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https://sony.net

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
7
INFO
2

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

Mobile Desktop
12
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.
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.

5.84 s

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

57.78 s

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

136.96 s

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

0.267

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

14.84 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.

174.25 s

Page Load Progression

3.3 s
6.7 s
10.0 s
13.3 s
16.7 s
20.0 s
23.3 s
26.7 s
Checks
17
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
11.4 MB transferred, 133 requests
FIX
11.4 MB transferred, 133 requests
Critical::
Page weighs 13.7 MB (11.4 MB transferred)
Info::
Fonts are 8.6 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 8.6 MB
Warning::
Images are 2.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.0 MB
Warning::
JavaScript is 564 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 564 KB
Warning::
133 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.4 g CO2 per page load
11.4 MB / 2.4 MB budget
11.4 MB transferred
133 requests
2.4 g CO2 per page load
Fonts 8.6 MiB 76%
Images 2.0 MiB 18%
JavaScript 564.4 KiB 5%
Other 122.3 KiB 1%
CSS 53.0 KiB 0%
HTML 16.4 KiB 0%
Other 6.0 KiB 0%
Other 3.0 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

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

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 (11.4 MiB of 11.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
174184ms total JS execution
FIX
174184ms total JS execution
Warning::
https://www.sony.co.jp/en/assets_revamp2025/javasc...: 159332ms CPU time
Warning::
https://fast.fonts.net/jsapi/core/mt_otf.js: 7703ms CPU time
Warning::
Unattributable: 1800ms CPU time
Warning::
https://www.sony.co.jp/en/assets_revamp2025/javasc...: 1628ms CPU time
Warning::
https://www.sony.co.jp/en/: 1263ms CPU time
Warning::
Third-party scripts: 174184ms (100% of total)

Main Thread Breakdown

Other 90% Script Evaluation 7%
ScriptTotalScriptingParse/CompileParty
https://www.sony.co.jp/en/assets_revamp2025/javascripts/index-7d9a9c74.js159332ms2348ms1ms3rd
https://fast.fonts.net/jsapi/core/mt_otf.js7703ms7402ms11ms3rd
Unattributable1800ms245ms0ms3rd
https://www.sony.co.jp/en/assets_revamp2025/javascripts/page-initializer-bca07b23.js1628ms914ms0ms3rd
https://www.sony.co.jp/en/1263ms28ms2ms3rd
https://cdn.cookielaw.org/scripttemplates/202601.1.0/otBannerSdk.js450ms258ms72ms3rd
https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/pages/home/mission.js329ms187ms0ms3rd
https://www.sony.co.jp/en/assets_revamp2025/javascripts/pages/home.js322ms173ms0ms3rd
https://ce.mf.marsflag.com/v1/js/mf-search.js298ms224ms49ms3rd
https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/ui/heading.js253ms123ms0ms3rd

Showing top 10 of 16 scripts

D
Page Weight Inventory
Action
133 resources · 11.4 MB · 194 KB savings available
FIX
133 resources · 11.4 MB · 194 KB savings available
Warning::
Page weight 10.4 MB over 1MB target
Got: 11.4 MB Expected: ≤ 1 MB
Info::
~194 KB of savings available
Warning::
132 third-party resources (100% of weight)
Info::
6 resources over 200KB
133 resources · 11.4 MiB · 132 third-party 10.4 MiB over 1MB target
Font 76% · 8.6 MiB
Image 18% · 2.0 MiB
JavaScript 5% · 564.4 KiB
Other 1% · 120.5 KiB
CSS 0% · 57.6 KiB
Document 0% · 17.8 KiB

~194.0 KiB of savings available

Remove unused JavaScript: 194.0 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
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://www.sony.co.jp/en/ghh1ma0000000wie-img/pru... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.sony.co.jp/en/ghh1ma0000000wie-img/pru... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.sony.co.jp/en/ghh1ma0000000wie-img/cgs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.sony.co.jp/en/ghh1ma0000000wie-img/XYN... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 2.0 MB
0 oversized -0 KB
11 legacy format
4 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

