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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
71
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
51
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
73
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.

1.94 s

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

3.26 s

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

18 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.

2.04 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.

3.89 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
15
6 PASS 2 REVIEW 5 FIX
D
Page Weight Budget
Action
2.4 MB transferred, 88 requests
FIX
2.4 MB transferred, 88 requests
Info::
Page weighs 6.5 MB (2.4 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
Fonts are 274 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 274 KB
Info::
88 HTTP requests
Info::
Estimated 0.51 g CO2 per page load
2.4 MB / 2.4 MB budget
2.4 MB transferred
88 requests
0.51 g CO2 per page load
JavaScript 1.2 MiB 49%
Images 737.4 KiB 30%
Fonts 274.5 KiB 11%
CSS 127.9 KiB 5%
HTML 119.0 KiB 5%
Other 1.9 KiB 0%
Other 952 B 0%
Other 860 B 0%
Other 403 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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

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 (2.4 MiB of 2.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
11 scripts, 904 KB unused
FIX
11 scripts, 904 KB unused
Warning::
https://s.gr-assets.com/assets/react_client_side/e...: 508 KB unused (85%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.gr-assets.com/assets/application-3b88b3d...: 225 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.gr-assets.com/assets/desktop/libraries-c...: 100 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://s.gr-assets.com/assets/react_client_side/s...: 70 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 904 KB
904 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://s.gr-assets.com/assets/react_client_side/external_dependencies-ebf499aa1f.js604 KB508 KB (85%)✓3rd
https://s.gr-assets.com/assets/application-3b88b3dd33277f9d7713cfd1fcaacf09.js271 KB225 KB (83%)✓3rd
https://s.gr-assets.com/assets/desktop/libraries-c07ee2e4be9ade4a64546b3ec60b523b.js152 KB100 KB (67%)✓3rd
https://s.gr-assets.com/assets/react_client_side/site_header-fbcaecc757.js139 KB70 KB (50%)✓3rd
https://s.gr-assets.com/assets/webfontloader-c578336baa6da50a1f0d46c5164fc699.js5 KB—✓3rd
https://s.gr-assets.com/assets/fb_dep_form-e2e4a0d9dc062011458143c32b2d789b.js1 KB—✓3rd
https://m.media-amazon.com/images/G/01/csminstrumentation/ue-full-11e51f253e8ad9d145f4ed644b40f692._V1_.js7 KB—✓3rd
https://s.gr-assets.com/assets/react_client_side/custom_react_ujs-b1220d5e0a4820e90b905c302fc5cb52.js1 KB—✓3rd
https://m.media-amazon.com/images/I/41mrkPcyPwL.js9 KB—✓3rd
https://platform.twitter.com/widgets.js27 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

F
Page Weight Inventory
Action
88 resources · 2.4 MB · 904 KB savings available
FIX
88 resources · 2.4 MB · 904 KB savings available
Warning::
Page weight 1.4 MB over 1MB target
Got: 2.4 MB Expected: ≤ 1 MB
Info::
~904 KB of savings available
Warning::
87 third-party resources (100% of weight)
Info::
3 resources over 200KB
88 resources · 2.4 MiB · 87 third-party 1.4 MiB over 1MB target
JavaScript 49% · 1.2 MiB
Image 30% · 739.1 KiB
Font 11% · 274.5 KiB
CSS 5% · 127.9 KiB
Document 5% · 119.4 KiB
Other 0% · 1.9 KiB

~904.0 KiB of savings available

Remove unused JavaScript: 904.0 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
59 images, 0 KB saveable
REVIEW
59 images, 0 KB saveable
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/site_footer/footer_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/site_footer/footer_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/app/badge-android-d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.gr-assets.com/blogs/1774642880p7/31... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/award/2025/choice-l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/site_footer/footer_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/site_footer/footer_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/layout/header/v2/go... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/site_footer/footer_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/home/discovery_arro... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/app/badge-ios-deskt... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://s.gr-assets.com/assets/an-amazon-company-l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://i.gr-assets.com/images/S/compressed.photo.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
59 images 737 KB
0 oversized -0 KB
58 legacy format
25 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

