp takes 803ms 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

58% of www.kyoto-u.ac.jp'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

Unattributable takes 540ms 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.kyoto-u.ac.jp takes 380ms 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

Google Tag Manager takes 168ms 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

www.kyoto-u.ac.jp takes 128ms 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

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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