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https://synology.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
40
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

7.69 s

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

12.49 s

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

702 ms

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

0.001

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

7.69 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.

14.88 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
10.1 MB transferred, 93 requests
FIX
10.1 MB transferred, 93 requests
Critical::
Page weighs 13.0 MB (10.1 MB transferred)
Warning::
Images are 6.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 6.5 MB
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
93 HTTP requests
Info::
Estimated 2.1 g CO2 per page load
10.1 MB / 2.4 MB budget
10.1 MB transferred
93 requests
2.1 g CO2 per page load
Images 6.5 MiB 64%
Other 1.9 MiB 18%
JavaScript 1.3 MiB 13%
Fonts 150.8 KiB 1%
Other 141.8 KiB 1%
CSS 110.9 KiB 1%
Other 64.8 KiB 1%
HTML 38.5 KiB 0%
Other 2.0 KiB 0%
Other 0 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 (10.1 MiB of 10.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
6821ms total JS execution
FIX
6821ms total JS execution
Warning::
https://www.synology.com/js/vendor/splide-extensio...: 2229ms CPU time
Warning::
https://www.synology.com/js/vendor/dsygno/dsygno-v...: 1786ms CPU time
Warning::
Unattributable: 742ms CPU time
Warning::
https://www.synology.com/en-global: 489ms CPU time
Warning::
https://www.synology.com/js/vendor/jquery.js: 406ms CPU time
Warning::
Third-party scripts: 6821ms (100% of total)

Main Thread Breakdown

Script Evaluation 41% Other 23% Style & Layout 15% Parse HTML & CSS 8% Rendering 8% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.synology.com/js/vendor/splide-extension-auto-scroll/dist/js/splide-extension-auto-scroll.min.js2229ms647ms2ms3rd
https://www.synology.com/js/vendor/dsygno/dsygno-v3.50.0.js?v=12de1e1786ms885ms81ms3rd
Unattributable742ms43ms0ms3rd
https://www.synology.com/en-global489ms74ms10ms3rd
https://www.synology.com/js/vendor/jquery.js406ms238ms8ms3rd
https://www.synology.com/build/assets/js/main.DYnHygkW.js351ms346ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PNPJHJ2330ms276ms50ms3rd
https://www.synology.com/js/vendor/splide/dist/js/splide.js200ms102ms8ms3rd
https://www.synology.com/js/vendor-legacy.concat.js92ms60ms15ms3rd
https://cdn.livechatinc.com/tracking.js84ms72ms8ms3rd

Showing top 10 of 12 scripts

D
JS Bundles
Action
47 scripts, 399 KB unused
FIX
47 scripts, 399 KB unused
Warning::
https://www.synology.com/js/vendor/dsygno/dsygno-v...: 140 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PNP...: 80 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.synology.com/js/vendor-legacy.concat.j...: 43 KB unused (81%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.synology.com/build/assets/js/ask.DbvaE...: 38 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.synology.com/js/vendor/dsygno/dsygno-v...: 37 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 399 KB
399 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.synology.com/js/vendor/dsygno/dsygno-v3.50.0.js?v=12de1e316 KB140 KB (44%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PNPJHJ2175 KB80 KB (46%)✓3rd
https://www.synology.com/js/vendor-legacy.concat.js54 KB43 KB (81%)✓3rd
https://www.synology.com/build/assets/js/ask.DbvaElvo.js63 KB38 KB (62%)✓3rd
https://www.synology.com/js/vendor/dsygno/dsygno-v2.21.0.js51 KB37 KB (74%)✓3rd
https://www.synology.com/js/vendor/vue.global.js66 KB30 KB (46%)✓3rd
https://www.synology.com/build/assets/js/visible.vPb2yH2r.js69 KB28 KB (41%)✓3rd
https://www.synology.com/build/assets/js/ask.bGBl8PMY.js1 KB—✓3rd
https://www.synology.com/js/syno/home/ai-advisor.js?v=12de1e4 KB—✓3rd
https://www.synology.com/build/assets/js/translate.BzvSeT7C.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