C
JS Bundles
Action
67 scripts, 194 KB unused
REVIEW
67 scripts, 194 KB unused
Warning::
https://cdn.cookielaw.org/scripttemplates/202601.1...: 66 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ce.mf.marsflag.com/v1/js/mf-search.js: 60 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.sony.co.jp/en/assets_revamp2025/javasc...: 47 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.sony.co.jp/en/template/2022/v50/en/js/...: 21 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 194 KB
194 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.cookielaw.org/scripttemplates/202601.1.0/otBannerSdk.js127 KB66 KB (52%)✓3rd
https://ce.mf.marsflag.com/v1/js/mf-search.js116 KB60 KB (52%)✓3rd
https://www.sony.co.jp/en/assets_revamp2025/javascripts/PageBackground-5831f7fd.js115 KB47 KB (41%)✓3rd
https://www.sony.co.jp/en/template/2022/v50/en/js/jquery-3.6.0.min.js30 KB21 KB (70%)✓3rd
https://cdn.cookielaw.org/consent/0195ff30-005c-7fff-82fa-a2e779f40719/OtAutoBlock.js4 KB—✓3rd
https://cdn.cookielaw.org/consent/0195ff30-005c-7fff-82fa-a2e779f40719/otSDKStub.js10 KB—✓3rd
https://www.sony.co.jp/en/template/2018/v50/en/js/jquery.easing.1.3.js2 KB—✓3rd
https://www.sony.co.jp/en/template/2018/v50/en/js/jquery.cookie.js1 KB—✓3rd
https://www.sony.co.jp/en/template/2018/v50/en/js/includeCommon.js2 KB—✓3rd
https://www.sony.co.jp/en/template/2018/v50/en/js/tile.js1 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

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
8 fonts (8810 KB)
PASS
8 fonts (8810 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

8810 KB total

Render-blocking

0

of 8

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 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s FCP 5.8 s LCP 57.8 shttps://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_400.woff2SSTJapanesePro_normal_n... https://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_400.woff2 — 2.1 MiB — 364 ms — font-display: swaphttps://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_300.woff2SSTJapanesePro_normal_n... https://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_300.woff2 — 2.1 MiB — 796 ms — font-display: swaphttps://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_700.woff2SSTJapanesePro_normal_n... https://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_700.woff2 — 2.2 MiB — 535 ms — font-display: swaphttps://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_150.woff2SSTJapanesePro_normal_n... https://cdn.fonts.net/kit/dbf54f24-f8f1-473c-a89b-f71cac683dc6/SSTJapanese/SSTJapanesePro_normal_normal_150.woff2 — 2.0 MiB — 818 ms — font-display: swaphttps://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?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&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532f2c57125-0b07-4b47-9b3e... https://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?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&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532 — 111.8 KiB — 38 ms — font-display: swaphttps://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27-.0124567ABCDEFGHIJKLMNOPQRSTVWXabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm91FontSubsetter.ashx https://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27-.0124567ABCDEFGHIJKLMNOPQRSTVWXabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm91 — 10.6 KiB — 31 ms — font-display: swaphttps://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?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&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532f2c57125-0b07-4b47-9b3e... https://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?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&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532 — 321 B — 13 ms — font-display: swaphttps://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27(),-.0124567ABCDEFGHIJKLMNOPQRSTVWXYabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm849100FontSubsetter.ashx https://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27(),-.0124567ABCDEFGHIJKLMNOPQRSTVWXYabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm849100 — 10.7 KiB — 17 ms — font-display: swap
SSTJapanesePro_normal_n... woff2 swap
Size 2200 KB
Load time 364 ms
Start 1.6 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
SSTJapanesePro_normal_n... woff2 swap
Size 2201 KB
Load time 796 ms
Start 1.6 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
SSTJapanesePro_normal_n... woff2 swap
Size 2245 KB
Load time 535 ms
Start 1.6 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
SSTJapanesePro_normal_n... woff2 swap
Size 2030 KB
Load time 818 ms
Start 1.7 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
f2c57125-0b07-4b47-9b3e... woff2 swap
Size 112 KB
Load time 38 ms
Start 3.1 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
FontSubsetter.ashx woff2 swap
Size 11 KB
Load time 31 ms
Start 3.1 s
Risk FOUT — text flashes from fallback to web font
f2c57125-0b07-4b47-9b3e... woff2 swap
Size 0 KB
Load time 13 ms
Start 4.9 s
Risk FOUT — text flashes from fallback to web font
FontSubsetter.ashx woff2 swap
Size 11 KB
Load time 17 ms
Start 6.0 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 ~4394 KB and ~8788 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 resource hints configured