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

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

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

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

Source: web.dev / Core Web Vitals

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
368ms total JS execution
PASS
368ms total JS execution
Info::
Unattributable: 95ms CPU time
Info::
https://s.gr-assets.com/assets/react_client_side/e...: 74ms CPU time
Info::
https://s.gr-assets.com/assets/react_client_side/s...: 67ms CPU time
Info::
https://s.gr-assets.com/assets/desktop/libraries-c...: 67ms CPU time
Info::
https://www.goodreads.com/: 65ms CPU time
Warning::
Third-party scripts: 368ms (100% of total)

Main Thread Breakdown

Script Evaluation 45% Other 22% Script Parsing & Compilation 19% Style & Layout 10%
ScriptTotalScriptingParse/CompileParty
Unattributable95ms2ms0ms3rd
https://s.gr-assets.com/assets/react_client_side/external_dependencies-ebf499aa1f.js74ms26ms46ms3rd
https://s.gr-assets.com/assets/react_client_side/site_header-fbcaecc757.js67ms49ms15ms3rd
https://s.gr-assets.com/assets/desktop/libraries-c07ee2e4be9ade4a64546b3ec60b523b.js67ms46ms10ms3rd
https://www.goodreads.com/65ms8ms1ms3rd
A+
Font Loading
6 fonts (274 KB)
PASS
6 fonts (274 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