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

D
Page Weight Inventory
Action
93 resources · 10.1 MB · 399 KB savings available
FIX
93 resources · 10.1 MB · 399 KB savings available
Warning::
Page weight 9.1 MB over 1MB target
Got: 10.1 MB Expected: ≤ 1 MB
Info::
~399 KB of savings available
Warning::
92 third-party resources (100% of weight)
Info::
8 resources over 200KB
93 resources · 10.1 MiB · 92 third-party 9.1 MiB over 1MB target
Image 65% · 6.6 MiB
Media 18% · 1.9 MiB
JavaScript 13% · 1.3 MiB
Font 1% · 150.8 KiB
CSS 1% · 110.9 KiB
Other 1% · 66.7 KiB
Document 0% · 42.8 KiB

~398.6 KiB of savings available

Remove unused JavaScript: 398.6 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.

B
Image Optimization
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Info::
All images are well-optimized
19 images 6.5 MB
0 oversized -0 KB
18 legacy format
0 missing dimensions CLS risk
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
4 fonts (151 KB)
PASS
4 fonts (151 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

151 KB total

Render-blocking

0

of 4

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 FCP 7.7 s LCP 12.5 shttps://synostatic.synology.com/font/inter/inter-w600-7.woff2inter-w600-7.woff2 https://synostatic.synology.com/font/inter/inter-w600-7.woff2 — 37.7 KiB — 108 ms — font-display: swaphttps://synostatic.synology.com/font/inter/inter-w400-7.woff2inter-w400-7.woff2 https://synostatic.synology.com/font/inter/inter-w400-7.woff2 — 37.7 KiB — 99 ms — font-display: swaphttps://synostatic.synology.com/font/inter/inter-w700-7.woff2inter-w700-7.woff2 https://synostatic.synology.com/font/inter/inter-w700-7.woff2 — 37.7 KiB — 24 ms — font-display: swaphttps://synostatic.synology.com/font/inter/inter-w500-7.woff2inter-w500-7.woff2 https://synostatic.synology.com/font/inter/inter-w500-7.woff2 — 37.7 KiB — 27 ms — font-display: swap
inter-w600-7.woff2 woff2 swap
Size 38 KB
Load time 108 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
inter-w400-7.woff2 woff2 swap
Size 38 KB
Load time 99 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
inter-w700-7.woff2 woff2 swap
Size 38 KB
Load time 24 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
inter-w500-7.woff2 woff2 swap
Size 38 KB
Load time 27 ms
Start 1.7 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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
—
preload
5
dns-prefetch
—
prefetch
—