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
133 requests over 6206ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s 40.0 s 42.0 s 44.0 s 46.0 s 48.0 s 50.0 s 52.0 s 54.0 s 56.0 s 58.0 s 60.0 s FCP 5.8 s LCP 57.8 shttps://sony.net// https://sony.net/ — 301 — 198 B — 753 ms — http/1.1https://www.sony.net/www.sony.net/ https://www.sony.net/ — 302 — 295 B — 452 ms — h2https://www.sony.co.jp/en/www.sony.co.jp/en/ https://www.sony.co.jp/en/ — 200 — 16.4 KiB — 29 ms — h2https://cdn.cookielaw.org/consent/0195ff30-005c-7fff-82fa-a2e779f40719/OtAutoBlock.jscdn.cookielaw.org/consent/0195ff30-... https://cdn.cookielaw.org/consent/0195ff30-005c-7fff-82fa-a2e779f40719/OtAutoBlock.js — 200 — 4.2 KiB — 86 ms — h2https://cdn.cookielaw.org/consent/0195ff30-005c-7fff-82fa-a2e779f40719/otSDKStub.jscdn.cookielaw.org/consent/0195ff30-... https://cdn.cookielaw.org/consent/0195ff30-005c-7fff-82fa-a2e779f40719/otSDKStub.js — 200 — 9.8 KiB — 73 ms — h2https://www.sony.co.jp/en/template/2022/v50/en/js/jquery-3.6.0.min.jswww.sony.co.jp/en/template/2022/v50... https://www.sony.co.jp/en/template/2022/v50/en/js/jquery-3.6.0.min.js — 200 — 30.0 KiB — 146 ms — h2https://www.sony.co.jp/en/template/2018/v50/en/js/jquery.easing.1.3.jswww.sony.co.jp/en/template/2018/v50... https://www.sony.co.jp/en/template/2018/v50/en/js/jquery.easing.1.3.js — 200 — 2.1 KiB — 112 ms — h2https://www.sony.co.jp/en/template/2018/v50/en/js/jquery.cookie.jswww.sony.co.jp/en/template/2018/v50... https://www.sony.co.jp/en/template/2018/v50/en/js/jquery.cookie.js — 200 — 1014 B — 110 ms — h2https://www.sony.co.jp/en/template/2018/v50/en/js/includeCommon.jswww.sony.co.jp/en/template/2018/v50... https://www.sony.co.jp/en/template/2018/v50/en/js/includeCommon.js — 200 — 1.8 KiB — 117 ms — h2https://www.sony.co.jp/en/template/2018/v50/en/js/tile.jswww.sony.co.jp/en/template/2018/v50... https://www.sony.co.jp/en/template/2018/v50/en/js/tile.js — 200 — 755 B — 135 ms — 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741 B — 118 ms — h2https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/gnav.jswww.sony.co.jp/en/assets_revamp2025... https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/gnav.js — 200 — 1.1 KiB — 259 ms — h2https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/toggle-slider.jswww.sony.co.jp/en/assets_revamp2025... https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/toggle-slider.js — 200 — 1020 B — 254 ms — h2https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/gnav/sp/children.jswww.sony.co.jp/en/assets_revamp2025... https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/gnav/sp/children.js — 200 — 657 B — 251 ms — h2https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/gnav/children/nav/main.jswww.sony.co.jp/en/assets_revamp2025... https://www.sony.co.jp/en/assets_revamp2025/javascripts/components/global/gnav/children/nav/main.js — 200 — 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h2https://fast.fonts.net/jsapi/otjs/578a125a-fb8e-4772-97b8-e20e93af0918/otf_1336054OTFFeatDisabled.jsfast.fonts.net/jsapi/otjs/578a125a-... https://fast.fonts.net/jsapi/otjs/578a125a-fb8e-4772-97b8-e20e93af0918/otf_1336054OTFFeatDisabled.js — 200 — 1.5 KiB — 24 ms — h2https://fast.fonts.net/jsapi/otjs/4ebfc2b6-f216-4909-8d88-6e5a30c7fce9/otf_1336056OTFFeatDisabled.jsfast.fonts.net/jsapi/otjs/4ebfc2b6-... https://fast.fonts.net/jsapi/otjs/4ebfc2b6-f216-4909-8d88-6e5a30c7fce9/otf_1336056OTFFeatDisabled.js — 200 — 1.5 KiB — 35 ms — h2https://fast.fonts.net/jsapi/otjs/42820f43-064e-4dd9-9393-ff2876e661ba/otf_1336064OTFFeatDisabled.jsfast.fonts.net/jsapi/otjs/42820f43-... https://fast.fonts.net/jsapi/otjs/42820f43-064e-4dd9-9393-ff2876e661ba/otf_1336064OTFFeatDisabled.js — 200 — 1.5 KiB — 36 ms — h2https://fast.fonts.net/jsapi/otjs/806c9117-a475-4e24-ad2d-a223635b9d05/otf_1336066OTFFeatDisabled.jsfast.fonts.net/jsapi/otjs/806c9117-... https://fast.fonts.net/jsapi/otjs/806c9117-a475-4e24-ad2d-a223635b9d05/otf_1336066OTFFeatDisabled.js — 200 — 1.5 KiB — 32 ms — h2https://fast.fonts.net/jsapi/otjs/887aed60-ee4b-461d-b961-cec236a1b9c3/otf_1336058OTFFeatDisabled.jsfast.fonts.net/jsapi/otjs/887aed60-... https://fast.fonts.net/jsapi/otjs/887aed60-ee4b-461d-b961-cec236a1b9c3/otf_1336058OTFFeatDisabled.js — 200 — 1.5 KiB — 36 ms — h2https://fast.fonts.net/jsapi/otjs/a3067331-c595-407c-bbba-4c4cdd9d9355/otf_1346724OTFFeatDisabled.jsfast.fonts.net/jsapi/otjs/a3067331-... https://fast.fonts.net/jsapi/otjs/a3067331-c595-407c-bbba-4c4cdd9d9355/otf_1346724OTFFeatDisabled.js — 200 — 1.5 KiB — 38 ms — h2https://cdn.cookielaw.org/logos/static/ot_guard_logo.svgcdn.cookielaw.org/logos/static/ot_g... https://cdn.cookielaw.org/logos/static/ot_guard_logo.svg — 200 — 512 B — 14 ms — 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h2https://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?d44f19a684109620e484167ca290e818d9c1120d6d0fea3d498fda0806f1e5eae97c96851e3f4384ff35ca4cfffa38c19a656128e0e2395e9e78c9e9c493ea48ca3eaa1aa00e3638f27a199f2a12325909f9600b6715e1d70c8811d584dd172701c22b203f77bb302c65598ebdc5a5d3a02c1dd4e5ef0df8e26922d4a7ff7e011bdc61fc5aea9e5b8a66e22b78708ff6667f6f35817e723d522149357c90edd701799fcfa6e8fadb0e9968469a397712cfb6fa42a809db7e8a8844cd91e9a9d9968dabefd0012dbb23e7b8fe4520917228f1e6bc7f38a75ce3d5905880af56b61bbf874a75c17374205829375f855935c9a854cd774bb10fe39b497d3e13f2&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532fast.fonts.net/dv2/ot/14/f2c57125-0... https://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?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&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532 — 200 — 111.8 KiB — 38 ms — h2https://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27-.0124567ABCDEFGHIJKLMNOPQRSTVWXabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm91api2.fonts.com/FontSubsetter.ashx?d... https://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27-.0124567ABCDEFGHIJKLMNOPQRSTVWXabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm91 — 200 — 10.6 KiB — 31 ms — h2https://ce.mf.marsflag.com/v1/js/mf-search.jsce.mf.marsflag.com/v1/js/mf-search.... https://ce.mf.marsflag.com/v1/js/mf-search.js — 200 — 115.6 KiB — 15 ms — h2https://www.sony.co.jp/en/favicon.icowww.sony.co.jp/en/favicon.ico https://www.sony.co.jp/en/favicon.ico — 200 — 1.4 KiB — 13 ms — h2https://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?d44f19a684109620e484167ca290e818d9c1120d6d0fea3d498fda0806f1e5eae97c96851e3f4384ff35ca4cfffa38c19a656128e0e2395e9e78c9e9c493ea48ca3eaa1aa00e3638f27a199f2a12325909f9600b6715e1d70c8811d584dd172701c22b203f77bb302c65598ebdc5a5d3a02c1dd4e5ef0df8e26922d4a7ff7e011bdc61fc5aea9e5b8a66e22b78708ff6667f6f35817e723d522149357c90edd701799fcfa6e8fadb0e9968469a397712cfb6fa42a809db7e8a8844cd91e9a9d9968dabefd0012dbb23e7b8fe4520917228f1e6bc7f38a75ce3d5905880af56b61bbf874a75c17374205829375f855935c9a854cd774bb10fe39b497d3e13f2&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532fast.fonts.net/dv2/ot/14/f2c57125-0... https://fast.fonts.net/dv2/ot/14/f2c57125-0b07-4b47-9b3e-cb9f6f2217aa.woff2?