274 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 1.9 s LCP 3.3 shttps://s.gr-assets.com/assets/lato/LatoLatin-Regular-1c0bbd257c304f0c439ffca5188bf64d.woff2LatoLatin-Regular-1c0bb... https://s.gr-assets.com/assets/lato/LatoLatin-Regular-1c0bbd257c304f0c439ffca5188bf64d.woff2 — 43.3 KiB — 96 ms — font-display: swaphttps://s.gr-assets.com/assets/lato/LatoLatin-Bold-68ef13b1d5b140f6454beaf8620f0d00.woff2LatoLatin-Bold-68ef13b1... https://s.gr-assets.com/assets/lato/LatoLatin-Bold-68ef13b1d5b140f6454beaf8620f0d00.woff2 — 44.0 KiB — 103 ms — font-display: swaphttps://s.gr-assets.com/assets/lato/LatoLatin-Italic-3c16c00fcdb07eb96a6bf4eefa26d1f9.woff2LatoLatin-Italic-3c16c0... https://s.gr-assets.com/assets/lato/LatoLatin-Italic-3c16c00fcdb07eb96a6bf4eefa26d1f9.woff2 — 44.9 KiB — 89 ms — font-display: swaphttps://s.gr-assets.com/assets/mw/merriweather-regular-gr-01abdd2b4e6be250f29285f7248e978d.woff2merriweather-regular-gr... https://s.gr-assets.com/assets/mw/merriweather-regular-gr-01abdd2b4e6be250f29285f7248e978d.woff2 — 44.9 KiB — 99 ms — font-display: swaphttps://s.gr-assets.com/assets/mw/merriweather-bold-gr-97a99a0fdb5f796fd06d1a1592c6b9fc.woff2merriweather-bold-gr-97... https://s.gr-assets.com/assets/mw/merriweather-bold-gr-97a99a0fdb5f796fd06d1a1592c6b9fc.woff2 — 45.0 KiB — 67 ms — font-display: swaphttps://s.gr-assets.com/assets/mw/merriweather-italic-gr-09ea79839f9f0f72fe4d3e19f58d8e6a.woff2merriweather-italic-gr-... https://s.gr-assets.com/assets/mw/merriweather-italic-gr-09ea79839f9f0f72fe4d3e19f58d8e6a.woff2 — 52.3 KiB — 74 ms — font-display: swap
LatoLatin-Regular-1c0bb... woff2 swap
Size 43 KB
Load time 96 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
LatoLatin-Bold-68ef13b1... woff2 swap
Size 44 KB
Load time 103 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
LatoLatin-Italic-3c16c0... woff2 swap
Size 45 KB
Load time 89 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
merriweather-regular-gr... woff2 swap
Size 45 KB
Load time 99 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
merriweather-bold-gr-97... woff2 swap
Size 45 KB
Load time 67 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
merriweather-italic-gr-... woff2 swap
Size 52 KB
Load time 74 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)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
88 requests over 1931ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.9 s LCP 3.3 shttps://goodreads.com// https://goodreads.com/ — 301 — 388 B — 308 ms — http/1.1https://www.goodreads.com/www.goodreads.com/ https://www.goodreads.com/ — 200 — 15.7 KiB — 549 ms — h2https://s.gr-assets.com/assets/webfontloader-c578336baa6da50a1f0d46c5164fc699.jss.gr-assets.com/assets/webfontloade... https://s.gr-assets.com/assets/webfontloader-c578336baa6da50a1f0d46c5164fc699.js — 200 — 5.2 KiB — 144 ms — h2https://s.gr-assets.com/assets/goodreads-65a131a53d360d5f3f6afd8bc83ee6e0.csss.gr-assets.com/assets/goodreads-65... https://s.gr-assets.com/assets/goodreads-65a131a53d360d5f3f6afd8bc83ee6e0.css — 200 — 99.6 KiB — 127 ms — h2https://s.gr-assets.com/assets/gr/pages/home/signed_out_hp-5c5e54467917b66684387a212840ef84.csss.gr-assets.com/assets/gr/pages/hom... https://s.gr-assets.com/assets/gr/pages/home/signed_out_hp-5c5e54467917b66684387a212840ef84.css — 200 — 3.0 KiB — 186 ms — h2https://s.gr-assets.com/assets/common_images-52bf53648cedebbe6988969ad4c628e3.csss.gr-assets.com/assets/common_image... https://s.gr-assets.com/assets/common_images-52bf53648cedebbe6988969ad4c628e3.css — 200 — 23.7 KiB — 142 ms — h2https://s.gr-assets.com/assets/desktop/libraries-c07ee2e4be9ade4a64546b3ec60b523b.jss.gr-assets.com/assets/desktop/libr... https://s.gr-assets.com/assets/desktop/libraries-c07ee2e4be9ade4a64546b3ec60b523b.js — 200 — 151.5 KiB — 181 ms — h2https://s.gr-assets.com/assets/application-3b88b3dd33277f9d7713cfd1fcaacf09.jss.gr-assets.com/assets/application-... https://s.gr-assets.com/assets/application-3b88b3dd33277f9d7713cfd1fcaacf09.js — 200 — 271.4 KiB — 210 ms — h2https://s.gr-assets.com/assets/fb_dep_form-e2e4a0d9dc062011458143c32b2d789b.jss.gr-assets.com/assets/fb_dep_form-... https://s.gr-assets.com/assets/fb_dep_form-e2e4a0d9dc062011458143c32b2d789b.js — 200 — 1.2 KiB — 183 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 368ms · 911KB · $5/mo
Unattributable
Other
Optional
Execution 95ms
Transfer 0 KB
Monthly Cost $1/mo
s.gr-assets.com
Other
Optional
Execution 74ms
Transfer 604 KB
Unused 85%
Monthly Cost $1/mo
s.gr-assets.com
Other
Optional
Execution 67ms
Transfer 139 KB
Unused 50%
Monthly Cost $1/mo
s.gr-assets.com
Other
Optional
Execution 67ms
Transfer 152 KB
Unused 67%
Monthly Cost $1/mo
www.goodreads.com
Other
Optional
Execution 65ms
Transfer 16 KB
Monthly Cost $1/mo

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

85% of s.gr-assets.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

50% of s.gr-assets.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

67% of s.gr-assets.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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