5 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
93 requests over 3326ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 7.7 s LCP 12.5 shttps://synology.com// https://synology.com/ — 301 — 86 B — 318 ms — h2https://www.synology.com/www.synology.com/ https://www.synology.com/ — 302 — 4.1 KiB — 351 ms — h2https://www.synology.com/en-globalwww.synology.com/en-global https://www.synology.com/en-global — 200 — 37.6 KiB — 359 ms — h2https://www.synology.com/js/vendor/vue.global.jswww.synology.com/js/vendor/vue.glob... https://www.synology.com/js/vendor/vue.global.js — 200 — 66.2 KiB — 34 ms — h2https://www.synology.com/js/vendor/jquery.jswww.synology.com/js/vendor/jquery.j... https://www.synology.com/js/vendor/jquery.js — 200 — 35.0 KiB — 42 ms — h2https://www.synology.com/js/syno/dom_vue.jswww.synology.com/js/syno/dom_vue.js https://www.synology.com/js/syno/dom_vue.js — 200 — 716 B — 43 ms — h2https://www.synology.com/build/assets/css/synoec_item_relative.BTXA5I2k.csswww.synology.com/build/assets/css/s... https://www.synology.com/build/assets/css/synoec_item_relative.BTXA5I2k.css — 200 — 1.5 KiB — 32 ms — h2https://www.synology.com/build/assets/css/syno.C_X-bDCj.csswww.synology.com/build/assets/css/s... https://www.synology.com/build/assets/css/syno.C_X-bDCj.css — 200 — 66.1 KiB — 51 ms — h2https://www.synology.com/build/assets/js/syno_app.CVyVm6mx.jswww.synology.com/build/assets/js/sy... https://www.synology.com/build/assets/js/syno_app.CVyVm6mx.js — 200 — 9.3 KiB — 63 ms — h2https://www.synology.com/build/assets/js/general-components.BEt4FOpn.jswww.synology.com/build/assets/js/ge... https://www.synology.com/build/assets/js/general-components.BEt4FOpn.js — 200 — 12.0 KiB — 64 ms — h2https://www.synology.com/build/assets/js/visible.vPb2yH2r.jswww.synology.com/build/assets/js/vi... https://www.synology.com/build/assets/js/visible.vPb2yH2r.js — 200 — 69.1 KiB — 91 ms — h2https://www.synology.com/build/assets/js/chunks/_plugin-vue_export-helper.BCo6x5W8.jswww.synology.com/build/assets/js/ch... https://www.synology.com/build/assets/js/chunks/_plugin-vue_export-helper.BCo6x5W8.js — 200 — 495 B — 93 ms — h2https://www.synology.com/build/assets/js/chunks/synoec_item_relative.vue_vue_type_style_index_0_scoped_46094ac8_lang.BjokzayP.jswww.synology.com/build/assets/js/ch... https://www.synology.com/build/assets/js/chunks/synoec_item_relative.vue_vue_type_style_index_0_scoped_46094ac8_lang.BjokzayP.js — 200 — 13.6 KiB — 64 ms — h2https://www.synology.com/build/assets/css/ask.C3uIAlIP.csswww.synology.com/build/assets/css/a... https://www.synology.com/build/assets/css/ask.C3uIAlIP.css — 200 — 7.6 KiB — 49 ms — h2https://www.synology.com/build/assets/css/main.XD0Ebkb-.csswww.synology.com/build/assets/css/m... https://www.synology.com/build/assets/css/main.XD0Ebkb-.css — 200 — 2.7 KiB — 50 ms — h2https://www.synology.com/build/assets/js/main.DYnHygkW.jswww.synology.com/build/assets/js/ma... https://www.synology.com/build/assets/js/main.DYnHygkW.js — 200 — 8.8 KiB — 66 ms — h2https://www.synology.com/build/assets/js/translate.BzvSeT7C.jswww.synology.com/build/assets/js/tr... https://www.synology.com/build/assets/js/translate.BzvSeT7C.js — 200 — 725 B — 64 ms — h2https://www.synology.com/build/assets/js/ask.DbvaElvo.jswww.synology.com/build/assets/js/as... https://www.synology.com/build/assets/js/ask.DbvaElvo.js — 200 — 62.6 KiB — 99 ms — h2https://www.synology.com/build/assets/js/ask.bGBl8PMY.jswww.synology.com/build/assets/js/as... https://www.synology.com/build/assets/js/ask.bGBl8PMY.js — 200 — 1.3 KiB — 65 ms — h2https://www.synology.com/build/assets/js/google-analysis.Bzkmkkxw.jswww.synology.com/build/assets/js/go... https://www.synology.com/build/assets/js/google-analysis.Bzkmkkxw.js — 200 — 597 B — 68 ms — h2https://www.synology.com/build/assets/js/question-list.B27OhGMd.jswww.synology.com/build/assets/js/qu... https://www.synology.com/build/assets/js/question-list.B27OhGMd.js — 200 — 497 B — 69 ms — h2https://www.synology.com/build/assets/js/translate.CIecexaw.jswww.synology.com/build/assets/js/tr... https://www.synology.com/build/assets/js/translate.CIecexaw.js — 200 — 728 B — 90 ms — h2https://www.synology.com/build/assets/js/chunks/punycode.es6.CEshK6jf.jswww.synology.com/build/assets/js/ch... https://www.synology.com/build/assets/js/chunks/punycode.es6.CEshK6jf.js — 200 — 30.7 KiB — 72 ms — h2https://www.synology.com/build/assets/js/chunks/_commonjsHelpers.lGe4XDVY.jswww.synology.com/build/assets/js/ch... https://www.synology.com/build/assets/js/chunks/_commonjsHelpers.lGe4XDVY.js — 200 — 577 B — 73 ms — h2https://www.synology.com/build/assets/js/resource-identity.DHJFy5tE.jswww.synology.com/build/assets/js/re... https://www.synology.com/build/assets/js/resource-identity.DHJFy5tE.js — 200 — 850 B — 90 ms — h2https://www.synology.com/build/assets/js/question.Br8G45pI.jswww.synology.com/build/assets/js/qu... https://www.synology.com/build/assets/js/question.Br8G45pI.js — 200 — 599 B — 73 ms — h2https://www.synology.com/js/vendor/dsygno/dsygno-v2.21.0.jswww.synology.com/js/vendor/dsygno/d... https://www.synology.com/js/vendor/dsygno/dsygno-v2.21.0.js — 200 — 51.3 KiB — 87 ms — h2https://www.synology.com/js/vendor/dsygno/dsygno-v2.21.0.css?v=b0323fwww.synology.com/js/vendor/dsygno/d... https://www.synology.com/js/vendor/dsygno/dsygno-v2.21.0.css?v=b0323f — 200 — 19.1 KiB — 86 ms — h2https://www.synology.com/js/vendor/dsygno/dsygno-v3.50.0.css?v=b0323fwww.synology.com/js/vendor/dsygno/d... https://www.synology.com/js/vendor/dsygno/dsygno-v3.50.0.css?v=b0323f — 200 — 3.6 KiB — 49 ms — h2https://www.synology.com/js/vendor/dsygno/dsygno-vue-v3.46.0.css?v=b0323fwww.synology.com/js/vendor/dsygno/d... https://www.synology.com/js/vendor/dsygno/dsygno-vue-v3.46.0.css?v=b0323f — 200 — 4.1 KiB — 50 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 7.7 s LCP 12.5 shttps://synology.com// https://synology.com/ — 301 — 86 B — 318 ms — h2https://www.synology.com/www.synology.com/ https://www.synology.com/ — 302 — 4.1 KiB — 351 ms — h2https://www.synology.com/en-globalwww.synology.com/en-global https://www.synology.com/en-global — 200 — 37.6 KiB — 359 ms — h2https://www.synology.com/js/vendor/vue.global.jswww.synology.com/js/vendor/vue.glob... https://www.synology.com/js/vendor/vue.global.js — 200 — 66.2 KiB — 34 ms — h2https://www.synology.com/js/vendor/jquery.jswww.synology.com/js/vendor/jquery.j... https://www.synology.com/js/vendor/jquery.js — 200 — 35.0 KiB — 42 ms — h2https://www.synology.com/js/syno/dom_vue.jswww.synology.com/js/syno/dom_vue.js https://www.synology.com/js/syno/dom_vue.js — 200 — 716 B — 43 ms — h2https://www.synology.com/build/assets/css/synoec_item_relative.BTXA5I2k.csswww.synology.com/build/assets/css/s... https://www.synology.com/build/assets/css/synoec_item_relative.BTXA5I2k.css — 200 — 1.5 KiB — 32 ms — h2https://www.synology.com/build/assets/css/syno.C_X-bDCj.csswww.synology.com/build/assets/css/s... https://www.synology.com/build/assets/css/syno.C_X-bDCj.css — 200 — 66.1 KiB — 51 ms — h2https://www.synology.com/build/assets/js/syno_app.CVyVm6mx.jswww.synology.com/build/assets/js/sy... https://www.synology.com/build/assets/js/syno_app.CVyVm6mx.js — 200 — 9.3 KiB — 63 ms — h2https://www.synology.com/build/assets/js/general-components.BEt4FOpn.jswww.synology.com/build/assets/js/ge... https://www.synology.com/build/assets/js/general-components.BEt4FOpn.js — 200 — 12.0 KiB — 64 ms — h2https://www.synology.com/build/assets/js/visible.vPb2yH2r.jswww.synology.com/build/assets/js/vi... https://www.synology.com/build/assets/js/visible.vPb2yH2r.js — 200 — 69.1 KiB — 91 ms — h2https://www.synology.com/build/assets/js/chunks/_plugin-vue_export-helper.BCo6x5W8.jswww.synology.com/build/assets/js/ch... https://www.synology.com/build/assets/js/chunks/_plugin-vue_export-helper.BCo6x5W8.js — 200 — 495 B — 93 ms — h2https://www.synology.com/build/assets/js/chunks/synoec_item_relative.vue_vue_type_style_index_0_scoped_46094ac8_lang.BjokzayP.jswww.synology.com/build/assets/js/ch... https://www.synology.com/build/assets/js/chunks/synoec_item_relative.vue_vue_type_style_index_0_scoped_46094ac8_lang.BjokzayP.js — 200 — 13.6 KiB — 64 ms — h2https://www.synology.com/build/assets/css/ask.C3uIAlIP.csswww.synology.com/build/assets/css/a... https://www.synology.com/build/assets/css/ask.C3uIAlIP.css — 200 — 7.6 KiB — 49 ms — h2https://www.synology.com/build/assets/css/main.XD0Ebkb-.csswww.synology.com/build/assets/css/m... https://www.synology.com/build/assets/css/main.XD0Ebkb-.css — 200 — 2.7 KiB — 50 ms — h2https://www.synology.com/build/assets/js/main.DYnHygkW.jswww.synology.com/build/assets/js/ma... https://www.synology.com/build/assets/js/main.DYnHygkW.js — 200 — 8.8 KiB — 66 ms — h2https://www.synology.com/build/assets/js/translate.BzvSeT7C.jswww.synology.com/build/assets/js/tr... https://www.synology.com/build/assets/js/translate.BzvSeT7C.js — 200 — 725 B — 64 ms — h2https://www.synology.com/build/assets/js/ask.DbvaElvo.jswww.synology.com/build/assets/js/as... https://www.synology.com/build/assets/js/ask.DbvaElvo.js — 200 — 62.6 KiB — 99 ms — h2https://www.synology.com/build/assets/js/ask.bGBl8PMY.jswww.synology.com/build/assets/js/as... https://www.synology.com/build/assets/js/ask.bGBl8PMY.js — 200 — 1.3 KiB — 65 ms — h2https://www.synology.com/build/assets/js/google-analysis.Bzkmkkxw.jswww.synology.com/build/assets/js/go... https://www.synology.com/build/assets/js/google-analysis.Bzkmkkxw.js — 200 — 597 B — 68 ms — 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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 6821ms · 742KB · €74/mo
www.synology.com
Other
Costly
Execution 2229ms
Transfer 3 KB
Monthly Cost €24/mo
www.synology.com
Other
Costly
Execution 1786ms
Transfer 316 KB
Unused 44%
Monthly Cost €19/mo
Unattributable
Other
Costly
Execution 742ms
Transfer 0 KB
Monthly Cost €8/mo
www.synology.com
Other
Costly
Execution 489ms
Transfer 38 KB
Monthly Cost €5/mo
www.synology.com
Other
Costly
Execution 406ms
Transfer 35 KB
Monthly Cost €4/mo
www.synology.com
Other
Costly
Execution 351ms
Transfer 9 KB
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 330ms
Transfer 175 KB
Unused 46%
Monthly Cost €4/mo
www.synology.com
Other
Costly
Execution 200ms
Transfer 26 KB
Monthly Cost €2/mo
www.synology.com
Other
Optional
Execution 92ms
Transfer 54 KB
Unused 81%
Monthly Cost €1/mo
LiveChat
Chat
Optional
Execution 84ms
Transfer 33 KB
Monthly Cost €1/mo
www.synology.com
Other
Optional
Execution 57ms
Transfer 51 KB
Unused 74%
Monthly Cost €1/mo
api-fra.livechatinc.com
Other
Optional
Execution 55ms
Transfer 2 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.synology.com adds 2229ms and costs ~€24/month
  • www.synology.com adds 1786ms and costs ~€19/month
  • Unattributable adds 742ms and costs ~€8/month
  • www.synology.com adds 489ms and costs ~€5/month
  • www.synology.com adds 406ms and costs ~€4/month
  • www.synology.com adds 351ms and costs ~€4/month
  • Google Tag Manager adds 330ms and costs ~€4/month
  • www.synology.com adds 200ms and costs ~€2/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.synology.com takes 2229ms 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.synology.com takes 1786ms 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 742ms 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.synology.com takes 489ms 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.synology.com takes 406ms 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.synology.com takes 351ms 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 330ms 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.synology.com takes 200ms 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

81% of www.synology.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

74% of www.synology.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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