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&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532 — 304 — 321 B — 13 ms — 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https://api2.fonts.com/FontSubsetter.ashx?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&fctypeId=14&fcId=baeafb7d-3786-412a-8937-caa73e0a83cb&projectId=f2b13cbc-6f40-4ccd-81f1-58d03a620532&content=%20%27(),-.0124567ABCDEFGHIJKLMNOPQRSTVWXYabcdefghijklmnoprstuvwxyz%E2%80%8BBESb%EC%97%90swyMm849100 — 200 — 10.7 KiB — 17 ms — h2https://www.sony.co.jp/en/template/2020/en/img/ico_search.svgwww.sony.co.jp/en/template/2020/en/... https://www.sony.co.jp/en/template/2020/en/img/ico_search.svg — 200 — 432 B — 85 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 174184ms · 367KB · €1891/mo
www.sony.co.jp
Other
Costly
Execution 159332ms
Transfer 27 KB
Monthly Cost €1730/mo
fast.fonts.net
Other
Costly
Execution 7703ms
Transfer 23 KB
Monthly Cost €84/mo
Unattributable
Other
Costly
Execution 1800ms
Transfer 0 KB
Monthly Cost €20/mo
www.sony.co.jp
Other
Costly
Execution 1628ms
Transfer 1 KB
Monthly Cost €18/mo
www.sony.co.jp
Other
Costly
Execution 1263ms
Transfer 16 KB
Monthly Cost €14/mo
OneTrust
Consent
Essential
Execution 450ms
Transfer 127 KB
Unused 52%
Monthly Cost €5/mo
www.sony.co.jp
Other
Costly
Execution 329ms
Transfer 2 KB
Monthly Cost €4/mo
www.sony.co.jp
Other
Costly
Execution 322ms
Transfer 1 KB
Monthly Cost €3/mo
ce.mf.marsflag.com
Other
Costly
Execution 298ms
Transfer 116 KB
Unused 52%
Monthly Cost €3/mo
www.sony.co.jp
Other
Costly
Execution 253ms
Transfer 1 KB
Monthly Cost €3/mo
www.sony.co.jp
Other
Optional
Execution 189ms
Transfer 1 KB
Monthly Cost €2/mo
www.sony.co.jp
Other
Optional
Execution 180ms
Transfer 3 KB
Monthly Cost €2/mo
www.sony.co.jp
Other
Optional
Execution 137ms
Transfer 15 KB
Monthly Cost €1/mo
OneTrust
Consent
Essential
Execution 114ms
Transfer 4 KB
Monthly Cost €1/mo
www.sony.co.jp
Other
Optional
Execution 105ms
Transfer 1 KB
Monthly Cost €1/mo
www.sony.co.jp
Other
Optional
Execution 81ms
Transfer 30 KB
Unused 70%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.sony.co.jp adds 159332ms and costs ~€1730/month
  • fast.fonts.net adds 7703ms and costs ~€84/month
  • Unattributable adds 1800ms and costs ~€20/month
  • www.sony.co.jp adds 1628ms and costs ~€18/month
  • www.sony.co.jp adds 1263ms and costs ~€14/month
  • www.sony.co.jp adds 329ms and costs ~€4/month
  • www.sony.co.jp adds 322ms and costs ~€3/month
  • ce.mf.marsflag.com adds 298ms and costs ~€3/month
  • www.sony.co.jp adds 253ms and costs ~€3/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.sony.co.jp takes 159332ms 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

fast.fonts.net takes 7703ms 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 1800ms 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.sony.co.jp takes 1628ms 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.sony.co.jp takes 1263ms 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

52% of OneTrust'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.sony.co.jp takes 329ms 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.sony.co.jp takes 322ms 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

ce.mf.marsflag.com takes 298ms 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

52% of ce.mf.marsflag.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

www.sony.co.jp takes 253ms 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

70% of www.sony.co.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

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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